EP0635899A1 - Microstrip array antenna - Google Patents

Microstrip array antenna Download PDF

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Publication number
EP0635899A1
EP0635899A1 EP94111319A EP94111319A EP0635899A1 EP 0635899 A1 EP0635899 A1 EP 0635899A1 EP 94111319 A EP94111319 A EP 94111319A EP 94111319 A EP94111319 A EP 94111319A EP 0635899 A1 EP0635899 A1 EP 0635899A1
Authority
EP
European Patent Office
Prior art keywords
layer
metallic
array
fed
microstrip
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.)
Withdrawn
Application number
EP94111319A
Other languages
German (de)
English (en)
French (fr)
Inventor
Piermario Besso
Paolo Bielli
Davide Forigo
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.)
SIP SAS
Telecom Italia SpA
Original Assignee
SIP SAS
SIP Societa Italiana per lEsercizio delle Telecomunicazioni SpA
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 SIP SAS, SIP Societa Italiana per lEsercizio delle Telecomunicazioni SpA filed Critical SIP SAS
Publication of EP0635899A1 publication Critical patent/EP0635899A1/en
Withdrawn legal-status Critical Current

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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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/065—Patch antenna array

Definitions

  • the present invention relates to devices for microwave telecommunication systems and more particularly it concerns a microstrip array antenna.
  • Microstrip array antennas are microwave directive antennas, which can be advantageously used as antennas in telecommunication networks both for point-to-point and point-to-multipoint links, for services such as speech, data, video, and in the mobile radio network for base stations and for interconnection between the base stations themselves.
  • antennas are also specially suitable for use in the urban areas thanks to their planar structure enabling very reduced volumes and weights to be obtained. Their small thickness, just a few centimeters, makes them easy to camouflage and they can therefore be mounted without altering the characteristics of the structure where they are placed and this lets the specially critical environmental constraints in urban area be overcome.
  • microstrip array antennas The main purpose in designing microstrip array antennas is to obtain radiating characteristics which can be compared with those of reflector antennas having the same dimensions. More particularly, the most critical requirements are the reduction of the side lobes, the gain for the required bandwidth, the symmetry of the main lobe in E and H-planes and the reduction of return losses.
  • a microstrip array antenna has been described in the paper "Wideband Aperture-coupled Microstrip Patch Array for Satellite TV Reception", by F. Rostan and alii, published in the Proceedings of the Eighth International Conference on “Antennas and Propagation", 30 March-2 April 1993, Edinburgh, UK.
  • This antenna designed for direct TV reception from satellite, was built in two experimental versions, one made up of an 8x8 element array and the other made up of a 16x16 element array. Measurements carried out on the second version of 16x16 elements, show a reflection coefficient lower than -20 dB only for a 3% bandwidth and a non perfectly symmetrical radiation lobe in E and H-planes. These performances are admissible for the reception of TV programmes, but they are not sufficient for telecommunication antennas.
  • microstrip array antenna object of the present invention which shows a symmetrical radiation pattern in E and H-planes, -20 dB return losses for a usable bandwidth equal to approximately 7% of central frequency and secondary lobes at 90 ⁇ reduced to -60 dB as compared to the main lobe. These are performances similar to those of current reflector antennas.
  • the special object of the present invention is a microstrip array antenna as described in the characterizing part of claim 1.
  • FIG 1 indicates the carrier structure made up of a metallic box, e.g. aluminium, provided with a bottom wall, normally having a square shape, and four side walls to which the antenna planar structure can be secured by means of screws. This latter is thus kept at an optimum distance from the metallic bottom, e.g. 1.25 ⁇ , where ⁇ is the central band wavelength.
  • the function of the carrier structure is to improve the antenna front-to-back ratio and to shield the feed network besides allowing to place a connector CO on one of the side walls and anchorage units on the bottom wall.
  • a layer 3 is made up of a ground metallic plane, periodically punched by 16x16 rectangular slots, long ⁇ /4, wide between ⁇ /10 and ⁇ /20 and spaced by ⁇ /2 in both the orthogonal directions.
  • the metallic plane extends beyond the outermost rows and the outermost columns by a length equal to at least 2 ⁇ , measured from the symmetry centre of the external slots.
  • the antenna is made operating by securing the multilayer structure, obtained by glueing the layers 2, 3 and 4 with one another and to the side walls of carrier structure 1 by means of screws inserted along the edges of the layers themselves and connecting the connector CO to the feed network.
  • the presence of the non-fed elements allows obtaining the mentioned performances and more particularly to obtain a return loss of -20 dB for a usable bandwidth equal to approximately 7% of the central frequency, while the usable bandwidth is only 3% without the non-fed elements.
  • the antenna can be made to offer a wider band, equal to 10% of the central frequency, at a -25dB return loss level, by overlapping to the multilayer structure another layer containing a radiating metallic element array similar to that already present on layer 4 ( Figure 1).
  • FIG. 2 shows two matching and coupling circuits connected to a 3 dB power splitter, indicated with DP.
  • Each circuit is made up of a section of a transmission line LT, which carries the signal up to the centre of a rectangular slot AP, made in the overstanding layer 3, and a matching stub ST.
  • Figure 3 shows the amplitude AMP of the return loss in the 18 GHz band both for the antenna with non-fed elements, indicated as OL, and for an antenna without non-fed elements, indicated as NE, realized according to known technique for measurement purposes.
  • the -20 dB band is of 1.2 GHz
  • the second case is only of 0.5 GHz.
  • Figure 4 shows the radiation pattern section in the H-plane and Figure 5 shows the radiation pattern section in E-plane. A good symmetry is evident in both planes.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
EP94111319A 1993-07-21 1994-07-20 Microstrip array antenna Withdrawn EP0635899A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930543 1993-07-21
ITTO930543A IT1260934B (it) 1993-07-21 1993-07-21 Antenna a schiera in microstriscia

