CN1747234A - Double-frequency planar antenna of wireless network device - Google Patents
Double-frequency planar antenna of wireless network device Download PDFInfo
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- CN1747234A CN1747234A CN 200410074518 CN200410074518A CN1747234A CN 1747234 A CN1747234 A CN 1747234A CN 200410074518 CN200410074518 CN 200410074518 CN 200410074518 A CN200410074518 A CN 200410074518A CN 1747234 A CN1747234 A CN 1747234A
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- radio network
- network device
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- planar antenna
- frequency
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention comprises a first surface and a second surface. A feed-in microstrip line is mounted on the first surface, and feed-in point is located at one end of it. A first metal loop is mounted on the first surface, and connects to feed-in point of feed-in microstrip line via first middle line. A second metal loop is mounted in first surface and connects to the feed-in point of feed-in microstrip line via second middle line. a theta angle is formed between first metal loop and second metal loop. A ground plane is located at lower half of second surface, and doesn't cover first metal loop, second metal loop, first middle line and second middle line.
Description
Technical field
The present invention relates to a kind of double-frequency planar antenna of radio network device, particularly about a kind of use at the transmission of WLAN (WLAN) or the double-frequency planar antenna on the receiving system.
Background technology
Because computer and wireless communication technology prosperity, WLAN (Wireless LAN) is widely used gradually, also be built in the computer industry in chipset or the motherboard,, advocate exactly and can get online without being tethered to a cable whenever and wherever possible as the mobile computer of the Centrino type of Intel.
And in known technology, the patent of existing many radio antennas, as United States Patent (USP) the 6th, 166, No. 694 Printed twin spiral dual band antenna, be translated into " printing double-rotation type dual-band antenna ", it is to disclose a kind of antenna assembly that is used on the wireless communication system, comprises printed circuit board (PCB), and the interface board surface mount is in this printed circuit board (PCB), and antenna is printed on the dielectric substrate, is attached to this printed circuit board (PCB) with surface mount technology again.Suitable complexity and cost costliness on making, and its shared space is quite big, and be not suitable for the little requirement of electronic product volume now.
United States Patent (USP) the 6th, 008, No. 774 " Printed antenna structure for wireless datacommunications " can be translated into " the printed antenna structure of RFDC ", be to disclose a kind of mobile computer of WLAN or printing type aerial on the portable communications product of being used for, comprise a printed circuit board (PCB), one hook-shaped radiation metal wires, be printed on the upper surface of printed circuit board (PCB), it is online that load point is connected in this hook-shaped radiation metal, and ground plane, be printed on the lower surface of this printed circuit board (PCB).
With respect to the former, this invention is characterised in that this antenna is to be printed on the peripheral cards (Peripheral Card), can be directly and the circuit system on the peripheral cards integrate, yet this antenna only limits the use of the WLAN system frequency range under the 2.4GHz single band.
Many on the antenna of the wireless network khaki inside that therefore, each electronic product was equipped with at present has the single band operational capacity.So, increase gradually along with market, the antenna of configuration is if only have the wireless network card of single frequency operation ability, and its ability to work and the market competitiveness will be not enough, but therefore the wireless network card antenna of development dual frequency operation will be the main flow trend of associated electrical product.Though the existing device that can be used for dual frequency operation of existing technology, yet antenna must consider that antenna respectively forms the correlation of assembly when adjusting working frequency, be suitable complexity in the use.
In addition since present electronic product all with light, thin, short, little designs, so the volume of expected radio network device will have gently, approach, little characteristic and outward appearance.In this case, the antenna volume that is configured in radio network device inside also will be limited within limits.
This case invention people is a demand of reaching above-mentioned antenna, and the existing antenna of solution can't be carried out the inconvenience and the shortcoming of dual frequency operation pattern, a kind of double-frequency planar antenna of radio network device is proposed, can carry out dual frequency operation easily, and be fit to be applied to WLAN system, and have the characteristic light, thin, that area is little, therefore meet the requirement of electronic product volume-diminished now.
Summary of the invention
Main purpose of the present invention is to provide a kind of flat plane antenna that uses on Wireless LAN device, can carry out the operator scheme at two kinds of frequency bands easily, and has the characteristic light, thin, that area is little.
