EP2351149A1 - Eléments de rayonnement à large bande - Google Patents

Eléments de rayonnement à large bande

Info

Publication number
EP2351149A1
EP2351149A1 EP09820095A EP09820095A EP2351149A1 EP 2351149 A1 EP2351149 A1 EP 2351149A1 EP 09820095 A EP09820095 A EP 09820095A EP 09820095 A EP09820095 A EP 09820095A EP 2351149 A1 EP2351149 A1 EP 2351149A1
Authority
EP
European Patent Office
Prior art keywords
radiating element
waveguide section
section
waveguide
patch radiator
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Withdrawn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
EP09820095A
Other languages
German (de)
English (en)
Other versions
EP2351149A4 (fr
Inventor
Bevan Beresford Jones
Peter John Liversidge
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.)
Commscope Technologies LLC
Original Assignee
Argus Technologies Australia Pty 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
Priority claimed from AU2008905334A external-priority patent/AU2008905334A0/en
Application filed by Argus Technologies Australia Pty Ltd filed Critical Argus Technologies Australia Pty Ltd
Publication of EP2351149A1 publication Critical patent/EP2351149A1/fr
Publication of EP2351149A4 publication Critical patent/EP2351149A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/04—Screened antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/06—Waveguide mouths
    • 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
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means