Publications (1)

Publication Number Publication Date
EP0635899A1 true EP0635899A1 (en) 1995-01-25

Family

ID=11411636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111319A Withdrawn EP0635899A1 (en) 1993-07-21 1994-07-20 Microstrip array antenna

Country Status (5)

Country Link
EP (1) EP0635899A1 (it)
JP (1) JPH0766626A (it)
AU (1) AU6342994A (it)
CA (1) CA2128454A1 (it)
IT (1) IT1260934B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523694A1 (de) * 1995-06-29 1997-01-02 Fuba Automotive Gmbh Planarantenne
CN103236582A (zh) * 2013-04-18 2013-08-07 山东国威卫星通信有限公司 贴片加载异形辐射单元圆极化平板天线

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989007838A1 (en) * 1988-02-15 1989-08-24 British Telecommunications Public Limited Company Microstrip antenna

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297905A (ja) * 1988-05-26 1989-12-01 Matsushita Electric Works Ltd 平面アンテナ
JPH0362604A (ja) * 1989-07-31 1991-03-18 Nec Corp 平面アンテナ
JPH03101507A (ja) * 1989-09-14 1991-04-26 Yagi Antenna Co Ltd 平面アンテナ
JP3128317B2 (ja) * 1992-04-10 2001-01-29 三洋電機株式会社 スクロール圧縮機

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989007838A1 (en) * 1988-02-15 1989-08-24 British Telecommunications Public Limited Company Microstrip antenna

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CHEBOLU ET LEE: "COMPARISON OF RECTANGULAR AND TRIANGULAR MICROSTRIP ARRAYS", IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM 1992 DIGEST, vol. ONE, July 1992 (1992-07-01), CHICAGO,USA, pages 163 - 166, XP010065902, DOI: doi:10.1109/APS.1992.221976 *
MILLER ET STAKER: "A WIDE BANDWIDTH HIGH EFFICIENCY LOW CROSSPOLAR MICROSTRIP ARRAY ANTENNA FOR COMMUNICATION APPLICATIONS", IEEE ANTENNAS AND PROPAGATION SOCIETY SYMPOSIUM 1991 DIGEST, vol. 2, 1991, UNIVERSITY OF WESTERN ONTARIO,CANADA, pages 596 - 599, XP010050552, DOI: doi:10.1109/APS.1991.174910 *
ROSTAN ET AL.: "WIDEBAND APERTURE-COUPLED MICROSTRIP PATCH ARRAY FOR SATELLITE TV RECEPTION", IEE EIGTH INTERNATIONAL CONFERENCE ON ANTENNAS AND PROPAGATION PART1, April 1993 (1993-04-01), EDINBURGH,UK, pages 190 - 193 *
TETI ET AL.: "Wideband Airborne Early Warning (AEW) Radar", 1993 IEEE NATIONAL RADAR CONFERENCE, April 1993 (1993-04-01), LYNNFIELDS,MASSACHUSETTS, pages 239 - 244, XP010067872, DOI: doi:10.1109/NRC.1993.270458 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523694A1 (de) * 1995-06-29 1997-01-02 Fuba Automotive Gmbh Planarantenne
CN103236582A (zh) * 2013-04-18 2013-08-07 山东国威卫星通信有限公司 贴片加载异形辐射单元圆极化平板天线

Also Published As

Publication number Publication date
JPH0766626A (ja) 1995-03-10
IT1260934B (it) 1996-04-29
ITTO930543A0 (it) 1993-07-21
ITTO930543A1 (it) 1995-01-21
AU6342994A (en) 1995-02-02
CA2128454A1 (en) 1995-01-22

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