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WO2013007868A1 - Agencement d'antenne cadre - Google Patents

Agencement d'antenne cadre Download PDF

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Publication number
WO2013007868A1
WO2013007868A1 PCT/FI2011/050652 FI2011050652W WO2013007868A1 WO 2013007868 A1 WO2013007868 A1 WO 2013007868A1 FI 2011050652 W FI2011050652 W FI 2011050652W WO 2013007868 A1 WO2013007868 A1 WO 2013007868A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
switch
antenna
antenna structure
loop 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.)
Ceased
Application number
PCT/FI2011/050652
Other languages
English (en)
Inventor
Olivier Pajona
Jaakko KYLLÖNEN
Zlatoljub Milosavljevic
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.)
Amphenol Finland Oy
Original Assignee
Amphenol Finland Oy
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 Amphenol Finland Oy filed Critical Amphenol Finland Oy
Priority to EP11869314.2A priority Critical patent/EP2732504A4/fr
Priority to PCT/FI2011/050652 priority patent/WO2013007868A1/fr
Publication of WO2013007868A1 publication Critical patent/WO2013007868A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q7/005—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 with variable reactance for tuning the antenna
    • 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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length

Definitions

  • the present invention relates to a folded loop antenna with a switch circuit for establishing connection between the antenna structure and the ground or any other sub circuit of an electronic apparatus.
  • Different small embedded antennas are used in wireless communication devices such as in radio telephones, personal base stations, portable handsets, personal digital assistants, MP3 players, video players and other small, compact and lightweight communication terminals.
  • the number of antennas in each device is increasing as well as the number of available wireless services such as Global System for Mobile Communications (GSM), Distributed Control System (DCS), Personal Communications Service (PCS), UW, Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H), Wireless Fidelity (Wifi), Bt, Worldwide Interoperability for Microwave Access (Wimax), Long Term Evolution (LTE), Global Positioning System (GPS) etc.
  • GSM Global System for Mobile Communications
  • DCS Distributed Control System
  • PCS Personal Communications Service
  • UW Digital Video Broadcasting-Terrestrial/Handheld
  • Wifi Wireless Fidelity
  • Bt Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • GPS Global Positioning System
  • embedded antennas need to be small
  • One of these available antennas is a small folded loop antenna designed to provide the capability to create several resonances, in low band ( ⁇ 1 GHz) and up to six resonances in high bands (1 ,5 GHz to 3 GHz bands).
  • This folded loop antenna has drawbacks, for example, a narrow bandwidth of the low band resonance.
  • a 2G/3G/LTE antenna needs to cover from 698 MHZ to 964 MHz, from 1710 MHz to 2170 MHz and from 2500MHz to 2690 MHz.
  • the very wide low frequency band (698MHZ to 964MHz) may not be coverable with good Return Loss (RL) ⁇ -6dB and high efficiency by the low band resonance of the folded loop antenna.
  • RL Return Loss
  • Another drawback is that only one of the different resonances of the folded loop antenna located in the high band (1710 MHZ to 2170 MHZ) is coming from a balanced (non-radiating) mode. Therefore only one resonance (and so one limited portion of the high band) may benefit of the advantages of the balanced mode, for example, lower losses from the head when the phone is in "beside head" position, lower HAC and SAR values.
  • SAR Specific Absorption Rate
  • HAC Hearing Aid Compatibility
  • the invention relates to an antenna structure comprising at least one folded loop antenna element, a radiator, and at least one active switch circuit for establishing a connection between the antenna structure and the ground or other sub circuit of an electronic apparatus, wherein the antenna structure is a high performance antenna providing high efficiency, higher immunity to the losses created by the head effect when the device is used beside the head, wide bandwidths, low Specific Absorption Rate (SAR) and low Hearing Aid Compatibility (HAC).
  • SAR Specific Absorption Rate
  • HAC Hearing Aid Compatibility
  • an antenna structure for a wireless communication device comprising a folded loop antenna radiator comprising a signal feeding point at the first end of the loop antenna and at least one contact point at the second end of the loop antenna.
  • At least one switch circuit is electrically connected to the contact point of the loop antenna.
  • the switch circuit comprises at least a first switch path with a load and a second switch path with a load, wherein the load of the first switch path is different from the load of the second switch path.
  • the folded loop antenna radiator is connectable to a ground plane or a sub circuit of an electronic device through one of the switch paths.
  • the switch circuit is a switch, a diode, a varactor, a capacitor bank, a Micro Electrical Mechanical System (MEMS).
  • MEMS Micro Electrical Mechanical System
  • the load is a simple load.
  • the simple load is a resistor, inductor, capacitor, short end or open end.
  • the load is a complex load.
  • the complex load is a combination of the simple loads, wherein the simple loads are connected in parallel or in series.
  • Fig. 1 shows a block diagram of an antenna structure according to an example embodiment
