EP0831548B1 - Antenna - Google Patents

Antenna Download PDF

Info

Publication number
EP0831548B1
EP0831548B1 EP97116385A EP97116385A EP0831548B1 EP 0831548 B1 EP0831548 B1 EP 0831548B1 EP 97116385 A EP97116385 A EP 97116385A EP 97116385 A EP97116385 A EP 97116385A EP 0831548 B1 EP0831548 B1 EP 0831548B1
Authority
EP
European Patent Office
Prior art keywords
radiation electrode
antenna
electrode layer
layer
radiation
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP97116385A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0831548A2 (en
EP0831548A3 (en
Inventor
Shigekazu Itoh
Nobuhiko Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of EP0831548A2 publication Critical patent/EP0831548A2/en
Publication of EP0831548A3 publication Critical patent/EP0831548A3/en
Application granted granted Critical
Publication of EP0831548B1 publication Critical patent/EP0831548B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H01Q5/385—Two or more parasitic elements
    • 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
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
    • 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
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave

Definitions

  • the present invention relates to an antenna and, more particularly, to an antenna which supports a plurality of frequency bands and which is capable of selecting a polarized wave.
  • An antenna 100 shown in Figs. 5 and 6 is formed of a substrate 101 made of a dielectric material, a radiation electrode 102 formed on one main surface of the substrate 101, and a grounding electrode 103 formed on the other main surface of the substrate 101, with a through hole 104 for feeding being provided at a place corresponding to the radiation electrode 102 of the substrate 101.
  • a connector 105 for feeding to the radiation electrode 102 is inserted into the through hole 104 in such a manner as to go through the substrate 101 from the other main surface of the substrate 101.
  • the connector 105 is made to conduct with the radiation electrode 102 by solder 106a and is fixed to the substrate 101 by the solder 106a and solder 106b.
  • This antenna 100 receives circularly polarized waves, with a degeneration separation section 102a being provided in the radiation electrode 102, as shown in Fig. 5.
  • an antenna 110 shown in Figs. 7 and 8 is formed of a substrate 111 made of a dielectric material, a radiation electrode 112 formed on one main surface of the substrate 111, and a grounding electrode 113 formed on the other main surface of the substrate 111, with a through hole 114 for feeding being provided at a place corresponding to the radiation electrode 111 of the substrate 111.
  • a connector 115 for feeding to the radiation electrode 112 is inserted into the through hole 114 in such a manner as to go through the substrate 111 from the other main surface of the substrate 111.
  • the connector 115 is made to conduct with the radiation electrode 112 by solder 116a and is fixed to the substrate 111 by the solder 116a and solder 116b.
  • This antenna 110 receives linearly polarized waves, and unlike the radiation electrode 102 of the antenna 100, a degeneration separation section is not provided in the radiation electrode 112, as shown in Fig. 7.
  • EP 0 831 547 A2 which is the prior art document pursuant to Article 54 (3) and (4) EPC, describes a microstrip antenna having a dielectric substrate on one main surface of which a first radiation electrode is formed and on the opposing main surface of which a ground electrode is formed. Second radiation electrodes capacitively coupled to the first radiation electrode are formed on the periphery of the first radiation electrode either on the main surface of the substrate or with a dielectric layer interposed between same and the first radiation electrode. Through-holes for providing a connection between the ground electrode and the second radiation electrodes as well as for providing a feed terminal to the first radiation electrode are provided.
  • Yoshio Ebine et al. describes in the article "A Wide Beamwidth and Broad Bandwidth Microstrip Antenna with a Pair of Short-Circuit Patches" in IEICE transactions, Vol. D74, No. 10, October 1, 1991, pages 3241 to 3245, a microstrip antenna consisting of a rectangular patch antenna and a pair of parasitic short-circuit patches placed over the radiating edges of the rectangular patch.
  • the parasitic elements not only widen the bandwidth of the antenna, but also form a narrowed pair of radiating edges, so that the E-plane beam width becomes broader.
  • US-A-5,243,353 describes a circularly polarized broadband microstrip antenna having a ground plane, a disc-shaped driven element and a disc-shaped parasitic element.
