CN104577347A - Dual-band multi-polarization common-caliber waveguide slot antenna - Google Patents
Dual-band multi-polarization common-caliber waveguide slot antenna Download PDFInfo
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- CN104577347A CN104577347A CN201410722902.6A CN201410722902A CN104577347A CN 104577347 A CN104577347 A CN 104577347A CN 201410722902 A CN201410722902 A CN 201410722902A CN 104577347 A CN104577347 A CN 104577347A
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Abstract
The invention relates to a dual-band multi-polarization common-caliber waveguide slot antenna which comprises an L-band vertical polarization antenna, a C-band vertical polarization antenna and a C-band horizontal polarization antenna, which are equal in length and are waveguide slot antennas. The C-band vertical polarization antenna and the C-band horizontal polarization antenna form a C-band dual-polarization antenna array which is positioned at the upper part, and the L-band vertical polarization antenna is positioned at the lower part; the L-band vertical polarization antenna, the C-band vertical polarization antenna and the C-band horizontal polarization antenna feed at an antenna waveguide tube center through a coaxial connector, and the coaxial connector and a waveguide tube form a 3dB power divider. The exciting effect on the L-band vertical polarization antenna, the C-band vertical polarization antenna and the C-band horizontal polarization antenna is realized. The dual-band multi-polarization common-caliber waveguide slot antenna realizes sharing of a plurality of waveguide slot antennas on the same physical caliber area. Compared with a dual-band multi-polarization micro-strip common-caliber antenna, the antenna has the advantages of being high in efficiency, high in polarization isolation, low in cross polarization and high in power capacity.
Description
Technical field
The invention belongs to antenna technical field, be specifically related to two-band multipolarization common reflector, specifically a kind of two-band multipolarization common reflector be made up of three kinds of metal radiation waveguides.Namely the present invention can be used for receiving, and also can be used for launching radio wave.At military aspect, can be used as the terminal antenna of phased array radar system.In civilian, can be used as spaceborne radar antenna, weather radar scanner etc.
Background technology
Along with application and the rapid progress of demand, on the one hand, the electronic equipment working in each frequency gets more and more; On the other hand, the platform such as carrier-borne, airborne, spaceborne is subject to the restriction of limited space, to antenna volume, weight, every electrical performance indexes such as efficiency proposes more and more stricter requirement, particularly in radar system, large percentage shared by antenna, therefore carry out loss of weight to it, section compresses, and raising antenna efficiency and Integration Design are necessary.
Radar system needs to work in each frequency range according to application background, and several radars of usual different frequency range are put together the data required for could obtaining.If a radar by used in combination for height frequency range, can realize respective advantage under different environment and condition of work.Such as SAR radar system, the decay that the woods are caused when low-frequency range and three-dimensional scattering less, there is during high band good resolution, target recognition and tracking function.
At present, SAR antenna important application trend is designed by Shared aperture exactly, realize multiband, multipolarization antenna on same physics bore.Multipolarization can improve amount of information, and multiband work needs to provide different scanning resolutions according to application.If shared to by these antenna on an antenna array, the information obtained when the different polarimetric radar of different frequency range is measured can be given full play to; Common reflector not only reduces the volume and weight of antenna, the information obtained when having given full play to the work of different frequency range radar; Fully can be improved the payload of system by Shared aperture design, improve energy use efficiency.
The contained X-band of U.S.'s shuttle Endeavour in 2000, band dual-polarized three wave bands of L/C independently antenna complete high-resolution global three-dimensional measurement, and under showing different frequency range and not same polarization, antenna can bring more target information.But due to three independently antennas, antenna is huge and heavy, and total weight is more than 3 tons.Therefore, overcoming the most effective way of these problems adopts antenna Shared aperture to design exactly.In the past in 20 years, there is the design of many proposition dual-frequency/polarization antennas both at home and abroad.Roughly 2 classes can be divided at present: (1) perforation unit/paster scheme, punching paster/paster, the structures such as loop antenna/paster and cross paster/paster by front distributed architecture.(2) pilotaxitic texture, as paster and oscillator/groove intertexture etc., the various feeding classification of integrated use.