Definitions

  • the present invention relates generally to antennas and in particular to patch antennas.
  • a patch antenna comprises a ground plane, a patch radiator, and a feed.
  • the patch radiator is suspended above the ground plane and fed by a central symmetrical loop or by two loops symmetrically disposed about the centre of the patch in a plane normal to the patch between the patch and the groundplane.
  • the feed excites opposite sides of the patch radiator in antiphase.
  • a wideband radiating element is a wideband patch- fed cavity radiator (antenna) that has wide bandwidth for a relatively constant beamwidth.
  • the wideband radiating element comprises a section of waveguide, a patch radiator, and one or more tuned loops.
  • the waveguide section has a length that is a quarter of a guide wavelength or about a quarter of the guide wavelength, short circuited at one end, and open circuited at the other end to provide a waveguide aperture.
  • the patch radiator is disposed within the waveguide section as a feed for the waveguide section.
  • the one or more tuned loops are coupled to the patch radiator as a feed for the patch radiator in a plane normal to the patch radiator.
  • the width of the waveguide section may be configured to be between about 0.7 wavelengths and about 1.3 wavelengths.
  • the patch radiator is located at a height of 0.125 wavelengths or thereabouts above the short-circuited end of the waveguide section.
  • the waveguide section may have a cross-section along the longitudinal extent of the waveguide section that is square, rectangular, or circular in form.
  • the wideband radiating element may further comprise an additional tuning element.
  • the additional tuning element may comprise a dielectric sheet coupled to the waveguide section.
  • the dielectric sheet may be disposed across at least a portion of the waveguide aperture of the waveguide section, or within the waveguide section.
  • the waveguide section, the patch radiator, and the at least one tuned loop may be configured to radiate over a fifty percent (50%) bandwidth with return loss in excess of 15 dB.
  • the waveguide section, the patch radiator, and the at least one tuned loop coupled together may provide an equal ripple band-pass filter.
  • One tuned loop configured as a feed can be used radiate a single polarization, or two tuned loops orthogonally configured as dual polarization feeds can be used to radiate orthogonal polarizations.
  • the wideband radiating element may further comprise at least one printed circuit board, where a tuned loop is formed on each printed circuit board.
  • Each tuned loop comprises at least one metalised loop, a feed line, and a capacitor coupled in series to the feed line.
  • the feed line may be a microstrip line.
  • the capacitor comprises a section of microstrip or a portion of a coaxial cable.
  • a stand-alone antenna comprising a wideband radiating element can be implemented, or an array antenna comprising a number of wideband radiating elements can be implemented.
  • the array antenna may be configured as a wideband, cellular base-station antenna array.
  • the method comprises the steps of: radiating the signal from at least one tuned loop to a patch radiator, the at least one tuned loop in a plane normal to the patch radiator being a feed for the patch radiator; and radiating the signal from the patch radiator disposed within a section of waveguide section as a feed for the waveguide section, the waveguide section having a length that is a quarter of a guide wavelength or about a quarter of the guide wavelength, the waveguide section being short circuited at one end and open circuited at the other end to provide a waveguide aperture.
  • a method of receiving a signal using a wideband radiating element is provided.
  • the method comprises the steps of: receiving the signal at the patch radiator disposed within a section of waveguide section, the waveguide section having a length that is a quarter of a guide wavelength or about a quarter of the guide wavelength, the waveguide section being short circuited at one end and open circuited at the other end to provide a waveguide aperture; and receiving the signal at at least one tuned loop from a patch radiator, the at least one tuned loop in a plane normal to the patch radiator.
  • Fig. IA is a perspective view of a wideband radiating element in accordance with an embodiment of the invention.
  • Fig. IB is a perspective view of tuned loops for exciting dual linear polarization using microstrip loops in the wideband radiating element of Fig. IA;
  • Fig. 2 is a side elevation view of a wideband radiating element, with a portion of waveguide hidden (shown in cross-section), in accordance with another embodiment of the invention
  • Fig. 3 is a side elevation view of a wideband radiating element, with a portion of waveguide hidden (shown in cross-section), in accordance with a further embodiment of the invention. and -A-
  • Fig. 4 is a side elevation view of a wideband radiating element, with a portion of waveguide hidden (shown in cross-section), in accordance with still another embodiment of the invention.
  • the wideband radiating element is a wideband patch-fed cavity radiator (i.e., an antenna) that comprises a short section of waveguide that is short circuited at one end and open circuited at the other end.
  • the section of waveguide is fed by a patch radiator disposed within the waveguide; in turn, the patch radiator is fed by at least one tuned loop.
