WO2002047200A1 - Antenna arrangement - Google Patents

Antenna arrangement Download PDF

Info

Publication number
WO2002047200A1
WO2002047200A1 PCT/SE2001/002737 SE0102737W WO0247200A1 WO 2002047200 A1 WO2002047200 A1 WO 2002047200A1 SE 0102737 W SE0102737 W SE 0102737W WO 0247200 A1 WO0247200 A1 WO 0247200A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiator
antenna arrangement
ground
antenna
arrangement according
Prior art date
Application number
PCT/SE2001/002737
Other languages
French (fr)
Inventor
Håkan SEGERSTEDT
Original Assignee
Avantego Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE0004587A external-priority patent/SE0004587D0/en
Application filed by Avantego Ab filed Critical Avantego Ab
Priority to AU2002221247A priority Critical patent/AU2002221247A1/en
Publication of WO2002047200A1 publication Critical patent/WO2002047200A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to an antenna arrangement comprising a radiator, a ground structure, feed connector and ground connector.
  • the size of the communication devices such as radio transceivers, mobile telephones, Bluetooth equipped devices, etc., is reduced every day as a result of the reduced size of the electrical components. Moreover, the transmission rate of these devices has increased.
  • the antenna is the size of the radiator.
  • the antenna must be small, have high transmission rate and small.
  • IF As (Inverted F- Antennas) 10 are known, as shown in Fig. 1, comprising a radiator 11 of ⁇ /4 type arranged in parallel with a ground plane 12 on a carrier, such as a printed circuit board.
  • the radiator 11 is fed via a connector 13 and the radiator is connected to the ground via connector 14.
  • the antenna has a minimum voltage at or close to the ground connection.
  • the IFA is usually a broadband antenna, and not suitable for small band applications.
  • the radiator is small in size, and e.g. in GHz applications, the antenna is mechanically instable, which means that the position of the radiator relative the ground plane can be displaced, which affects the antenna characteristics.
  • ILA Inverted L- Antenna
  • patch antennas are known in which the radiator size and the distance between the radiator and ground plane is significant.
  • the main object of the present invention is to provide an antenna arrangement of ground dependent type, which has a distinct distance between the radiator and the ground plane and has a minimum voltage at one end section of the radiator.
  • the radiator comprises at least a first and a second end and that said radiator is connected to said ground structure at said first and second ends by means of said ground connectors.
  • Fig. 1 is a schematic illustration of an IFA according to prior art
  • Fig. 2 is a schematic illustration of an antenna according to the present invention
  • Fig. 3 is a schematic perspective view of a second embodiment of the antenna according to the invention
  • Figs. 4a-4d are schematic views of further embodiments according to the invention.
  • the antenna 20 comprises an oblong radiator 21, a feed connector 23, ground connections 24a and 24b and a ground structure 22.
  • the radiator 21 has a first and a second end and it is connected to the ground structure 22 by means of connectors 24a and 24b at said first and second end.
  • the feed connector 23 is arranged so that a suitable impedance is achieved, e.g. 50 ⁇ .
  • the feed connector is arranged close to the ground connector 24b.
  • the feed connector in this case extends through the ground structure via a hole and it is isolated from the ground. However, it can be arranged to contact the radiator from above or a side.
  • the antenna obtained according to the invention is a ⁇ /2 antenna which normally has better characteristics than a ⁇ /4 antenna, which can be a result of the amount of currents on the radiator.
  • the antenna element can consist of a wire or the like. It may also consist of a strip arranged on a carrier. As shown in Fig. 3, the antenna 30 may also consist of plate-shaped radiator 31 arranged above a ground plane 32. In this embodiment the ground connectors 34a and 34b have different dimensions. The radiator is fed via connector 33. This antenna corresponds to a Planar Inverted E- Antenna (PIEA).
  • PIEA Planar Inverted E- Antenna
  • the antenna according to the invention has different electrical properties than the prior art antennas described above.
  • the diagram of Fig. 3 illustrates the with respect to the radiator's 21 extension. The minimum voltage is obtained at one grounded end where the feeding is arranged. The cross over from of the current direction is situated approximately at the middle section of the radiator.
  • the antenna may also comprise a non-conductive carrier on which the parts of the antenna are plated and which can be snapped above a ground plane.
  • Figs 4a- 4c Other embodiments of the antenna according to the invention are illustrated in Figs 4a- 4c.
  • the ground connectors are arranged in a distance from the ends of the radiator.
  • Fig. 4b which is a perspective view
  • the radiator is substantially L-shaped.
  • Fig. 4c the radiator is substantially T-shaped having a ground connection at the third end.
  • Fig. 4d the radiator is substantially U-shaped.