  • Fig. 2 shows a plane view of an antenna structure according to an example embodiment; and shows a block diagram of a switch of an antenna structure according to an example embodiment.
  • an antenna structure comprising at least one antenna element, radiator, and at least one switch circuit. It is to be noted, however, that the invention is not limited to a number of antenna radiators or type or number of switch circuits. In fact, the different embodiments have applications widely in any environment where antenna structures are required.
  • Fig. 1 shows an antenna structure 1 00 according to an embodiment of the invention.
  • the antenna structure 1 00 comprises an antenna element i.e. an antenna radiator 1 01 and a switch circuit 1 02.
  • the antenna radiator 1 01 has a signal feeding point 1 03 and a contact point.
  • the feeding point 1 03 is located at the beginning (first end) of the loop of the radiator 1 01 while the contact point is located near the end (second end) of the radiator 1 01 .
  • the end of the radiator 1 01 , the contact point is electrically connected to the circuit 1 02.
  • the circuit 1 02 comprises at least two switch paths comprising at least one simple load.
  • the simple load may be, for example, a resistor 1 05, an inductor 1 06, a capacitor 1 07, a short end 1 08 or an open end 1 09.
  • the switch path may also comprise any complex load, wherein the complex load may be any combination of the simple loads 1 05, 1 06, 1 07, 1 08, 1 09 or it may also comprise more than one same kind of simple loads or a combination of simple loads, wherein there are more than one same kind of simple loads.
  • Two or more simple loads may be connected in parallel or in series. Loads of each switch path are different or at least a load of at least one switch path is different from the load of at least one other switch path of a switch circuit.
  • the end of the radiator 101 can be electrically connected to a ground plane 1 04 of an electronic device instead of connecting the end of the radiator 101 directly to the ground plane 104 of an electronic device.
  • the circuit 102 connected at the end of the radiator 101 may be, for example, a switch, a diode, a varactor, a capacitor bank, a Micro Electrical Mechanical System (MEMS) or any other circuit which can provide a tunable impedance load at the end of the loop antenna radiator 101 .
  • the switch may be realized in any type of technology such as gallium arsenide (GaAs), Complementary Metal-Oxide Semiconductor (CMOS), Silicon On Sapphire (SOS) or Micro-Electro- Mechanical Systems (MEMS). It may be Single-Port N-throw (SPnT) type, meaning that the number of states is n, wherein the n may be 1 ,2,3 or more.
  • the impedance and electrical length of the loop of the radiator 101 can be controlled and tuned.
  • tuning states may also be used to cover different part of the low band or high band in order to achieve optimum performance on specific portions of each band.
  • the typical bands covered by the antenna are, for example, GSM frequency bands: 850, 900, 1800 or 1900 MHz, Wideband Code Division Multiple Access (WCDMA) bands: 21 10 to 2170 MHz (Bands I), 1930 to 1990 MHz (Band II), 869 to 894 MHz (Band V), or 925 to 960 MHz (Band VIII), and Long Term Evolution (LTE) bands: 4, 17 1 , 3, 7, 8, or 20.
  • GSM frequency bands 850, 900, 1800 or 1900 MHz
  • WCDMA Wideband Code Division Multiple Access
  • Bands I 21 10 to 2170 MHz
  • Band II 1930 to 1990 MHz
  • Band VIII Long Term Evolution
  • LTE Long Term Evolution
  • the antenna structure 100 may be smaller with same level of performances or the antenna structure 100 may provide better performances within a given volume.
  • Fig. 2 shows a plane view of an antenna structure 200 according to an example embodiment.
  • the antenna structure 200 comprises a folded loop antenna radiator 201 and a switch circuit 202.
  • the switch circuit 202 is electrically connected to the end of the antenna radiator 201 , to a connection point. Signal is applied to the antenna structure 200 at its feed point 204.
  • the antenna radiator 201 is realized in flex foil technology. However, it is also possible to realize the antenna radiator using Metal sheet technology, LDS technology, Two shot molding MID technology, or any other method.
  • Fig. 3 shows a block diagram of an example of a switch circuit 300 of an antenna structure according to an example embodiment.
  • the switch circuit 300 is a switch circuit with a Single-Pole Four-Throw (SP4T) switch 301 .
  • Impedance loads of the four switch paths 304, 305, 306, 307 may be, for example, short-circuit, open end, inductance, capacitance, or any other complex reactive circuit, as series LC or parallel LC. Again the switch paths 304, 305, 306, 307 have different kinds of loads. However, it is also possible that only one switch path has a different kind of load in comparison to the other switch paths.
  • Either a folded loop antenna radiator or a switch circuit or both may be designed to avoid undesired switching in one band.
  • a low-pass filter may be added at the input of the switch circuit. The low pass filter prevents a high-band signal from passing through the switch circuit and thus the high-band will remain unchanged.
  • An antenna structure according to this invention may have any shape necessary to comply with the dimensional requirements of the wireless communication device in which the antenna structure is adapted for use.
  • the antenna radiator and the switch circuit may also have any shape necessary to comply with the functional and electrical requirements of the wireless communication device in which the antenna structure is suitable for use.