  • the tuned loop is disposed in a plane normal to the patch radiator. In this manner, the patch feeds an open waveguide radiator, i.e. the waveguide section.
  • the wideband radiating element can be used to transmit and/or receive signals. The signal can be fed to the tuned loop and radiated from the patch radiator.
  • the patch radiator is a feed for the waveguide section, which radiates the signal from the wideband radiating element to transmit the signal.
  • a signal can be received by the wideband radiating element.
  • the wideband patch-fed cavity radiator can radiate single or dual linear polarization and is a suitable radiating element for wideband, cellular base-station antenna arrays. Patch radiators are commonly used as radiating elements in cellular base station antennas. Arrays covering UMTS and WiMax/LTE bands (1990MHz - 2750 MHz) have been successfully designed using these radiating elements, but the embodiments of the invention are not limited in application to these particular bands. The resulting radiating element, i.e.
  • the wideband patch-fed cavity radiator is capable of operating over a fifty percent (50%) bandwidth with return loss in excess of 15 dB.
  • the variation in radiation pattern across this band is relatively small.
  • a cellular base-station panel antenna designed to have a 65° horizontal beamwidth varies in 3 dB beamwidth by less than ⁇ 7° over a 46% bandwidth.
  • a capacitor or a section of transmission line can be coupled in series to a metalised loop to form a resonating element.
  • One or two tuned loops can be used to obtain a symmetrical feed.
  • the configuration of the wideband radiating element becomes a three or more resonator filter that can be designed to match the impedance of the input transmission line of a feed to the impedance at the open waveguide radiator.
  • the waveguide section has a length that is a quarter of a guide wavelength or about a quarter of the guide wavelength.
  • the width of the waveguide is typically between 0.7 wavelengths and 1.3 wavelengths.
  • the bandwidth of the resulting radiating element is significantly increased by the waveguide section.
  • the waveguide suitably dimensioned, also stabilises the radiation pattern, so that there is minimal variation in radiation pattern across the impedance bandwidth.
  • a dielectric body of suitable thickness, physical characteristics, and dielectric constant can be located within the waveguide as a tuning element to provide adjustment of the Q of the open waveguide radiator and can be used to optimise the impedance characteristics across the band of operation.
  • Dual linear polarization can be achieved by means of two orthogonal crossed loops.
  • An equi-ripple impedance response can be achieved by suitably adjusting the resonant frequencies and couplings between the three resonators, namely the tuned loop, the patch and the waveguide section.
  • the wideband radiating element(s) can be used to implement a stand-alone antenna, or an array antenna comprising a number (e.g., 10) of wideband radiating elements as a cellular base-station antenna array.
  • the wideband radiating element provides a relatively constant beamwidth and wide bandwidth.
  • Fig. IA is a perspective view of a wideband radiating element, or wideband patch- fed cavity radiator, 100 configured with two orthogonal feeds in accordance with an embodiment of the invention.
  • the wideband radiating element 100 comprises a patch radiator 110, two tuned- loop feeds 128, and a section of waveguide 130.
  • portions of the patch 110 and a wall of the waveguide section 130 are removed in the drawing.
  • Fig. IB illustrates, in isolation from other components of the wideband radiating element 100, the two tuned- loop feeds 128(A), 128(B) for exciting dual linear polarization.
  • the printed circuit boards 120 are orthogonally configured relative to each other in a cross- or X-shape when viewed in plan from above.
  • the two tuned loops 128 are differentiated by the parenthetical designations A and B.
  • Each tuned loop 128 comprises a pair of metalised loops 124 formed on one planar surface of the printed circuit board 120 and microstrip lines 122 and series capacitors 126 are formed on the opposite planar surface of the printed circuit board 120.
  • the microstrip lines 122 and series capacitors 126 are implemented by sections of microstrip in this embodiment.
  • the microstrip line feeds 122 are configured in antiphase, as best seen on printed circuit board 120(A) in Fig. IB.
  • the depicted waveguide section 130 is square in cross-section (viewed from above in plan) and is made of conductive material(s), e.g. metal.
  • the waveguide section 130 can alternatively have a cross-section along the longitudinal extent of the section that is rectangular or circular in form, for example.
  • the waveguide section 130 has a length (L) that is a quarter of a guide wavelength or approximately that length (in a vertical direction as depicted in Fig. IA).
  • the waveguide section 130 is short circuited at one end 132 (bottom surface) and open circuited at the other end 134 where radiation of the wideband radiating element 100 occurs.
  • the printed circuit boards 120 are fastened or connected to the short circuited portion 132 of the waveguide section 130. As seen best in Fig.
  • the printed circuit boards have tabs 150 formed on opposite sides of the boards 120.
  • the bottom tabs can be used for interlocking engagement with holes (not shown) formed in the shorted section 132 of the waveguide section 130 and for electrical interconnection with the waveguide section 130.
