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EP2608316A1 - Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire - Google Patents

Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire Download PDF

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Publication number
EP2608316A1
EP2608316A1 EP11194331.2A EP11194331A EP2608316A1 EP 2608316 A1 EP2608316 A1 EP 2608316A1 EP 11194331 A EP11194331 A EP 11194331A EP 2608316 A1 EP2608316 A1 EP 2608316A1
Authority
EP
European Patent Office
Prior art keywords
switches
splitter
receiving
emitting
antenna
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Withdrawn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
EP11194331.2A
Other languages
German (de)
English (en)
Inventor
Gerhard RÖTTER
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP11194331.2A priority Critical patent/EP2608316A1/fr
Publication of EP2608316A1 publication Critical patent/EP2608316A1/fr
Withdrawn legal-status Critical Current

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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
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • H01Q9/0435—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave using two feed points
    • 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
    • H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation 

Definitions

  • the invention relates to an arrangement with a advocacynantentenne according to the preamble of patent claim 1.
  • Electromagnetic waves propagate in space depending on the design of the radiating antenna with a fixed polarization.
  • RFID Radio Frequency Identification
  • UHF area surface antennas or patch antennas depending on the design for a fixed polarization direction, z.
  • this has either a linear vertical or horizontal polarization.
  • the orientation of the linear polarization mode can be changed by the mechanical rotation of the antenna unit, for example by 90 °.
  • a circular or elliptical type of polarization can be achieved by the known method of superposing phase-shifted linear polarization types.
  • the spatial position of an RFID tag is variable to a read / write device.
  • the solution of the problem provides for the use of a so-called surface or patch antenna, which has two spatially separate feed points, with which two mutually orthogonal wave propagation modes can be generated.
  • a flexible connection is provided, with a control of the two feed points with preferably equal and mutually phase-shifted by 90 ° portions of the radiation or receiving circularly polarized electromagnetic waves is possible, and according to the invention by switching the same antenna with a linear vertical or horizontal polarization can be operated without the unit must be changed mechanically.
  • an arrangement with an area antenna for emitting or receiving a circularly polarized electromagnetic wave, preferably in the UHF RFID frequency band, proposed, wherein the planar antenna has two spaced-apart feed points, wherein a splitter for dividing a high-frequency signal into two mutually phase-shifted signal components is provided, and wherein each one output of the splitter is connected to one of the feed points.
  • a switch is provided for selectively radiating or receiving a linearly polarized, electromagnetic wave in a signal path between the outputs of the splitter and the feed points of the surface antenna.
  • this arrangement can be operated with a circular, a linear-vertical or with a linear-horizontal polarization without mechanical intervention, so that the provision of separate antennas for linear and circular polarization unnecessary.
  • Another advantage is that the antenna gain for a reference dipole is identical regardless of the polarization.
  • the feed points are arranged in such a way that mutually orthogonal wave propagation modes are produced, wherein advantageously the two signal components to be transmitted or to be received are also phase-shifted by 90 ° relative to one another.
  • the two signal components to be transmitted or to be received are also phase-shifted by 90 ° relative to one another.
  • the antenna has a square designed reference surface and a square designed radiating element.
  • the connection to the spatially separate feed points particularly well mutually orthogonal wave propagation modes (vibration modes) produce.
  • a control device or control electronics for the actuation of the switches, wherein the control device is configured such that for the emission or for receiving a circularly polarized wave, both switches are closed, and that for emitting or receiving a linearly polarized wave in Dependence of a desired orientation of the shaft of one of the two switches is closed.
  • electronic switches are advantageously used, which can be switched accordingly fast, which are wear-free and their operation requires little energy.
  • the switches are designed non-reflective, thereby avoiding that in "open” switch, a reflected back signal in the splitter is superimposed on the signal of the alternative signal path and thus for unwanted interference provides.
  • a retroactive effect on a transmission electronics transmit power amplifier
  • a signal due to the splitter attenuation of the signal (eg by 3dB) can be avoided if the switches are designed as a changeover switch, and if in addition at least two further switches are provided, which are arranged such that in the use of the arrangement for Radiation or for receiving a linearly polarized electromagnetic wave of the splitter is not arranged in the active signal path.
  • the splitter is designed as a passive component such that the arrangement can be used alternatively or alternately for transmitting and / or receiving linearly or circularly polarized electromagnetic waves.