Landscapes

  • Details Of Aerials (AREA)

Abstract

L'invention se rapporte à une structure d'antenne (100) destinée à un dispositif de communication sans fil comprenant un radiateur (101) d'antenne cadre replié qui comprend un point d'acheminement de signal (103) et un point de contact dans lequel un circuit de commutation (102) est électriquement connecté. Le circuit de commutation (102) comprend au moins deux chemins de commutation ayant des types de charges différents (105, 106, 107, 108, 109). Le radiateur (101) d'antenne cadre replié peut être connecté à un plan de mise à la terre (104) ou à un sous-circuit d'un dispositif de communication par le biais de l'un des chemins de commutation.
PCT/FI2011/050652 2011-07-13 2011-07-13 Agencement d'antenne cadre Ceased WO2013007868A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11869314.2A EP2732504A4 (fr) 2011-07-13 2011-07-13 Agencement d'antenne cadre
PCT/FI2011/050652 WO2013007868A1 (fr) 2011-07-13 2011-07-13 Agencement d'antenne cadre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/050652 WO2013007868A1 (fr) 2011-07-13 2011-07-13 Agencement d'antenne cadre

Publications (1)

Publication Number Publication Date
WO2013007868A1 true WO2013007868A1 (fr) 2013-01-17

Family

ID=47505556

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2011/050652 Ceased WO2013007868A1 (fr) 2011-07-13 2011-07-13 Agencement d'antenne cadre

Country Status (2)