  • the driven element is located between the ground plane and the parasitic element and is parallel to both of them.
  • the driven element and parasitic elements both have diametrically-opposed notches and diametrically-opposed projections.
  • the driven element is coupled to a conducting strip that forms, together with the ground plane, a microstrip transmission line.
  • EP-A-0 655 797 describes a quarter-wave gap-coupled tunable strip antenna having first and second parasitically-excited strips resonant at a lower and upper frequency, respectively, of the antenna bandwidth.
  • the strips have trim tabs for adjusting the resonance frequency of each strip.
  • the present invention provides an antenna of the lamination-type in which a plurality of dielectric layers, a first radiation electrode layer, a second radiation electrode layer and a grounding electrode layer are laminated, the grounding electrode layer being disposed between two of the plurality of dielectric layers, and the dielectric layers being formed between each pair of the first radiation electrode layer, the second radiation electrode layer, and the grounding electrode layer, the antenna comprising: a capacitance coupling section, provided on the first radiation electrode layer and the second radiation electrode layer, for capacitively coupling between the first radiation electrode layer and the second radiation electrode layer; a feeding section for feeding to the first radiation electrode layer; and a through hole through which the second radiation electrode layer and the grounding electrode layer are brought into conduction.
  • the first radiation electrode layer operates as an antenna which supports one frequency band
  • the first radiation electrode layer and the second radiation electrode layer are capacitively coupled to form another strip line, and thus this operates as an antenna which supports another frequency band. Therefore, an antenna which supports a plurality of frequency bands by one block can be obtained, and only one feeding section is required to feed to radiation electrodes, and a small size can be achieved.
  • a polarized wave can be selected by adjusting the capacitance value in the capacitive coupling section and on the basis of the position at which the capacitive coupling section is disposed.
  • Fig. 1 is a plan view illustrating the construction of a microstrip antenna according to a first embodiment of the present invention.
  • Fig. 2 is an exploded perspective view illustrating the construction of the microstrip antenna according to the first embodiment of the present invention.
  • Fig. 3 is a plan view illustrating the construction of a microstrip antenna according to a second embodiment of the present invention.
  • Fig. 4 is a plan view illustrating the construction in which a degeneration separation section is provided in a first radiation electrode portion in the microstrip antenna of the present invention.
  • Fig. 5 is a plan view illustrating the construction of a conventional microstrip antenna.
  • Fig. 6 is a sectional view taken along the line B-B in Fig. 5.
  • Fig. 7 is a plan view illustrating the construction of the conventional microstrip antenna.
  • Fig. 8 is a sectional view taken along the line C-C in Fig. 7.
  • reference numeral 1 denotes a strip-line-type antenna, which is formed of dielectric layers 11a, 11b and 11c made of a ceramic sheet, a grounding electrode layer 12 which is disposed on the upper layer of the dielectric layer 11a and which has nearly the same area of the dielectric layer 11a, a first radiation electrode layer 13 in the shape of nearly a square which is disposed on the upper layer of the dielectric layer 11b, a second radiation electrode layer 14 which is disposed on the upper layer of the dielectric layer 11c and which is disposed in the shape of nearly the letter L at a position corresponding to the portion where the first radiation electrode layer 13 is not disposed, a through hole 15 for feeding formed from the rear surface of the dielectric layer 11a to the first radiation electrode layer 13 in order to feed to the first radiation electrode layer, a plurality of through holes 16 for connecting the second radiation electrode layer to the grounding electrode layer, and capacitive coupling sections 17a and 17b which are protrusively formed in each of the first radiation electrode
  • a connector serving as a coaxial line for feeding to the first radiation electrode layer 13 is inserted into the through hole 15 for feeding, and the first radiation electrode layer 13 and the connector are brought into conduction and fixed by solder.
  • the strip-line-type antenna 1 constructed as described above is capacitively coupled between the first radiation electrode layer 13 and the second radiation electrode layer 14 by the capacitive coupling sections 17a and 17b.