  • the tabs 150 should be connected to (soldered to) the patch radiator 110 and the shorted section 132 of the waveguide section 130.
  • the patch radiator 110 is a thin, circular plate or disc made of a conductive material, e.g. metal, but other shapes can be practiced.
  • the patch radiator 110 is connected to the printed circuit boards 120 on which the loops 124 are formed by interlocking engagement of the tabs 150 shown in Fig. IB with corresponding holes (not shown) in the patch radiator 110. Electrical interconnection between the loops 124 and the patch radiator 110 is also formed.
  • the patch radiator 110 may be soldered to the printed circuit boards 120. However, in an alternative configuration, the patch radiator 110 may be separately supported for example by plastic posts (not shown).
  • the patch radiator 110 is suspended above the shorted portion 132 of the waveguide section 130 and is in concentric alignment with the waveguide aperture provided by the open circuited portion 134 of the waveguide section 130.
  • the shorted portion 132 of the waveguide section 130 functions as a groundplane.
  • the patch radiator is fed by a tuned loop in a plane normal to the patch.
  • the patch radiator 110 is fed by two tuned loops 128(A), 128(B) formed on respective printed circuit boards 120 in planes normal to the patch 110.
  • Series resonant circuits are formed by the inductances of the metalised loops 124 with series capacitances implemented as sections of microstrip lines 126.
  • the series capacitance can be implemented in a variety of ways, including as a lumped capacitor or a short section of transmission line, such as coaxial cable or microstrip line.
  • the tuned loop 128(B) is coupled to a coaxial cable 160 in Fig.
  • IB comprises microstrip line feeds 122, the pair of metalised loops 124(B), and the series capacitances 126.
  • the coaxial cable is not depicted in Fig. IA.
  • the feeds 122 and series capacitances 126 for the tuned loop 128(B) are not shown in Fig. IB, because those components of the tuned loop 128(B) are on the opposite side of printed circuit board 120(B), which is not visible in Fig. IB.
  • the counterpart parts 122(A), 126(A) of the other tuned loop 128(A) are visible.
  • Another coaxial cable feed behind the printed circuit board 120(A) is not visible in Fig. IB.
  • the coaxial cable 160 is used to make an external connection to the radiating element 100. A portion of the outer plastic sheath of the cable 160 is removed to expose the inner conductive shield of the coaxial cable, which is attached (soldered) to the metalisation of the loop 124(B). The centre conductor of the coaxial cable 160 is connected to the microstrip lines 122 (not visible) of the tuned loop 128B on the opposite side through the printed circuit board 120(B). The patch 110 and the tuned loop(s) 128 form a pair of coupled resonators.
  • This configuration (without the waveguide section 130) can be used as a radiating element.
  • a two-resonator filter can be designed to obtain a double-tuned return loss response.
  • the two orthogonal loops 128(A), 128(B) are used to provide a dual- polarised antenna.
  • the two polarizations are radiated across the two diagonals defined by the corners of the square waveguide.
  • a 25 - 30% impedance bandwidth at 18 dB return loss can be obtained in this way with a patch 110 located at a height of 0.125 wavelengths above a groundplane. Increased height of the patch 110, while increasing bandwidth leads to variation and degradation in the radiation pattern.
  • the wideband radiating element 100 may also incorporate one or more tuning elements.
  • the additional tuning element may be, for example, a dielectric sheet (not shown in Fig. 1) coupled to the waveguide section, across at least a portion of the waveguide aperture 134 or within the waveguide section 130.
  • the dielectric sheet may be a solid plastic body, or a plastic body with patterned apertures formed in the body, adapted to fit within the waveguide section or across the waveguide aperture as a cover.
  • pieces of metal may be located in the waveguide for example as etched shapes on printed circuit boards placed in the waveguide. Holes can be formed in the waveguide section 130 (e.g., in the shorted section 132) for external connection to the microstrip line 122 feeding the loops 124. Changes can be made to the embodiment depicted in Fig. 1 to provide additional embodiments of the invention as shown in
  • Fig. 2 illustrates another wideband radiating element 200, i.e. a wideband patch- fed cavity radiator, with a single tuned- loop feed 128 implemented using a single loop 224 and a transmission line or a coaxial cable 226 (e.g., 50 ohm cable) in accordance with a further embodiment of the invention.
  • a wideband radiating element 200 i.e. a wideband patch- fed cavity radiator
  • a single tuned- loop feed 128 implemented using a single loop 224 and a transmission line or a coaxial cable 226 (e.g., 50 ohm cable) in accordance with a further embodiment of the invention.
  • a coaxial cable 226 e.g., 50 ohm cable
  • the configurations and details of the patch radiator 210 and the waveguide section 230 are the same as those of the patch radiator 110 and the waveguide section 130 of Fig. 1.
  • the patch radiator 210 may be suspended above the tuned loop 228 by plastic posts (not shown), for example.
  • the tuned loop 228 is formed again in a plane orthogonal to that of the patch radiator 210.