For reaching above-mentioned purpose, the present invention mainly provides a kind of double-frequency planar antenna of radio network device, comprises that a substrate has first surface and second surface.The feed-in microstrip line is equipped on first surface, and an end is provided with load point.The circulation of first metal is equipped on the first surface, connects the load point of first mid line to the feed-in microstrip line.The circulation of second metal is equipped on this first surface, connects the load point of second mid line to the feed-in microstrip line.First mid line and second mid line are to form a θ angle, perhaps apart can be greater than a spacing distance between circulation of first metal and the circulation of second metal.Ground plane is arranged on the Lower Half on the second surface, and is not encompassed in the zone of the circulation of first metal, the circulation of second metal, first mid line and second mid line.
The present invention also provides a kind of double-frequency planar antenna of radio network device, comprises that a substrate has first surface and second surface.The feed-in microstrip line is equipped on this first surface, and an end is provided with load point.The one Y type metal wire is equipped on this first surface, connects the load point of first mid line to the feed-in microstrip line.The 2nd Y type metal wire is equipped on the first surface, connects the load point of second mid line to the feed-in microstrip line.First mid line and second mid line are to form a θ angle, perhaps apart can be greater than a spacing distance between circulation of first metal and the circulation of second metal.Ground plane is arranged on the Lower Half on the second surface, and is not encompassed in the zone of first horizontal metal wire, second horizontal metal wire and mid line.
Description of drawings
Fig. 1 is the first embodiment schematic perspective view of double-frequency planar antenna of the present invention;
Fig. 2 is the reflection loss measurement figure of first embodiment of the invention;
Fig. 3 is the radiation pattern figure of first embodiment of the invention antenna operation in 2.45GHz;
Fig. 4 is the radiation pattern figure of first embodiment of the invention antenna operation in 5.2GHz;
Fig. 5 is the gain diagram of first embodiment of the invention antenna operation in the 2.45GHz frequency band;
Fig. 6 is the gain diagram of first embodiment of the invention antenna operation in the 5.2GHz frequency band;
Fig. 7 is a second embodiment of the present invention schematic perspective view;
Fig. 8 is the reflection loss measurement figure of second embodiment of the invention;
Fig. 9 is the radiation pattern figure of second embodiment of the invention antenna operation in 2.45GHz;
Figure 10 is the radiation pattern figure of second embodiment of the invention antenna operation in 5.2GHz;
Figure 11 is the gain diagram of second embodiment of the invention antenna operation in the 2.45GHz frequency band; And
Figure 12 is the gain diagram of second embodiment of the invention antenna operation in the 5.2GHz frequency band.
The figure number explanation
10 flat plane antennas, 11 substrates
12 first surfaces, 13 second surfaces
14 feed-in microstrip lines, 15 load points
The circulate 17 second metals circulation of 16 first metals
18 first mid lines, 19 second mid lines
20 ground planes, 30 flat plane antennas
31 substrates, 32 first surfaces
33 second surfaces, 34 feed-in microstrip lines
35 load points 36 a Y type metal wire
37 the 2nd Y type metal wires, 38 first mid lines
39 second mid lines, 40 ground planes
Embodiment
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature, can be goed deep into thus and concrete understanding, yet accompanying drawing only provide with reference to and explanation usefulness, be not to be used for to the present invention's limitr in addition.
As shown in Figure 1, it is the first embodiment schematic perspective view for double-frequency planar antenna of the present invention, the double-frequency planar antenna of radio network device of the present invention mainly is to use on radio network device, as WAP (wireless access point) (Wireless Access Point), wireless network card (Wireless LAN Card), wireless network router (Wireless Router) or radio network netgate device (Wireless Gateway) ... or the like, the standard that can meet wireless zone circuit IEEE 802.11a, 11b and 11g is operable in the double frequency band aerial of 2.45GHz and 5.2GHz.
Flat plane antenna 10 of the present invention mainly comprises substrate 11, has first surface 12 and second surface 13.Be provided with feed-in microstrip line (Microstrip Line) 14 on first surface 12, it has 50 ohm of characteristic impedances, in order to transmission signals.One end of feed-in microstrip line 14 is provided with a load point 15, and also is provided with first metal circulation, the 16 and second metal circular route 17 on this first surface 12.
Wherein first metal circulation, 16 and second metal circulation 17 is that mode with printed circuit board (PCB) is printed on the first surface 12, and first metal circulation 16 is to connect the load point 15 of first mid line 18 to feed-in microstrip line 14.Second metal circulation 17 also connects second mid line 19 to load point 15.First mid line 18 and second mid line 19 are to form a θ angle, and this θ angle can be 30 °～180 °, and perhaps making first metal circulate 17 of 16 and second metal circulations apart can be greater than spacing distance, and this spacing distance can be 2.1mm.