But these two-band multi-polarization antennas above-mentioned are all adopt micro-strip paster antenna substantially, the problems such as the shortcoming of micro-strip paster antenna is that cross polarization is high, isolation between not same polarization is low, antenna efficiency is low.
Summary of the invention
In order to solve the weak point that above-mentioned two-band multipolarization common reflector exists, the invention provides one and using wave slot structure to realize two-band multipolarization Shared aperture Waveguide slot antenna completely.
The concrete technical scheme realizing above-mentioned purpose is as follows:
A kind of two-band multipolarization Shared aperture Waveguide slot antenna comprises the equal L-band vertical polarized antenna of length, C-band vertical polarized antenna and C-band horizontally-polarized antenna; And be Waveguide slot antenna; Described C-band vertical polarized antenna and C-band horizontally-polarized antenna composition C-band double polarized antenna are positioned at top, and L-band vertical polarized antenna is positioned at bottom; Described L-band vertical polarized antenna, C-band vertical polarized antenna and C-band horizontally-polarized antenna are all by coaxial connector at antenna wave guide tube hub feed, and coaxial connector and waveguide form 3dB power splitter; Realize the incentive action to L-band vertical polarized antenna, C-band vertical polarized antenna and C-band horizontally-polarized antenna.
The structural design scheme optimized is as follows:
Described L-band vertical polarized antenna is made up of the double ridged waveguide pipe 1 and the first coaxial connector 7 with the first broadside radiation longitudinal joint, the top of double ridged waveguide pipe 1 is laid with four the first broadside radiation longitudinal joints 4, the bottom centre of double ridged waveguide pipe 1 is located at by first coaxial connector 7, and the power splitter forming a T-shaped joint realizes feed;
Described C-band vertical polarized antenna is made up of the perpendicular polarization waveguide 2 of four closed at both ends, and described perpendicular polarization waveguide 2 is single ridged waveguides pipe, and the broadside center line both sides of every root perpendicular polarization waveguide 2 are laid with the second broadside radiation longitudinal joint 5; The following center of every root perpendicular polarization waveguide 2 is provided with the inner chamber that the second coaxial connector 8, second coaxial connector 8 stretches into double ridged waveguide pipe 1, and its outer conductor and medium contact with the diapire of double ridged waveguide pipe 1 inner chamber; Second coaxial connector 8 forms T-shaped structure with the second feed ridge in perpendicular polarization waveguide 2, forms a 3dB power splitter;
Described C-band horizontally-polarized antenna is made up of the horizontal polarization waveguide 3 of four closed at both ends, described horizontal polarization waveguide 3 is single ridged waveguides pipe, every root horizontal polarization waveguide 3 is laid with narrow limit radiation R-joining 6, and narrow limit radiation R-joining 6 is communicated with narrow limit, both sides; The following center of every root horizontal polarization waveguide 3 is provided with horizontal coaxial connector 9, three in four horizontal polarization waveguides 3 horizontal coaxial connectors 9 stretch into the inner chamber of double ridged waveguide pipe 1, and its outer conductor and medium contact with the diapire of double ridged waveguide pipe 1 inner chamber; Another horizontal coaxial connector 9 is positioned at the outside of double ridged waveguide pipe 1; Horizontal coaxial connector 9 forms T-shaped structure with the horizontal feed ridge of horizontal polarization waveguide 3, forms a 3dB power splitter.
Four perpendicular polarization waveguides 2 and four horizontal polarization waveguides 3, be staggered up and down, and the bottom surface of the end face of perpendicular polarization waveguide 2 and horizontal polarization waveguide 3 is in same level, forms C-band double polarized antenna;
Described L-band vertical polarized antenna is positioned at bottom C-band dual polarized antenna, and described four the first broadside radiation longitudinal joints 4 lay respectively between perpendicular polarization waveguide 2 and horizontal polarization waveguide 3.