  • the loop 224 may be implemented as etched cladding on a printed circuit board 220 and is similar in function but different in configuration to the loops 124 of Fig. 1.
  • the printed circuit board 220 is connected or fastened to the shorted section of the waveguide section 230.
  • a portion of the loop 224 is formed using the shorted section 232 of the waveguide 230, and the remainder of the loop 224 is formed by the cladding on the same side of the printed circuit board 220 (facing the viewer in Fig.
  • a small gap 229 is formed in the loop 224.
  • Small tabs 250 are optionally formed in the loop 224. The tabs 250 are useful for adjusting the coupling of the tuned-loop
  • the loop 224 is excited across the gap 229.
  • a piece of coaxial cable 260 used to feed the radiating element 200 is brought up one side of the loop 224 (left side in
  • the exposed centre conductor 240 of the coaxial cable 260 spans the gap 229 in the loop 224 and is connected to the other side of the loop 224 through a capacitor.
  • the capacitor is implemented as a short open-circuit section 242 of the same cable 260 with its conductive shield connected to the other side of the loop 224.
  • the length of this short section of coaxial cable 242 is selected to resonate with the inductance of the loop 224.
  • the cable 260 is introduced through a hole in the shorted section 232 of the waveguide section230. A portion of the external insulator cladding of the cable 260 is shown as white body in Fig. 2.
  • a single-tuned loop 228 is formed on the printed circuit board 220 for a single polarisation in the embodiment of Fig. 2.
  • the wideband radiating element 200 of Fig. 2 can be modified for dual polarisation by the provision of another tuned loop similarly configured on another printed circuit, which can be orthogonally configured relative to the depicted printed circuit board 220.
  • Fig. 3 illustrates a wideband radiating element 300, i.e. a wideband patch-fed cavity radiator, with a microstrip implementation of a single-tuned loop feed 328 in accordance with yet another embodiment of the invention.
  • This configuration of the wideband radiating element 300 is similar to that of Fig. 2, with the principal difference being the use of microstrip 322, 326 in place of the coaxial cable 260, 242 in Fig. 2.
  • the configurations of the patch radiator 310 and the waveguide section 330 are the same as those of the patch radiator 110, 210 and the waveguide section 130, 230 of Figs. 1 and 2.
  • the patch radiator 310 is suspended above a single printed circuit board 320, which can be done using plastic posts (not shown), for example.
  • the tuned loop 328 is formed in a plane orthogonal to that of the patch radiator 310.
  • a printed circuit board 320 is connected or fastened to the shorted section 332 of the waveguide section 330.
  • the metalised loop 324 is formed on the rear surface (indicated by dashed lines) of a printed circuit board 320 and has the same function and a similar configuration to the loop 224 of Fig. 2.
  • a portion of the loop 324 is formed using the shorted section 332 of the waveguide 330.
  • a small gap 329 is formed in the loop 324.
  • a microstrip track 322 (facing the viewer) is formed on the printed circuit board 320 and is used to feed the loop 324 implemented on the opposite side of the board 320 in Fig.3.
  • the microstrip track 322 overlays the corresponding portion of the loop 328 formed on the opposite side of the printed circuit board.
  • a short length 340 of the microstrip track 322 extends across the gap 329 in the loop 324.
  • the capacitor 326 is formed of microstrip track on the other side of the loop 324.
  • the microstrip line 322 may be fed from another printed circuit board below the waveguide section 330 through a hole in the shorted section 332 of the waveguide section 330, or alternatively by means of a coaxial cable through a hole in the shorted section 332 of the waveguide section 330, for example.
  • the section 326 of microstrip track 322 to implement the capacitor is selected to resonate with the inductance of the loop 324.
  • wideband radiating element 300 of Fig. 3 implements a single polarization
  • this embodiment can be readily modified to implement dual polarization.
  • Fig. 4 illustrates a wideband radiating element 400 with a different microstrip implementation having two loops 424 fed in antiphase in accordance with a further embodiment of the invention.
  • the configurations of the patch radiator 410 and the waveguide section 430 are the same as those of the patch radiator 110 and the waveguide section 130 of Fig. 1.
  • the patch radiator 410 is mounted onto a single printed circuit board 420, which is connected or fastened to the shorted section of the waveguide section 430.
  • This configuration is basically the same as that shown in Fig. 1, but has a single tuned-loop 428 for a single polarization rather than two tuned loops 128(A), 128(B) for dual polarisation.
  • Two microstrip circuits 422 are formed in antiphase on a planar surface of the printed circuit board 420 to provide the two tuned loops 428, each comprising an inductance and capacitance in series.
  • Two loops 424 with gaps 429 are implemented as metallisation on the reverse side of the board 420. Again, short lengths of track 440 extend across the gaps 429 in the loops 424.
  • Series capacitors 426 implemented with microstrip are formed on the other sides of the loops 424.
  • a black dot in Fig. 4 indicates where an external connection (not shown) is made to the microstrip lines 422.