Second surface 13 is provided with ground plane 20 in addition, similarly, ground plane 20 also is printed on the second surface 13 in the mode of printed circuit board (PCB), and ground plane 20 is the earthing potential ends that are connected in radio network device, be arranged on the Lower Half of second surface 13, and be not encompassed in the zone of first metal circulation, 16, second metal circulation 17, first mid line 18 and second mid line 19.
Substrate 11 sizes of first embodiment can be 51.5 * 100mm
2Circuit board constitute, and material can be the printed circuit board (PCB) that glass fiber-reinforced BT (Bismaleimide-triazine) resin or FR4 glass reinforced epoxy (FIBERGLASS Reinforce Epoxy Resin) are made, the pliability sheet substrate of also can polyimides (Polyimide) making (Flexible Film Substrate), also can be the iron dragon not that has a superperformance at high frequency, as the ceramic substrate of aluminium oxide or magnesium titanate.
The load point 15 of the present invention by feed-in microstrip line 14 forms the courses of action of first resonance circuit through first mid line, 18 to first metal circular routes 16, first (lower) frequency of operation of decision antenna, as be 2.45GHz.And circulate 17 through second mid line, 19 to second metals by load point 15, and form the courses of action of second resonance circuit, second (higher) frequency of operation of decision antenna, as be 5.2GHz.
The prior art that compares must be considered the correlation of respectively using assembly when the decision dual frequency operation, flat plane antenna of the present invention can be reached the frequency band of two resonance modes easily by the size of adjusting this first metal circular route 16 and this second metal circulation 17.
As shown in Figure 2, be reflection loss (Return Loss) the measurement figure of first embodiment of the invention, the flat plane antenna 10 of first embodiment is to use relative dielectric constant 4.3, the substrate 11 of thickness 0.7mm, and area is 11.7 * 11.7mm
2Antenna and 5.7 * 5.7mm
2Antenna measure, the length and width of this first metal circulation 16 are all 11.7mm, the inner length and width of circulation are all 2.7mm, and the length and width of this second metal circulation 17 are all 5.7mm, the inner length and width of circulation then are all 1.7mm.
10dB returns under the definition of loss (Return Lose) impedance frequency range as shown in Figure 2, can find out that this flat plane antenna 10 is between 2169MHz～2656MHz at the measurement of first frequency of operation, frequency range (Bandwidth) is 487MHz, its measuring point 1 on the frequency band of 2.43125GHz, to have-20.37dB return loss.And be between 4900MHz～5619MH at the measurement of second frequency of operation, frequency range is 719MHz, its measuring point 2 be on the 5.3GHz frequency band, have-22.59dB return loss.Therefore to can be the WLAN that operates in 2.45GHz and 5.2GHz two-band be the frequency range demand of uniting to flat plane antenna 10 of the present invention.
As shown in Figures 3 and 4, be radiation pattern (Pattern) figure that first embodiment of the invention flat plane antenna 10 operates in 2.45GHz and 5.2GHz respectively.And gain (Gain) figure in the WLAN system of Fig. 5 and Fig. 6 to be first embodiment of the invention flat plane antenna 10 operate in respectively 2.45GHz and 5.2GHz frequency band.In the 2.45GHz frequency band, the peak value of antenna gain is 3.62dBi, and mean value is-1.09dBi.And in the 5.2GHz frequency band, the peak value of antenna gain is 3.52dBi, and mean value is-1.39dBi.Be presented in first and second operation mode, this flat plane antenna 10 all has quite good gain.
Be second embodiment of the present invention schematic perspective view as shown in Figure 7.The flat plane antenna 30 of second embodiment of the invention mainly comprises: substrate 31 has first surface 32 and second surface 33.One feed-in microstrip line 34 is arranged on first surface 32, and an end of this feed-in microstrip line 34 is provided with a load point 35.And on first surface 32, also be provided with a Y type metal wire 36 and the 2nd Y type metal wire 37.
The one Y type metal wire 36 is to connect the load point 35 of first mid line 38 to feed-in microstrip line 34.The 2nd Y type metal wire 37 also connects second mid line 39 to load point 35.First mid line 38 and second mid line 39 form a θ angle, and this θ angle can be 30 °～180 °, forms two Y fonts.Perhaps 37 of a Y type metal wire 36 and the 2nd Y type metal wires apart can be greater than spacing distances, and spacing distance can be 2.1mm.