Abstract

The present invention relates to an antenna arrangement (20, 30) comprising a radiator (21, 31), a ground structure (22, 32), a feed connector (23, 33) and ground connectors (24a, 24b; 34a, 34b). Said radiator comprises a first and a second end and that said radiator is connected to said ground structure at said first and second ends by means of said ground connectors (24a, 24b; 34a, 34b).

Description

TITLE
ANTENNA ARRANGEMENT
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an antenna arrangement comprising a radiator, a ground structure, feed connector and ground connector.
BACKGROUND OF THE INVENTION
The size of the communication devices, such as radio transceivers, mobile telephones, Bluetooth equipped devices, etc., is reduced every day as a result of the reduced size of the electrical components. Moreover, the transmission rate of these devices has increased.
One critical point in a radio device is the antenna, especially the size of the radiator. The antenna must be small, have high transmission rate and small.
IF As (Inverted F- Antennas) 10 are known, as shown in Fig. 1, comprising a radiator 11 of λ/4 type arranged in parallel with a ground plane 12 on a carrier, such as a printed circuit board. The radiator 11 is fed via a connector 13 and the radiator is connected to the ground via connector 14. The antenna has a minimum voltage at or close to the ground connection.
The IFA is usually a broadband antenna, and not suitable for small band applications. Moreover, the radiator is small in size, and e.g. in GHz applications, the antenna is mechanically instable, which means that the position of the radiator relative the ground plane can be displaced, which affects the antenna characteristics.
Also, ILA (Inverted L- Antenna) and patch antennas are known in which the radiator size and the distance between the radiator and ground plane is significant. SUMMARY OF THE INVENTION
Thus, the main object of the present invention is to provide an antenna arrangement of ground dependent type, which has a distinct distance between the radiator and the ground plane and has a minimum voltage at one end section of the radiator.
Other advantages with the antenna arrangement are the excellent electrical and RF characteristics and mechanical stability.
Therefore, in the imtially described antenna arrangement the radiator comprises at least a first and a second end and that said radiator is connected to said ground structure at said first and second ends by means of said ground connectors.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following, the invention will be further described in a non-limiting way with reference to the accompanying drawings in which:
Fig. 1 is a schematic illustration of an IFA according to prior art, Fig. 2 is a schematic illustration of an antenna according to the present invention,
Fig. 3 is a schematic perspective view of a second embodiment of the antenna according to the invention, and Figs. 4a-4d are schematic views of further embodiments according to the invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
According to one preferred embodiment of the invention as shown in Fig. 2, the antenna 20 comprises an oblong radiator 21, a feed connector 23, ground connections 24a and 24b and a ground structure 22. The radiator 21 has a first and a second end and it is connected to the ground structure 22 by means of connectors 24a and 24b at said first and second end. Thus, a stable construction is obtained. The feed connector 23 is arranged so that a suitable impedance is achieved, e.g. 50 Ω . In this case the feed connector is arranged close to the ground connector 24b. The feed connector in this case extends through the ground structure via a hole and it is isolated from the ground. However, it can be arranged to contact the radiator from above or a side.
Thus, the antenna obtained according to the invention is a λ/2 antenna which normally has better characteristics than a λ/4 antenna, which can be a result of the amount of currents on the radiator.
The antenna element can consist of a wire or the like. It may also consist of a strip arranged on a carrier. As shown in Fig. 3, the antenna 30 may also consist of plate-shaped radiator 31 arranged above a ground plane 32. In this embodiment the ground connectors 34a and 34b have different dimensions. The radiator is fed via connector 33. This antenna corresponds to a Planar Inverted E- Antenna (PIEA).
The antenna according to the invention has different electrical properties than the prior art antennas described above. The diagram of Fig. 3 illustrates the with respect to the radiator's 21 extension. The minimum voltage is obtained at one grounded end where the feeding is arranged. The cross over from of the current direction is situated approximately at the middle section of the radiator.
The antenna may also comprise a non-conductive carrier on which the parts of the antenna are plated and which can be snapped above a ground plane.
Other embodiments of the antenna according to the invention are illustrated in Figs 4a- 4c. In Fig. 4a, the ground connectors are arranged in a distance from the ends of the radiator. In Fig. 4b, which is a perspective view, the radiator is substantially L-shaped. In Fig. 4c, the radiator is substantially T-shaped having a ground connection at the third end. In Fig. 4d, the radiator is substantially U-shaped.
The invention is not limited the shown embodiments but can be varied in a number of ways without departing from the scope of the appended claims and the arrangement and the method can be implemented in various ways depending on application, functional units, needs and requirements etc.