Landscapes

  • Waveguide Aerials (AREA)

Abstract

La présente invention concerne des éléments de rayonnement à large bande (100, 200, 300, 400), des procédés de transmission et de réception de signaux qui utilisent un élément de rayonnement à large bande (100, 200, 300, 400), des antennes autonomes, et des antennes réseaux. L’élément de rayonnement à large bande (antenne) (100, 200, 300, 400) possède une grande largeur de bande pour une largeur de bande relativement constante et comprend une section guide d’ondes (130, 230, 330, 430), un élément rayonnant à plaque (110, 210, 310, 410), et une ou plusieurs boucles accordées (128, 228, 328, 428). La longueur de la section guide d’ondes (130, 230, 330, 430) mesure environ un quart de longueur d’onde dans le guide, ladite section est court-circuitée à une extrémité (132, 232, 332, 432), et en circuit ouvert à l’autre extrémité (134). L’élément rayonnant à plaque (110, 210, 310, 410) est disposé à l’intérieur de la section guide d’ondes (130, 230, 330, 430). Les boucles accordées (128, 228, 328, 428) sont couplées à l’élément rayonnant à plaque (110, 210, 310, 410) en tant que source pour l’élément rayonnant à plaque (110, 210, 310, 410) dans un plan normal à l’élément rayonnant à plaque (110, 210, 310, 410). La largeur de la section guide d’ondes (130, 230, 330, 430) peut être entre environ 0,7 longueur d’onde et environ 1,3 longueur d’onde et la plaque (110, 210, 310, 410) peut être située à une hauteur d’environ 0,125 longueur d’onde au-dessus de l’extrémité court-circuitée (132, 232, 332, 432) de la section guide d’ondes (130, 230, 330, 430).
EP09820095A 2008-10-15 2009-10-12 Eléments de rayonnement à large bande Withdrawn EP2351149A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2008905334A AU2008905334A0 (en) 2008-10-15 Wideband radiating elements
PCT/AU2009/001343 WO2010042976A1 (fr) 2008-10-15 2009-10-12 Eléments de rayonnement à large bande

Publications (2)

Publication Number Publication Date
EP2351149A1 true EP2351149A1 (fr) 2011-08-03
EP2351149A4 EP2351149A4 (fr) 2012-12-26

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EP09820095A Withdrawn EP2351149A4 (fr) 2008-10-15 2009-10-12 Eléments de rayonnement à large bande

Country Status (3)

Country Link
EP (1) EP2351149A4 (fr)
CN (1) CN102224637A (fr)
WO (1) WO2010042976A1 (fr)

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CN110911822A (zh) * 2018-09-18 2020-03-24 宁波博测通信科技有限公司 多天线阵列单元
WO2021000147A1 (fr) * 2019-06-30 2021-01-07 瑞声声学科技(深圳)有限公司 Élément de rayonnement et antenne
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Also Published As

Publication number Publication date
CN102224637A (zh) 2011-10-19
WO2010042976A1 (fr) 2010-04-22
EP2351149A4 (fr) 2012-12-26

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