  • the first radiation electrode layer 13 portion functions as an antenna which supports one frequency band (high frequencies)
  • the whole portion containing the first radiation electrode layer 13 and the second radiation electrode layer 14 functions as an antenna which supports another frequency band (low frequencies).
  • an antenna 20 according to a second embodiment of the present invention will be described with reference to Fig. 3.
  • Components in the antenna 20 which are the same as those of the antenna 1 shown in Fig. 1 are given the same reference numerals, and therefore, a description thereof has been omitted.
  • second radiation electrode layers 22, 23, 24 and 25 in a nearly rectangular shape are disposed in portions corresponding to the positions which surround all the four sides of the first radiation electrode layer 13 formed as nearly a square, and capacitive coupling sections 17a, 17b, 17c and 17d for capacitively coupling the first radiation electrode layer 13 to the second radiation electrode layers 22, 23, 24 and 25 are disposed.
  • This antenna 20 functions as a microstrip antenna such that the first radiation electrode layer 13 supports one frequency band, the first radiation electrode layer 13 and the second radiation electrode layers 22 and 23 support another one frequency band, and the first radiation electrode layer 13 and the second radiation electrode layers 24 and 25 support still another one frequency band.
  • the second radiation electrode layers 22 and 23 may be coupled nearly in the shape of the letter L, and the second radiation electrode layers 24 and 25 may be coupled nearly in the shape of the letter L.
  • the second radiation electrode layer 14 may be formed divided nearly in the shape of a rectangle.
  • the first radiation electrode layer and the second radiation electrode layer are capacitively coupled by a capacitive coupling section, it is possible to easily adjust the frequency band to be received on the low frequencies and select a polarized wave to be received on the low frequencies by deviating the position at which the capacitive coupling section is formed or by trimming the capacitive coupling section.
  • this capacitive coupling section is of a lamination-type and does not require special manufacturing steps, formation thereof is easy, and a low height of the antenna can be achieved because the thickness thereof is small.
  • the first radiation electrode layer 13 described in each embodiment, in a shape having the degeneration separation section 13a as shown in Fig. 4, is also capable of selecting a polarized wave on the high frequencies to be received by the first radiation electrode layer 13. Since components in Fig. 4 which are other than the degeneration separation section 13a are the same as those of the microstrip antenna 1 shown in the above-described first embodiment, they are given the same reference numerals, and therefore, a description thereof has been omitted.
  • the antenna of the present invention it is possible to set a polarized wave in the first radiation electrode layer which supports one frequency band (high frequencies), and in the whole portion containing the first radiation electrode layer and the second radiation electrode layer, which supports another frequency band (low frequencies), it becomes also possible to select a polarized wave.
  • the second radiation electrode layer and the grounding electrode layer are connected to each other by a plurality of through holes, if the second radiation electrode layer is grounded in terms of a high frequency, the number of through holes may be appropriately selected and determined.
  • the ceramic sheet of the bottommost layer may be an alumina substrate, an aluminum nitride substrate or the like.
  • the antenna of the present invention is obtained by laminating a plurality of ceramic sheets and a plurality of electrode layers and then calcining them. Though not particularly shown in the figure, after a plurality of electrode patterns are formed on one ceramic sheet and calcined, the sheet is divided and cut, making it possible to manufacture a large number of antennas. Thus, the cost can be reduced.
  • the first radiation electrode layer functions as an antenna which supports one frequency band
  • the first radiation electrode layer and the second radiation electrode layer are capacitively coupled to form another microstrip line and function as an antenna which supports another frequency band.
  • an antenna which supports a plurality of frequency bands can be obtained on one substrate.
  • feeding to radiation electrodes requires only one feeding section, a small size can be achieved.