Country Link
EP (1) EP2732504A4 (fr)
WO (1) WO2013007868A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014117738A1 (fr) * 2013-02-04 2014-08-07 华为终端有限公司 Appareil d'antenne et dispositif terminal
US10448173B2 (en) 2017-10-16 2019-10-15 Widex A/S Antenna for a hearing assistance device
WO2020024675A1 (fr) * 2018-08-03 2020-02-06 瑞声声学科技(深圳)有限公司 Système à antenne cadre et borne mobile
US10743119B2 (en) 2017-10-16 2020-08-11 Widex A/S Antenna for a hearing assistance device
US10750295B2 (en) 2017-10-16 2020-08-18 Widex A/S Antenna for a hearing assistance device
US10820123B2 (en) 2017-10-16 2020-10-27 Widex A/S Antenna for a hearing assistance device
CN113131187A (zh) * 2021-04-01 2021-07-16 重庆传音通讯技术有限公司 可折叠移动终端、天线控制方法及可读存储介质
CN113471672A (zh) * 2016-08-29 2021-10-01 三星电子株式会社 包括多频带天线的可穿戴装置
US11223109B2 (en) 2017-10-16 2022-01-11 Widex A/S Antenna for a hearing assistance device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08154012A (ja) * 1994-11-28 1996-06-11 Matsushita Electric Ind Co Ltd 携帯無線機
JPH10322249A (ja) * 1997-05-15 1998-12-04 Nippon Signal Co Ltd:The ループアンテナ伝送装置
US20090251383A1 (en) * 2004-12-16 2009-10-08 Panasonic Corporation Polarization switching antenna device
EP2219265A1 (fr) * 2009-02-12 2010-08-18 Laird Technologies AB Dispositif d'antenne, système d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003277639A1 (en) * 2002-11-18 2004-06-15 Yokowo Co., Ltd. Antenna for a plurality of bands
JP5275369B2 (ja) * 2009-08-27 2013-08-28 株式会社東芝 アンテナ装置及び通信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08154012A (ja) * 1994-11-28 1996-06-11 Matsushita Electric Ind Co Ltd 携帯無線機
JPH10322249A (ja) * 1997-05-15 1998-12-04 Nippon Signal Co Ltd:The ループアンテナ伝送装置
US20090251383A1 (en) * 2004-12-16 2009-10-08 Panasonic Corporation Polarization switching antenna device
EP2219265A1 (fr) * 2009-02-12 2010-08-18 Laird Technologies AB Dispositif d'antenne, système d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2732504A4 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014117738A1 (fr) * 2013-02-04 2014-08-07 华为终端有限公司 Appareil d'antenne et dispositif terminal
US9634385B2 (en) 2013-02-04 2017-04-25 Huawei Device Co., Ltd. Antenna apparatus and terminal device
CN113471672B (zh) * 2016-08-29 2024-04-16 三星电子株式会社 包括多频带天线的可穿戴装置
US11955701B2 (en) 2016-08-29 2024-04-09 Samsung Electronics Co., Ltd Wearable device including multi-band antenna
CN113471672A (zh) * 2016-08-29 2021-10-01 三星电子株式会社 包括多频带天线的可穿戴装置
US10750295B2 (en) 2017-10-16 2020-08-18 Widex A/S Antenna for a hearing assistance device
US10743119B2 (en) 2017-10-16 2020-08-11 Widex A/S Antenna for a hearing assistance device
US10820123B2 (en) 2017-10-16 2020-10-27 Widex A/S Antenna for a hearing assistance device
US10674288B2 (en) 2017-10-16 2020-06-02 Widex A/S Antenna for a hearing assistance device
US11223109B2 (en) 2017-10-16 2022-01-11 Widex A/S Antenna for a hearing assistance device
US10448173B2 (en) 2017-10-16 2019-10-15 Widex A/S Antenna for a hearing assistance device
WO2020024675A1 (fr) * 2018-08-03 2020-02-06 瑞声声学科技(深圳)有限公司 Système à antenne cadre et borne mobile
CN113131187A (zh) * 2021-04-01 2021-07-16 重庆传音通讯技术有限公司 可折叠移动终端、天线控制方法及可读存储介质

Also Published As

Publication number Publication date
EP2732504A1 (fr) 2014-05-21
EP2732504A4 (fr) 2015-04-22

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