  • the alternate transmission and reception of electromagnetic waves may be enabled by providing two different active splitters, one for the transmit case and one for the receive case, for alternate use.
  • FIG. 1 As antenna A, a planar patch antenna for the UHF range of an RFID application, namely for an RFID read-write device, is shown.
  • the planar antenna consists of a preferably square base area GP (ground plane) and a likewise preferably square radiation element P (patch) arranged above it, wherein two feed points F1, F2 ("feed") spaced apart from one another are arranged on the radiator surface P.
  • the in the FIG. 1 Arrows shown here indicate the oscillation axes resulting from the feed points F1, F2. These are aligned orthogonal to each other, which means that based on the representation in the FIG. 1 by feeding a signal at the feeding point F1, a horizontally polarized electromagnetic wave can be radiated, and by feeding at the feeding point F2, a vertically polarized orientation can be obtained.
  • FIG. 3 a schematic circuit (circuit diagram) is shown, wherein the basis of the FIG. 3 introduced designations and components, if provided with the same reference numerals, to apply to the following drawings.
  • FIG. 3 and the following figures is from the Figures 1 and 2 already known antenna A, wherein the feed points (not shown) F1, F2 via switches SH, SV (switch horizontal, switch vertical) are connected to a splitter SP, said splitter SP with a (not shown) transmitting / receiving electronics a (not shown) RFID read / write device is connected.
  • the splitter SP also referred to as “hybrid coupler / power splitter” shares the signal to be transmitted in two mutually phase-shifted by 90 ° to sub-signals, these sub-signals are passed through the switch SH, SV on the feed points F1, F2. Based on the original signal, the sub-signals are attenuated by at least 3dB, because the splitter SP is a passive component, so that, of course, a maximum of half the original signal strength can be present at each output of the splitter SP. Due to the passive design of the splitter SP can be used unchanged for the reception of electromagnetic waves, which of course reverses the signal flow direction. In the in the FIG.
  • both switches SH, SV are closed, so that due to the orthogonal orientation of the wave propagation modes generated by the feed points F1, F2 and due to the phase shift, which is achieved by the use of the splitter SP, radiated altogether a circularly polarized wave can be received.
  • SV corresponds to the arrangement and mode shown here of the known generation of circularly polarized electromagnetic waves.
  • the switches SH, SV are electronic switches which are used in the examples shown in the FIGS. 3, 4 . 5 be discussed as opener or closer can be executed. They are controlled by means of dashed lines indicated control lines CHC, CVC (circular / linear control, vertical / horizontal control). An unillustrated control electronics or control logic is used for the switching effected by means of the switch SH, SV a polarization, which will be explained with reference to the following drawings.
  • FIG. 4 is the one from the FIG. 3 known arrangement, in which case the switch SH is open, while the switch SV is closed. This results in a sole control of the feed point F2, so that only a vertically-linearly polarized electromagnetic wave is radiated or received by the antenna A.
  • the switch SH is designed non-reflective, which means with the switch SH open, the high-frequency signal led out of the connection "3dB / 0 °" is not reflected back into the splitter SP. This is done by terminating the corresponding line through the open switch SH by means of the characteristic impedance of the feed line. In this constellation, the signal "open” is applied to the switch SH through the control line CHC, while the control line CVC carries the signal "closed".
  • FIG. 5 is that to the FIG. 4 suitable counter-example shown, wherein the switch SV is open and the switch SH is closed, so that a linear-horizontal polarized electromagnetic wave can be radiated or received.
  • SH arrangement for emitting or receiving circularly polarized electromagnetic waves can be switched by means of simple control signals for a linear-horizontal or linear-vertical operating case.
  • the arrangement, in particular the antenna A does not need to be changed mechanically for this purpose.
  • the power divider that is to say the splitter SP
  • SH is correctly terminated in an exemplary embodiment in 50-ohm technology. This leaves a high decoupling of the two signal branches.
  • the circular antenna A shown here has an antenna gain that is about 3dB lower (relative to a reference dipole) than a linear antenna without splitter SP.
  • FIGS. 6 and 7 are different from the arrangement of the FIGS. 3, 4 . 5 additional switches SE ("signal input”) and SL ("switch linear”) are provided.
  • switch SV, SH are now designed as a changeover switch SVL, SHL;
  • the other switches SE, SL are designed as a changeover switch.
  • the sketched control lines are now labeled CLC, VHC (circular-linear control, vertical-horizontal control).
  • switches SE, SL in conjunction with the design of the previous switch as a changeover switch SHL, SVL allows bypassing (shutdown) of the splitter SP in linear polarization. It is in the FIG.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP11194331.2A 2011-12-19 2011-12-19 Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire Withdrawn EP2608316A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11194331.2A EP2608316A1 (fr) 2011-12-19 2011-12-19 Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11194331.2A EP2608316A1 (fr) 2011-12-19 2011-12-19 Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire

Publications (1)

Publication Number Publication Date
EP2608316A1 true EP2608316A1 (fr) 2013-06-26

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EP11194331.2A Withdrawn EP2608316A1 (fr) 2011-12-19 2011-12-19 Agencement doté d'une antenne de surface pour le rayonnement ou la réception d'ondes électromagnétiques polarisées de manière circulaire et linéaire

Country Status (1)

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EP (1) EP2608316A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2993611A1 (fr) * 2014-09-03 2016-03-09 Toshiba TEC Kabushiki Kaisha Lecteur d'étiquette à circuit intégré
CN110098857A (zh) * 2019-03-29 2019-08-06 华为技术有限公司 终端设备的天线切换方法和装置
CN113890582A (zh) * 2021-11-03 2022-01-04 上海航天测控通信研究所 一种自组织方向性网络系统及其通信方法
US20220291395A1 (en) * 2021-03-10 2022-09-15 Qualcomm Incorporated Polarization configurable gnss smartphone antenna
US12019167B2 (en) 2021-09-27 2024-06-25 Qualcomm Incorporated Determining multipath in a positioning system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3523876C1 (de) * 1985-07-04 1986-09-25 Rohde & Schwarz GmbH & Co KG, 8000 München Antennenumschalteinrichtung
EP0703464A2 (fr) * 1994-09-22 1996-03-27 Daimler-Benz Aktiengesellschaft Procédé et système de radar polarimétrique
US20060214853A1 (en) * 2005-03-28 2006-09-28 Toshiba Tec Kabushiki Kaisha Gate antenna
US7535432B1 (en) * 2006-03-14 2009-05-19 Lockheed Martin Corporation Universal antenna polarization selectivity via variable dielectric control
US20100156607A1 (en) * 2008-12-19 2010-06-24 Thomas Lankes Method for activating an RFID antenna and an associated RFID antenna system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3523876C1 (de) * 1985-07-04 1986-09-25 Rohde & Schwarz GmbH & Co KG, 8000 München Antennenumschalteinrichtung
EP0703464A2 (fr) * 1994-09-22 1996-03-27 Daimler-Benz Aktiengesellschaft Procédé et système de radar polarimétrique
US20060214853A1 (en) * 2005-03-28 2006-09-28 Toshiba Tec Kabushiki Kaisha Gate antenna
US7535432B1 (en) * 2006-03-14 2009-05-19 Lockheed Martin Corporation Universal antenna polarization selectivity via variable dielectric control
US20100156607A1 (en) * 2008-12-19 2010-06-24 Thomas Lankes Method for activating an RFID antenna and an associated RFID antenna system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FORSTER, H., FRÄNZ, M., HEINSTADT, J., JUNQUIERA, C., SPLITT, G.: "Optimierung von zirkular polarisierten Microstripantennenelementen", 30 April 1996 (1996-04-30) *
GAO S ET AL: "Polarization-Agile Antennas", IEEE ANTENNAS AND PROPAGATION MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 48, no. 3, 1 June 2006 (2006-06-01), pages 28 - 37, XP001547012, ISSN: 1045-9243, DOI: 10.1109/MAP.2006.1703396 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2993611A1 (fr) * 2014-09-03 2016-03-09 Toshiba TEC Kabushiki Kaisha Lecteur d'étiquette à circuit intégré
JP2016053811A (ja) * 2014-09-03 2016-04-14 東芝テック株式会社 Ｉｃタグ読取装置
CN110098857A (zh) * 2019-03-29 2019-08-06 华为技术有限公司 终端设备的天线切换方法和装置
US11916629B2 (en) 2019-03-29 2024-02-27 Huawei Technologies Co., Ltd. Antenna switching method for terminal device and apparatus
US20220291395A1 (en) * 2021-03-10 2022-09-15 Qualcomm Incorporated Polarization configurable gnss smartphone antenna
US11914050B2 (en) * 2021-03-10 2024-02-27 Qualcomm Incorporated Polarization configurable GNSS smartphone antenna
US12019167B2 (en) 2021-09-27 2024-06-25 Qualcomm Incorporated Determining multipath in a positioning system
CN113890582A (zh) * 2021-11-03 2022-01-04 上海航天测控通信研究所 一种自组织方向性网络系统及其通信方法
CN113890582B (zh) * 2021-11-03 2023-09-29 上海航天测控通信研究所 一种自组织方向性网络系统及其通信方法

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