Landscapes

  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Laminated Bodies (AREA)
EP97116385A 1996-09-24 1997-09-19 Antenna Expired - Lifetime EP0831548B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP251555/96 1996-09-24
JP25155596A JP3180684B2 (ja) 1996-09-24 1996-09-24 アンテナ
JP25155596 1996-09-24

Publications (3)

Publication Number Publication Date
EP0831548A2 EP0831548A2 (en) 1998-03-25
EP0831548A3 EP0831548A3 (en) 1998-04-01
EP0831548B1 true EP0831548B1 (en) 2003-03-05

Family

ID=17224571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97116385A Expired - Lifetime EP0831548B1 (en) 1996-09-24 1997-09-19 Antenna

Country Status (4)

Country Link
EP (1) EP0831548B1 (ja)
JP (1) JP3180684B2 (ja)
DE (1) DE69719429T2 (ja)
NO (1) NO320921B1 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929689A1 (de) * 1999-06-29 2001-01-11 Siemens Ag Integrierbare Dualband-Antenne
FI114254B (fi) 2000-02-24 2004-09-15 Filtronic Lk Oy Tasoantennirakenne
GB2370158B (en) * 2000-12-13 2004-10-13 Harada Ind Multiband PIFA-type antenna for vehicular applications
JP2004328694A (ja) 2002-11-27 2004-11-18 Taiyo Yuden Co Ltd アンテナ及び無線通信カード
EP1569299B1 (en) 2002-11-27 2008-10-22 Taiyo Yuden Co., Ltd. Antenna, dielectric substrate for antenna, radio communication card
JP4170828B2 (ja) 2002-11-27 2008-10-22 太陽誘電株式会社 アンテナ及びアンテナ用誘電体基板
JP2004328693A (ja) 2002-11-27 2004-11-18 Taiyo Yuden Co Ltd アンテナ及びアンテナ用誘電体基板
JP2004328703A (ja) 2002-11-27 2004-11-18 Taiyo Yuden Co Ltd アンテナ
CN1815811B (zh) * 2005-01-31 2012-05-09 东南大学 复合微带印刷振子宽带天线
CN102067377A (zh) * 2008-06-25 2011-05-18 北京昆天科微电子技术有限公司 一种天线装置和采用它的电子产品
JP2012090251A (ja) * 2010-09-24 2012-05-10 Furukawa Electric Co Ltd:The アンテナ装置
JP5891359B2 (ja) * 2011-03-24 2016-03-23 パナソニックＩｐマネジメント株式会社 複共振型アンテナ装置
WO2019079441A1 (en) * 2017-10-18 2019-04-25 Commscope Technologies Llc RADIANT ELEMENTS WITH WIDEBAND STACKED PLATES AND PHASE CONTROL NETWORK ANTENNAS THEREFOR
JP7147983B2 (ja) * 2019-06-26 2022-10-05 株式会社村田製作所 フレキシブル基板、およびフレキシブル基板を備えるアンテナモジュール
CN110752442A (zh) * 2019-10-16 2020-02-04 西安空间无线电技术研究所 一种宽波束低宽角轴比圆极化天线单元及其辐射方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831547A2 (en) * 1996-09-20 1998-03-25 Murata Manufacturing Co., Ltd. Microstrip antenna

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2536194B2 (ja) * 1989-10-31 1996-09-18 三菱電機株式会社 マイクロストリップアンテナ
US5420596A (en) * 1993-11-26 1995-05-30 Motorola, Inc. Quarter-wave gap-coupled tunable strip antenna

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831547A2 (en) * 1996-09-20 1998-03-25 Murata Manufacturing Co., Ltd. Microstrip antenna

Also Published As

Publication number Publication date
EP0831548A2 (en) 1998-03-25
EP0831548A3 (en) 1998-04-01
NO974384L (no) 1998-03-25
JPH1098330A (ja) 1998-04-14
NO974384D0 (no) 1997-09-23
DE69719429T2 (de) 2004-01-15
DE69719429D1 (de) 2003-04-10
JP3180684B2 (ja) 2001-06-25
NO320921B1 (no) 2006-02-13

Similar Documents

Publication Publication Date Title
JP3180683B2 (ja) 表面実装型アンテナ
US6005519A (en) Tunable microstrip antenna and method for tuning the same
US6300906B1 (en) Wideband phased array antenna employing increased packaging density laminate structure containing feed network, balun and power divider circuitry
US5450090A (en) Multilayer miniaturized microstrip antenna
EP0831548B1 (en) Antenna
EP0105103B1 (en) Microstrip antenna system having nonconductively coupled feedline
EP1466386B1 (en) Enhanced bandwidth dual layer current sheet antenna
EP0447218B1 (en) Plural frequency patch antenna assembly
US6501427B1 (en) Tunable patch antenna
US4843400A (en) Aperture coupled circular polarization antenna
EP0207029B1 (en) Electromagnetically coupled microstrip antennas having feeding patches capacitively coupled to feedlines
EP2238646B1 (en) Patch antenna with capacitive elements
EP0649185A1 (en) Improvements in or relating to antennas
US20040027291A1 (en) Planar antenna and array antenna
JP4431567B2 (ja) 素子内結合を具備する単一偏波スロットアンテナアレー及びその製造方法
EP1130676A2 (en) Patch antenna with embedded impedance transformer and methods for making same
US5461393A (en) Dual frequency cavity backed slot antenna
CN104124521A (zh) 用于无线多波段通信***的改进印刷偶极天线
JP2846081B2 (ja) トリプレート型平面アンテナ
US20020113737A1 (en) Dual band printed antenna
EP0118690B1 (en) Annular slot antenna
EP1085595B1 (en) Surface-mounted antenna and communication apparatus using same
EP1022803B1 (en) Dual polarisation antennas
US6384792B2 (en) Narrowband/wideband dual mode antenna
US5633646A (en) Mini-cap radiating element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

17P Request for examination filed

Effective date: 19970919

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FI FR GB SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AKX Designation fees paid

Free format text: DE FI FR GB SE

RBV Designated contracting states (corrected)

Designated state(s): DE FI FR GB SE

17Q First examination report despatched

Effective date: 20010704

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FI FR GB SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030305

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69719429

Country of ref document: DE

Date of ref document: 20030410

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030605

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031208

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090916

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090917

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20091012

Year of fee payment: 13

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100919

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110531

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69719429

Country of ref document: DE

Effective date: 20110401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100919