Advantageous Effects of the present invention embodies in the following areas:
1, the present invention makes full use of the physical dimension carrying out contracting waveguide by adding ridge in waveguide, same physics aperture area achieves multiple Waveguide slot antenna and shares.Compared with the micro-band common reflector of two-band multipolarization, the advantages such as this antenna efficiency is high, polarization isolation is high, cross polarization is low, power capacity is large;
The efficiency of the antenna of the conventional micro-band forms of two-band multipolarization Shared aperture only has 60% usually, and in this programme, three kinds of antennas all adopt waveguiding structure form to realize.The advantage of radiating guide is that loss is little, and the efficiency of radiating guide can reach 75%, even 80%.Therefore efficiency is higher than the antenna efficiency of micro-band forms.Through processing test sample, this common reflector reaches 85% in the efficiency of C-band antenna, and L-band antenna efficiency reaches 80%;
The far field cross polarization of micro-band forms dual polarized antenna is generally about-20dB.Show for waveguiding structure form L/C common reflector test result in this programme, the far field cross polarization of C-band antenna is lower than-45dB, and the cross polarization of L-band Antenna Far Field is lower than-35dB, and cross polarization is far below micro-band forms dual polarized antenna;
Isolation between dual polarized antenna two polarization of conventional microstrip form only has about-20 dB.Polarization isolation in this programme between C-band dual polarized antenna is lower than-45dB;
2, the present invention utilizes the waveguide lower wall of C-band dual polarized antenna as cover plate at the upper surface of L-band antenna, does not increase extra structure, therefore compact conformation, alleviates the weight of whole antenna.The antenna of other two kinds of frequency ranges can separate machined, welds again, do not have the difficulty of processing of extra increase antenna after machining;
3, because this common reflector is two-band multipolarization, Antenna Operation therefore can be utilized at different frequency range and different polarization characteristic, increase the antijamming capability of antenna.Whole antenna all adopts waveguiding structure in addition, can use commaterial to make, and therefore whole common reflector has the identical coefficient of expansion, can be used as satellite antenna;
4, whole common reflector is waveguiding structure, and the bottom surface of antenna is the structure of level, and sound construction.Therefore can make full use of the floor panel structure of this waveguide antenna array as supporting bracket, make active equipment and antenna integrated integrated installation, the mounting panel of increase antenna that need not be extra, reduces the weight of whole system.
Accompanying drawing explanation
The overall appearance figure of Fig. 1 inventive antenna.
The vertical view of Fig. 2 inventive antenna.
The A-A cutaway view of Fig. 3 inventive antenna.
Fig. 4 C-band vertical polarized antenna of the present invention structural representation.
Fig. 5 C-band vertical polarized antenna of the present invention coaxial feed coordinates vertical view with perpendicular polarization waveguide 2.
The cooperation vertical view of Fig. 6 C-band vertical polarized antenna of the present invention group battle array and L-band vertical polarized antenna.
Fig. 7 C-band horizontally-polarized antenna of the present invention structural representation.
Fig. 8 C-band horizontally-polarized antenna of the present invention coaxial feed coordinates vertical view with horizontal polarization waveguide 3.
Fig. 9 C-band horizontally-polarized antenna of the present invention end view.
Figure 10 C-band horizontally-polarized antenna of the present invention group battle array schematic diagram.
Figure 11 common reflector waveguide feed of the present invention end view.
Figure 12 L-band vertical polarized antenna of the present invention input port reflection coefficient schematic diagram.
Figure 13 C-band vertical polarized antenna of the present invention input port reflection coefficient schematic diagram.
Figure 14 C-band horizontally-polarized antenna of the present invention input port reflection coefficient schematic diagram.
The directional diagram of Figure 15 L-band vertical polarized antenna of the present invention horizontal plane and vertical plane and cross polarization thereof.
The directional diagram of Figure 16 C-band vertical polarized antenna of the present invention horizontal plane and vertical plane and cross polarization thereof.
The directional diagram of Figure 17 C-band horizontally-polarized antenna of the present invention horizontal plane and vertical plane and cross polarization thereof.
Sequence number in Fig. 1-11: double ridged waveguide pipe 1, perpendicular polarization waveguide 2, horizontal polarization waveguide 3, first broadside radiation longitudinal joint 4, second broadside radiation longitudinal joint 5, narrow limit radiation R-joining 6, first coaxial connector 7, second coaxial connector 8, horizontal coaxial connector 9.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment 1:
See Fig. 1, Fig. 2, Fig. 3, a kind of two-band multipolarization Shared aperture Waveguide slot antenna comprises the equal L-band vertical polarized antenna of length, C-band vertical polarized antenna and C-band horizontally-polarized antenna; C-band vertical polarized antenna is C-band perpendicular polarization Waveguide slot antenna; C-band horizontally-polarized antenna is C-band horizontal polarization Waveguide slot antenna.
See Fig. 6, L-band vertical polarized antenna is made up of the double ridged waveguide pipe 1 and the first coaxial connector 7 with the first broadside radiation longitudinal joint; Two ridges of double ridged waveguide pipe 1 are positioned at waveguide center line both sides, equal with the distance of center line; The top of double ridged waveguide pipe 1 is uniform offers the bottom centre that four the first broadside radiation longitudinal joint 4, first coaxial connectors 7 are installed on double ridged waveguide pipe 1, and the power splitter forming a T-shaped joint realizes feed, as shown in figure 11.See Fig. 3, the roof of double ridged waveguide pipe 1 is provided with three raised lines of outwardly convex, and between adjacent raised line and the outside of both sides raised line forms four grooves.L-band vertical polarized antenna as shown in Figure 3.
See Fig. 4 and Fig. 5; C-band vertical polarized antenna is made up of the perpendicular polarization waveguide 2 of four closed at both ends, and perpendicular polarization waveguide 2 is single ridged waveguides pipe, and see Fig. 4, the broadside center line both sides of every root perpendicular polarization waveguide 2 are uniform offers the second broadside radiation longitudinal joint 5.See Fig. 5, the following center of every root perpendicular polarization waveguide 2 is provided with the inner chamber that the second coaxial connector 8, second coaxial connector 8 stretches into double ridged waveguide pipe 1, and its outer conductor and medium contact with the diapire of double ridged waveguide pipe 1 inner chamber; Second coaxial connector 8 forms T-shaped structure with the second feed ridge in perpendicular polarization waveguide 2, forms a 3dB power splitter.
See Fig. 7, Fig. 8, Fig. 9 and Figure 10, C-band horizontally-polarized antenna is made up of the horizontal polarization waveguide 3 of four closed at both ends, horizontal polarization waveguide 3 is single ridged waveguides pipe, uniformly on every root horizontal polarization waveguide 3 offer narrow limit radiation R-joining 6, narrow limit radiation R-joining 6 is communicated with narrow limit, both sides, and narrow limit radiation R-joining 6 is in oblique " eight " shape.The following center of every root horizontal polarization waveguide 3 is provided with horizontal coaxial connector 9; Three in four horizontal polarization waveguides 3 horizontal coaxial connectors 9 stretch into the inner chamber of double ridged waveguide pipe 1, and its outer conductor and medium contact with the diapire of double ridged waveguide pipe 1 inner chamber; The horizontal coaxial connector 9 of another root is positioned at the outside of double ridged waveguide pipe 1; Horizontal coaxial connector 9 forms T-shaped structure with the horizontal feed ridge of horizontal polarization waveguide 3, forms a 3dB power splitter.