Claims

1. Antenna arrangement (20, 30) comprising a radiator (21, 31), a ground structure (22, 32), a feed connector (23, 33) and ground connectors (24a, 24b; 34a, 34b), characterised in that said radiator comprises at least one first and one second end and that said radiator is connected to said ground structure at said first and second ends by means of said ground connectors (24a, 24b; 34a, 34b).
2. The antenna arrangement of claim 1, characterised in that said radiator is arranged substantially parallel to said ground structure.
3. The antenna arrangement of claim 1 or 2, characterised in that said feed connector is arranged between said first and second ends such that a suitable impedance is obtained.
4. The antenna arrangement according to any of claims 1 - 3, characterised in that said radiator (21) consists of a wire.
5. The antenna arrangement according to any of claims 1 - 3, characterised in that said radiator (31) is plate shaped.
6. The antenna arrangement according to any of claims 1 - 3, characterised in that said radiator is a strip arranged on a carrier.
7. The antenna arrangement according to any of claims 1 - 3, characterised in that said radiator, feed connector and ground connectors are arranged as a plated layer on a shaped non-conductive carrier.
8. The antenna arrangement according to any of preceding claims, characterised in that said radiator is substantially L-shaped.
9. The antenna arrangement according to any of preceding claims, characterised in that said radiator is substantially U-shaped.
10. The antenna arrangement according to any of preceding claims, characterised in that said radiator is substantially T-shaped.
11. The antenna arrangement of claim 10, characterised in that said a ground connector is arranged at each end of said substantially T-shaped radiator.
12. The antenna arrangement according to any of preceding claims, characterised in that said ground connectors are arranged in a distance from said first and second ends.
13. The antenna arrangement according to any of preceding claims, characterised in that said antenna arrangement is a λ/2 antenna.
14. The antenna arrangement according to any one of claims 2-13, characterised in that said impedance is 50Ω .
15. A method of providing a λ/2 antenna arrangement (20, 30) comprising a radiator (21, 31), a ground structure (22, 32), a feed connector (23, 33) and ground connectors (24a, 24b; 34a, 34b), said radiator comprises at least first and second ends, characterised by connecting said radiator to said ground structure at said first and second ends by means of said ground connectors (24a, 24b; 34a, 34b) and arranging said feed connector in a distance from one of said ground connectors such that a suitable impedance is obtained.
PCT/SE2001/002737 2000-12-08 2001-12-10 Antenna arrangement WO2002047200A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002221247A AU2002221247A1 (en) 2000-12-08 2001-12-10 Antenna arrangement