The load point 35 of the present invention by feed-in microstrip line 34 forms the courses of action of first resonance circuit through first mid line, 38 to the one Y type metal wires 36, first (lower) frequency of operation of decision antenna, as be 2.45GHz.And by load point 35 through second mid line, 39 to the 2nd Y type metal wires 37, form the courses of action of second resonance circuit, second (higher) frequency of operation of decision antenna as is 5.2GHz.
As shown in Figure 8, be that the reflection loss (Return Loss) of second embodiment of the invention measures figure, the flat plane antenna 30 of this second embodiment is to use relative dielectric constant 4.3, the substrate 31 of thickness 0.7mm, and area is 12 * 12mm
2Antenna and 8.2 * 8.2mm
2Antenna measure, the live width of a Y type metal wire 36 is 7.5mm, length is 12mm, and is an orthogonal type shape of opening to the right, and the live width of the 2nd Y type metal wire 37 is 2.mm, length is 8.2mm, and is an orthogonal type shape of opening left.
Be that 10dB returns under the definition of loss (Return Lose) impedance frequency range as shown in Figure 8, can find out that flat plane antenna 30 is between 2281MHz～2713MHz at the measurement of first frequency of operation, frequency range (Bandwidth) is 432MHz, its measuring point 1 be on the frequency band of 2.4875GHz, have-27.65dB return loss, and be between 4981MHz～5506MH at the measurement of second frequency of operation, frequency range is 525MHz, its measuring point 2 be on the frequency band of 5.3GHz, have-15.46dB return loss, therefore flat plane antenna 30 of the present invention can be the WLAN system frequency range demand that operates in 2.45GHz and 5.2GHz two-band.
As Fig. 9 and shown in Figure 10, operate in radiation pattern (Pattern) figure of 2.45GHz and 5.2GHz respectively for second embodiment of the invention flat plane antenna 30; And gain (Gain) figure in the WLAN system of Figure 11 and Figure 12 to be second embodiment of the invention flat plane antenna 30 operate in respectively 2.45GHz and 5.2GHz frequency band.In the 2.45GHz frequency band, the peak value of antenna gain is 3.77dBi, and mean value is-1.23dBi, and in the 5.2GHz frequency band, the peak value of antenna gain is 3.31dBi, and mean value is-1.45dBi, be presented in first and second operation mode, this flat plane antenna 30 all has quite good gain.
Be familiar with this operator and can know from experience the modification that the present invention may be used in a lot of forms, structure, layout, ratio material, assembly and assembly.Therefore, embodiment as herein described and all viewpoints should be regarded as in order to explanation the present invention, but not in order to restriction the present invention.Scope of the present invention should be by defining in the claim.
Claims (20)
1. the double-frequency planar antenna of a radio network device is to use the antenna that can operate in double frequency-band on radio network device, it is characterized in that comprising:
One substrate has first surface and second surface;
One feed-in microstrip line is equipped on first surface, and an end is provided with a load point;
The circulation of one first metal is equipped on the first surface, connects the load point of first mid line to this feed-in microstrip line;
The circulation of one second metal, be equipped on the first surface, connect the load point of second mid line, and this first mid line and second mid line be to form a θ angle to this feed-in microstrip line, perhaps apart can be between this first metal circulation and the circulation of second metal greater than a spacing distance; And
One ground plane is arranged on the Lower Half on the second surface, and is not encompassed in the zone of the circulation of first metal, the circulation of second metal, first mid line and second mid line.
2. the double-frequency planar antenna of radio network device as claimed in claim 1, it is characterized in that: this radio network device is to be WAP (wireless access point), wireless network card, wireless network router or radio network netgate device.
3. as the double-frequency planar antenna of claim 1 a described radio network device, it is characterized in that: by the load point of feed-in microstrip line through first mid line to the first metal circular route, form the courses of action of first resonance circuit, first (lower) frequency of operation of decision antenna.
4. the double-frequency planar antenna of radio network device as claimed in claim 1 is characterized in that: circulated through second mid line to the second metal by load point, form the courses of action of second resonance circuit, second (higher) frequency of operation of decision antenna.
5. the double-frequency planar antenna of radio network device as claimed in claim 1, it is characterized in that: the feed-in microstrip line is to have 50 ohm of characteristic impedances, in order to transmission signals.
6. the double-frequency planar antenna of radio network device as claimed in claim 1, it is characterized in that: this θ angle can be 30 °～180 °.
7. the double-frequency planar antenna of radio network device as claimed in claim 1 is characterized in that: spacing distance needs greater than 2.1mm.
8. the double-frequency planar antenna of radio network device as claimed in claim 1 is characterized in that: feed-in microstrip line, the circulation of first metal, the circulation of second metal, first mid line, second mid line and ground plane are that the mode with printed circuit board (PCB) is printed on this substrate.
9. the double-frequency planar antenna of radio network device as claimed in claim 1, it is characterized in that: ground plane is the earthing potential end that can be connected in radio network device.
10. the double-frequency planar antenna of radio network device as claimed in claim 1, it is characterized in that: the material of this substrate can be the printed circuit board (PCB) that glass fiber-reinforced resin or FR4 glass reinforced epoxy are made, or can be the pliability sheet substrate that polyimides is made, the perhaps not imperial ceramic substrate of iron.
11. the double-frequency planar antenna of a radio network device is to use the antenna that can operate in double frequency-band on radio network device, it is characterized in that comprising:
One substrate has first surface and second surface;
One feed-in microstrip line is equipped on this first surface, and an end is provided with a load point;
One the one Y type metal wire is equipped on this first surface, connects the load point of first mid line to this feed-in microstrip line;
One the 2nd Y type metal wire, be equipped on the first surface, connect the load point of second mid line, and first mid line and second mid line be to form a θ angle to the feed-in microstrip line, perhaps apart can be between the circulation of first metal and the circulation of second metal greater than a spacing distance; And
One ground plane is the Lower Half that is arranged on the second surface, and is not encompassed in the zone of a Y type metal wire, the 2nd Y type metal wire, first mid line and second mid line.
12. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: radio network device is to be WAP (wireless access point), wireless network card, wireless network router or radio network netgate device.
13. the double-frequency planar antenna of radio network device as claimed in claim 11, it is characterized in that: by the load point of feed-in microstrip line through first mid line to a Y type metal wire, form the courses of action of first resonance circuit, first (lower) frequency of operation of decision antenna.
14. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: through second mid line to the, two Y type metal wires, form the courses of action of second resonance circuit by load point, second (higher) frequency of operation of decision antenna.
15. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: the feed-in microstrip line is to have 50 ohm of characteristic impedances, in order to transmission signals.
16. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: the θ angle can be 30 °～180 °.
17. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: spacing distance needs greater than 2.1mm.
18. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: feed-in microstrip line, a Y type metal wire, the 2nd Y type metal wire, first mid line, second mid line and ground plane are that the mode with printed circuit board (PCB) is printed on the substrate.
19. the double-frequency planar antenna of radio network device as claimed in claim 11 is characterized in that: ground plane is the earthing potential end that can be connected in radio network device.
20. the double-frequency planar antenna of radio network device as claimed in claim 11, it is characterized in that: the material of substrate can be the printed circuit board (PCB) that glass fiber-reinforced resin or FR4 glass reinforced epoxy are made, or can be the pliability sheet substrate that polyimides is made, the perhaps not imperial ceramic substrate of iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074518 CN1747234A (en) | 2004-09-06 | 2004-09-06 | Double-frequency planar antenna of wireless network device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074518 CN1747234A (en) | 2004-09-06 | 2004-09-06 | Double-frequency planar antenna of wireless network device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1747234A true CN1747234A (en) | 2006-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410074518 Pending CN1747234A (en) | 2004-09-06 | 2004-09-06 | Double-frequency planar antenna of wireless network device |
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| Country | Link |
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| CN (1) | CN1747234A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8179322B2 (en) | 2007-09-28 | 2012-05-15 | Pulse Finland Oy | Dual antenna apparatus and methods |
| US8786499B2 (en) | 2005-10-03 | 2014-07-22 | Pulse Finland Oy | Multiband antenna system and methods |
| CN106684564A (en) * | 2016-12-09 | 2017-05-17 | 上海斐讯数据通信技术有限公司 | High-gain antenna |
-
2004
- 2004-09-06 CN CN 200410074518 patent/CN1747234A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8786499B2 (en) | 2005-10-03 | 2014-07-22 | Pulse Finland Oy | Multiband antenna system and methods |
| US8179322B2 (en) | 2007-09-28 | 2012-05-15 | Pulse Finland Oy | Dual antenna apparatus and methods |
| CN106684564A (en) * | 2016-12-09 | 2017-05-17 | 上海斐讯数据通信技术有限公司 | High-gain antenna |
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Open date: 20060315 |