See Fig. 6, four perpendicular polarization waveguides 2 are arranged in parallel, respectively corresponding four grooves being positioned at double ridged waveguide pipe 1, and the end face of three raised lines of the end face of four perpendicular polarization waveguides 2 and double ridged waveguide pipe 1 is in a plane; The ridge of four perpendicular polarization waveguides 2 is identical with the direction of two vallates in double ridged waveguide pipe 1 pipe, sees Fig. 3;
See Figure 10, four horizontal polarization waveguides 3 are arranged in parallel, and wherein three horizontal polarization waveguides 3 lay respectively at the top of three raised lines of double ridged waveguide pipe 1, and another root horizontal polarization waveguide 3 is positioned at the outside of double ridged waveguide pipe 1; See Fig. 3, four perpendicular polarization waveguides 2 and four horizontal polarization waveguides 3 form version staggered up and down, and the bottom surface of the end face of perpendicular polarization waveguide 2 and horizontal polarization waveguide 3 is in same level, forms C-band double polarized antenna; The direction of two vallates in the ridge in horizontal polarization waveguide 3 and double ridged waveguide pipe 1 is contrary.The adjacent cells spacing of same waveguide is equal.
See Fig. 3 and Fig. 6, L-band vertical polarized antenna is positioned at bottom C-band dual polarized antenna, and four the first broadside radiation longitudinal joints 4 lay respectively between perpendicular polarization waveguide 2 and horizontal polarization waveguide 3.
First coaxial connector 7, second coaxial connector 8 and horizontal coaxial connector 9 are preferably the SMA head coaxial connector of 50 ohm.Second coaxial connector 8 of C-band double polarized antenna and horizontal coaxial connector 9 need to be each passed through the inner chamber of double ridged waveguide pipe 1 as shown in Figure 3, and the second coaxial connector 8 and the inner wire of horizontal coaxial connector 9 go deep into being connected with the surface of waveguide cavities in double ridged waveguide pipe 1.Connector and feed waveguide form the power splitter that T-shaped structure realizes 3dB.First coaxial connector 7 of L-band vertical polarized antenna gos deep into the power splitter realizing 3dB in double ridged waveguide pipe 1, as shown in figure 11.
Design parameter is as follows:
According to operating frequency range, the spatial dimensions such as antenna space scan angle, determine the unit interval of Waveguide slot antenna unit on horizontal plane and vertical plane.In the design, radiating slot unit interval is not to occur that graing lobe limits for condition.
The double ridged waveguide pipe 1 of above-mentioned L-band vertical polarized antenna is closed at both ends, centre feed.See Fig. 6, the first broadside radiating slot 4 contiguous with closed at both ends end and the spacing of double ridged waveguide pipe 1 blind end are Lsh1=0.25
.The length of the first broadside radiating slot 4 is Ls1=0.5
, the center distance of adjacent first broadside radiation longitudinal joint 4 is L1=0.5
, gap width w1 is 2mm.Wherein
for the free space wavelength that L-band operating frequency of antenna is corresponding,
for the guide wavelength of the double ridged waveguide pipe 1 of L-band vertical polarized antenna.Double ridged waveguide pipe 1 has four the first broadside radiation longitudinal joints 4.Being biased of first broadside radiation longitudinal joint 4 is relevant with the number in gap, and due in this programme, the biased a1 of L-band antenna slots has strictly been limited between the gap of C-band dual polarized antenna, and therefore the position of L-band radiating slot is immutable.Admittance value can be regulated to realize the resonance of the first broadside radiation longitudinal joint 4 by opening multiple gap between C-band dual polarized antenna.
The perpendicular polarization waveguide 2 of above-mentioned C-band vertical polarized antenna is closed at both ends equally, centre feed.See Fig. 5, the distance in the second broadside radiation longitudinal joint 5 centre-to-centre spacing short circuit face at perpendicular polarization waveguide 2 two ends is Lsh2=0.25
, unit interval is chosen as L2=0.5
, radiating slot length Ls2=0.5
, width w2 is 2mm.Wherein
for the free space wavelength that C-band vertical polarized antenna operating frequency is corresponding,
for the guide wavelength of the perpendicular polarization waveguide 2 of C-band vertical polarized antenna.Perpendicular polarization waveguide 2 has 16 longitudinal slots.The biased a2 of the second broadside radiation longitudinal joint 5 is relevant with the number in gap, and as shown in Figure 6, general a2 gets 0 ~ k2/2, and wherein k2 is the broadside size of perpendicular polarization waveguide 2, as shown in Figure 5.
The horizontal polarization waveguide 3 of above-mentioned C-band horizontally-polarized antenna is closed at both ends equally, centre feed.See Fig. 8 and Fig. 9, the narrow limit radiation R-joining 6 contiguous with blind end and the spacing Lsh3=0.25 in feed waveguide short circuit face
, the unit interval L3=0.5 of narrow limit radiation R-joining 6
, narrow limit radiation R-joining 6 is by the incision of narrow limit, and long is t=0.16
, stitch wide w3=2mm.Wherein
for the free space wavelength that C-band horizontally-polarized antenna operating frequency is corresponding,
for the guide wavelength of the horizontal polarization waveguide 3 of C-band horizontally-polarized antenna.The inclination angle in gap
.The size at inclination angle and the number in gap have relation.Horizontal polarization waveguide 3 has 16 inclined slots in this example.The incline direction of adjacent slits is contrary, but inclination angle is identical, inclination angle in this example
.
In the present embodiment, the physical dimension of three kinds of ridge waveguides is specifically positioned at according to waveguide cutoff frequency that the lower side frequency of 0.8 times of working band determines.The method is known by this professional designer.C-band vertical polarized antenna, the present embodiment is preferably: L5=0.26
0, L6=0.23
0, L7=0.19
0, L8=0.15
0, C-band horizontally-polarized antenna, the present embodiment is preferably: L15=0.3
0, L16=0.24
0, L17=0.04
0, L4=0.2
0, the unit interval L9=0.69 of dual polarized antenna
0.L-band vertical polarized antenna, the present embodiment is preferably: L10=0.14
0, L11=0.04
0, L12=0.09
0, L13=0.59
0, L14=0.09
0as shown in Figure 3.
Figure 12 gives the curve of S11 parameter with frequency change of L-band antenna linear array.Figure 13 and Figure 14 sets forth the curve of S11 parameter with frequency change of C-band vertical polarized antenna and horizontally-polarized antenna.Figure 15, Figure 16, Figure 17 sets forth C-band vertical polarized antenna, horizontally-polarized antenna, L-band vertical polarized antenna at horizontal plane and vertical plane and cross-polarized directional diagram thereof.
Embodiment 2:
See Fig. 1, Fig. 6, Figure 10, work in the two-band multipolarization common reflector battle array of L-band and C-band.L-band antenna is made up of the Waveguide slot antenna linear array of Unit 1 × 4.C-band dual polarized antenna is respectively by the wave guide slot array antenna of Unit 4 × 16, and antenna array is made up of 4 C-band Waveguide slot linear arrays.Each unit linear array is made up of 16 gaps.The waveguide of L-band antenna is positioned at the below of C-band dual polarized antenna waveguide.In the present embodiment, the spacing of L-band antenna slots is L1=0.5
as shown in Figure 6.Unit interval Ld2=0.7 between C-band vertical polarized antenna linear array
as shown in Figure 6, the unit interval Ld3=0.7 between C-band horizontally-polarized antenna linear array
as shown in Figure 10, this submatrix is connected with T/R assembly, is aided with the active phase array antenna that power supply, ripple control and mounting structure etc. can be extended to large-scale Subarray.
The other the same as in Example 1.
Above content elaborated to the present invention in conjunction with concrete preferred implementation, can not assert that the present invention specifically implements to be only limitted to these explanations.For the technical staff of technical field that the present invention belongs to; without departing from the inventive concept of the premise; some simple deductions and replacement can also be made; as encouraged gap, merit aperture to carry out radiation by other feeding classification, all should be considered as belonging to the invention protection range that the present invention is determined by submitted to claims.
Claims (6)
1. a two-band multipolarization Shared aperture Waveguide slot antenna, is characterized in that: comprise the equal L-band vertical polarized antenna of length, C-band vertical polarized antenna and C-band horizontally-polarized antenna; And be Waveguide slot antenna; Described C-band vertical polarized antenna and C-band horizontally-polarized antenna composition C-band double polarized antenna are positioned at top, and L-band vertical polarized antenna is positioned at bottom; Described L-band vertical polarized antenna, C-band vertical polarized antenna and C-band horizontally-polarized antenna are all by coaxial connector at antenna wave guide tube hub feed, and coaxial connector and waveguide form 3dB power splitter; Realize the incentive action to L-band vertical polarized antenna, C-band vertical polarized antenna and C-band horizontally-polarized antenna.
2. a kind of two-band multipolarization Shared aperture Waveguide slot antenna according to claim 1, it is characterized in that: described L-band vertical polarized antenna is made up of the double ridged waveguide pipe (1) and the first coaxial connector (7) with the first broadside radiation longitudinal joint, the top of double ridged waveguide pipe (1) is laid with four the first broadside radiation longitudinal joints (4), the bottom centre of double ridged waveguide pipe (1) is located at by first coaxial connector (7), and the power splitter forming a T-shaped joint realizes feed;
Described C-band vertical polarized antenna is made up of the perpendicular polarization waveguide (2) of four closed at both ends, described perpendicular polarization waveguide (2) is single ridged waveguides pipe, and the broadside center line both sides of every root perpendicular polarization waveguide (2) are laid with the second broadside radiation longitudinal joint (5); The following center of every root perpendicular polarization waveguide (2) is provided with the second coaxial connector (8), and the second coaxial connector (8) stretches into the inner chamber of double ridged waveguide pipe (1), and its outer conductor and medium contact with the diapire of double ridged waveguide pipe (1) inner chamber; Second coaxial connector (8) forms T-shaped structure with the second feed ridge in perpendicular polarization waveguide (2), forms a 3dB power splitter;
Described C-band horizontally-polarized antenna is made up of the horizontal polarization waveguide (3) of four closed at both ends, described horizontal polarization waveguide (3) is single ridged waveguides pipe, every root horizontal polarization waveguide (3) is laid with narrow limit radiation R-joining (6), and narrow limit radiation R-joining (6) is communicated with narrow limit, both sides; The following center of every root horizontal polarization waveguide (3) is provided with horizontal coaxial connector (9), three horizontal coaxial connectors (9) in four horizontal polarization waveguides (3) stretch into the inner chamber of double ridged waveguide pipe (1), and its outer conductor and medium contact with the diapire of double ridged waveguide pipe (1) inner chamber; The horizontal coaxial connector of another root (9) is positioned at the outside of double ridged waveguide pipe (1); Horizontal coaxial connector (9) forms T-shaped structure with the horizontal feed ridge of horizontal polarization waveguide (3), forms a 3dB power splitter;
Described four perpendicular polarization waveguides (2) and four horizontal polarization waveguides (3), be staggered up and down, and the bottom surface of the end face of perpendicular polarization waveguide (2) and horizontal polarization waveguide (3) is in same level, forms C-band double polarized antenna;
Described L-band vertical polarized antenna is positioned at bottom C-band dual polarized antenna, and described four the first broadside radiation longitudinal joints (4) lay respectively between perpendicular polarization waveguide (2) and horizontal polarization waveguide (3).
3. a kind of two-band multipolarization Shared aperture Waveguide slot antenna according to claim 2, it is characterized in that: the roof of described double ridged waveguide pipe (1) is provided with three raised lines of outwardly convex, between adjacent raised line and the outside of both sides raised line forms four grooves;
Described four perpendicular polarization waveguides (2) are arranged in parallel, and correspondence is positioned at four grooves of double ridged waveguide pipe (1) respectively, and the end face of three raised lines of the end face of four perpendicular polarization waveguides (2) and double ridged waveguide pipe (1) is in a plane; The ridge of four perpendicular polarization waveguides (2) is identical with the direction of two vallates in double ridged waveguide pipe (1) pipe;
Described four horizontal polarization waveguides (3) are arranged in parallel, and wherein three horizontal polarization waveguides (3) lay respectively at the top of three raised lines of double ridged waveguide pipe (1), and another root horizontal polarization waveguide (3) is positioned at the outside of double ridged waveguide pipe (1); Four perpendicular polarization waveguides (2) and four horizontal polarization waveguides (3) form version staggered up and down; The direction of two vallates in the ridge in horizontal polarization waveguide (3) and double ridged waveguide pipe (1) is contrary.
4. a kind of two-band multipolarization Shared aperture Waveguide slot antenna according to claim 2, is characterized in that: in described double ridged waveguide pipe (1), the cross section of two vallates is rectangle, and ridge height L12 is 0.09
0, the wide L11 of ridge is 0.14
0; The distance L10 of the two side of the outer lateral extent double ridged waveguide pipe (1) of two vallates is 0.14
0; The length Ls1 of described first broadside radiation longitudinal joint (4) is 0.5
, Lsh1 is 0.25
, the first broadside radiation longitudinal joint (4) two slit centers spacing L1 is 0.5
, the width w1 of the first broadside radiation longitudinal joint (4) is 2mm; Wherein
0for the free space wavelength that L-band operating frequency of antenna is corresponding,
for the guide wavelength of L-band antenna double ridged waveguide pipe (1).
5. a kind of two-band multipolarization Shared aperture Waveguide slot antenna according to claim 2, is characterized in that: the height L6 of described perpendicular polarization waveguide (2) is 0.23
0, width L5 is 0.26
0; The height L7 of its ridge is 0.19
0, the width L8 of ridge is 0.15
0; The long Ls2 of seam of described second broadside radiation longitudinal joint (5) is 0.5
, stitching wide w2 is 2mm, and the spacing L2 between adjacent seam is 0.5
, the spacing Lsh2 between the mid point of the second broadside radiation longitudinal joint (5) adjacent with blind end and perpendicular polarization waveguide (2) short circuit face is 0.25
; Described
0for free space wavelength corresponding when C-band vertical polarized antenna works,
for the guide wavelength of C-band antennas orthogonal polarized wave conduit (2).
6. a kind of two-band multipolarization Shared aperture Waveguide slot antenna according to claim 2, is characterized in that: the height L16 of described horizontal polarization waveguide (3) is 0.24
0, width L15 is 0.3
0; The height L4 of its ridge is 0.2
0, the width L17 of ridge is 0.04
0; Spacing Lsh3 between the mid point of the narrow limit radiation R-joining (6) adjacent with blind end and horizontal polarization waveguide (3) short circuit face is 0.25
, the spacing L3 between adjacent narrow edge radiation R-joining (6) is 0.69
0, narrow limit radiation R-joining (6) is by the incision of narrow limit, and length t is 0.16
0, the width w3 of narrow limit radiation R-joining (6) is 1mm; Described
0for free space wavelength corresponding when C-band horizontally-polarized antenna works,
for the guide wavelength of C-band antenna horizontal polarization waveguide (3).
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| CN105762522A (en) * | 2016-04-08 | 2016-07-13 | 东南大学 | Grating slit earth capacitor-loaded stepped impedance tri-polarization slot antenna |
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| CN108321553A (en) * | 2018-04-02 | 2018-07-24 | 珠海纳睿达科技有限公司 | Dual polarization Waveguide slot array antenna |
| CN108321553B (en) * | 2018-04-02 | 2024-03-19 | 广东纳睿雷达科技股份有限公司 | Dual polarized waveguide split array antenna |
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| CN109713455B (en) * | 2018-12-20 | 2020-07-24 | 中国电子科技集团公司第三十八研究所 | Dual-frequency common-caliber waveguide slot antenna |
| CN110867644B (en) * | 2019-11-11 | 2021-01-19 | 中国电子科技集团公司第十四研究所 | Dual-band multi-polarization common-caliber coaxial waveguide slot antenna |
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| CN113922061A (en) * | 2021-10-12 | 2022-01-11 | 上海无线电设备研究所 | Common-caliber co-polarized dual-frequency waveguide slot antenna |
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