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US25422700P 2000-12-08 2000-12-08
SE0004587-2 2000-12-08
SE0004587A SE0004587D0 (en) 2000-12-08 2000-12-08 Antenna arrangement
US60/254,227 2000-12-08

Publications (1)

Publication Number Publication Date
WO2002047200A1 true WO2002047200A1 (en) 2002-06-13

Family

ID=26655338

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002737 WO2002047200A1 (en) 2000-12-08 2001-12-10 Antenna arrangement

Country Status (2)

Country Link
AU (1) AU2002221247A1 (en)
WO (1) WO2002047200A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2225797B1 (en) * 2007-12-21 2016-11-02 Gigaset Communications GmbH Antenna apparatus for radio-based electronic devices
EP3217476A1 (en) * 2016-03-11 2017-09-13 Sercomm Corporation Antenna device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394160A (en) * 1991-09-04 1995-02-28 Nec Corporation Portable radio with coplanar ground and atenna conductive films formed on the inner surface of the case
US5764190A (en) * 1996-07-15 1998-06-09 The Hong Kong University Of Science & Technology Capacitively loaded PIFA
US5929825A (en) * 1998-03-09 1999-07-27 Motorola, Inc. Folded spiral antenna for a portable radio transceiver and method of forming same
EP1018779A2 (en) * 1999-01-05 2000-07-12 Lk-Products Oy Planar dual-frequency antenna and radio apparatus employing a planar antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394160A (en) * 1991-09-04 1995-02-28 Nec Corporation Portable radio with coplanar ground and atenna conductive films formed on the inner surface of the case
US5764190A (en) * 1996-07-15 1998-06-09 The Hong Kong University Of Science & Technology Capacitively loaded PIFA
US5929825A (en) * 1998-03-09 1999-07-27 Motorola, Inc. Folded spiral antenna for a portable radio transceiver and method of forming same
EP1018779A2 (en) * 1999-01-05 2000-07-12 Lk-Products Oy Planar dual-frequency antenna and radio apparatus employing a planar antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2225797B1 (en) * 2007-12-21 2016-11-02 Gigaset Communications GmbH Antenna apparatus for radio-based electronic devices
EP3217476A1 (en) * 2016-03-11 2017-09-13 Sercomm Corporation Antenna device

Also Published As

Publication number Publication date
AU2002221247A1 (en) 2002-06-18

Similar Documents

Publication Publication Date Title
US6218992B1 (en) Compact, broadband inverted-F antennas with conductive elements and wireless communicators incorporating same
US6072434A (en) Aperture-coupled planar inverted-F antenna
US6380895B1 (en) Trap microstrip PIFA
US6429819B1 (en) Dual band patch bowtie slot antenna structure
US7579996B2 (en) Foldable broadband antenna and method of using the same
US20050237244A1 (en) Compact RF antenna
US8928537B2 (en) Multiband antenna
KR20020011141A (en) Integrable dual-band antenna
US6864854B2 (en) Multi-band antenna
JP3980172B2 (en) Broadband antenna
US8508415B2 (en) Antenna and electric device having the same
JP4169696B2 (en) High bandwidth multiband antenna
US6816122B2 (en) Four-point feeding loop antenna capable of easily obtaining an impedance match
CN101090176A (en) Planar antenna
CN112599982B (en) Antenna structure and communication device
US20020101381A1 (en) Antenna arrangement
CN101971421A (en) Antenna element
US7626550B2 (en) Electronic device and antenna thereof
JP2002271131A (en) Planar antenna
CN106058442B (en) A kind of antenna
WO2002047200A1 (en) Antenna arrangement
US20070146205A1 (en) Antenna array
CN219203498U (en) Dual polarized aperture coupling feed antenna and communication module
CN217035978U (en) Antenna structure and electronic equipment
KR20090049513A (en) Antenna device for wireless communication

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EC EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC, F1205A DATED 15/09/03

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP