WO2010047505A2 - 액티브 안테나를 이용한 안테나 다이버시티 시스템 - Google Patents
액티브 안테나를 이용한 안테나 다이버시티 시스템 Download PDFInfo
- Publication number
- WO2010047505A2 WO2010047505A2 PCT/KR2009/006027 KR2009006027W WO2010047505A2 WO 2010047505 A2 WO2010047505 A2 WO 2010047505A2 KR 2009006027 W KR2009006027 W KR 2009006027W WO 2010047505 A2 WO2010047505 A2 WO 2010047505A2
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- WIPO (PCT)
- Prior art keywords
- antenna
- active
- frequency band
- diversity
- circuit unit
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
Definitions
- the present invention relates to an antenna, and more particularly, to an antenna diversity system using an active antenna.
- a mobile terminal has been required to have a small size and a light weight, and to receive a mobile communication service having a different frequency band using a single terminal.
- CDMA services in the 824-894 MHz band commercially available in Korea
- PCS services in the 1750-1870 MHz band CDMA services in the 832-925 MHz band commercially available in Japan
- the 1850-1990 MHz band commercially available in the US.
- Multi-band signal as needed among mobile communication services using various frequency bands such as PCS service, GSM service of 880 ⁇ 960 MHz band commercialized in Europe, China, and DCS service of 1710 ⁇ 1880 MHz band commercialized in some parts of Europe.
- a terminal that can be used at the same time, and in addition to the situation is required a complex terminal that can use services such as Bluetooth, Zigbee, WLAN, GPS.
- convergence terminals providing all services having various frequency bands are a major trend of mobile communication terminals, and miniaturization of terminals is continuously required.
- the number of antennas is inevitably increased, thereby increasing the size of the terminal.
- diversity antennas are used to mitigate high-speed fading caused by multipath signal propagation in the wireless communication field, particularly in the mobile communication field.
- the diversity antenna is used to stably receive a signal having the same signal but different fading characteristics.
- the size of the terminal increases as the number of antennas increases.
- the present invention proposes a diversity antenna system using an active antenna that can utilize a diversity antenna without increasing the size of the terminal.
- Another object of the present invention is to propose a diversity antenna system utilizing an active antenna as a diversity antenna.
- a first antenna for transmitting and receiving a signal of a first frequency band
- a second antenna for transmitting and receiving a signal of a second frequency band
- an active circuit unit implemented as active elements, wherein in the first mode, the second antenna operates as a passive antenna, and in the second mode, the second antenna is electrically connected to the active circuit unit and operates as an active antenna.
- the resonance band of the second antenna is the first frequency band.
- the second antenna operates as a diversity antenna for the first frequency band.
- the first frequency band may be a mobile communication service frequency band and the second frequency band may be a Bluetooth band.
- the first antenna for transmitting and receiving signals of the first frequency band; A first frequency RF circuit unit for processing an RF signal of a first frequency band; A second antenna for transmitting and receiving a signal of a second frequency band; A second frequency RF circuit unit for processing an RF signal of a second frequency band; An active circuit unit implemented with active elements; And a switching unit for switching the connection between the second antenna and the active circuit unit and the connection between the second antenna and the second frequency RF circuit unit.
- the diversity antenna can be utilized without increasing the size of the terminal, and there is an advantage that the active antenna can be used as the diversity antenna.
- FIG. 1 is a conceptual diagram illustrating a diversity antenna system of a mobile communication terminal using an active antenna according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an antenna diversity system of a mobile communication terminal for using an antenna of a Bluetooth band as a diversity antenna for a CDMA band.
- FIG. 3 is a diagram illustrating a power feeding method of a second antenna coupled to an active circuit unit according to an embodiment of the present invention
- FIG. 4 is a graph showing the VSWR of the second antenna when the active circuit portion of the present invention is coupled and the VSWR of the second antenna when operating as a passive antenna without the active circuit portion coupled;
- FIG. 1 is a conceptual diagram illustrating an antenna diversity system of a mobile communication terminal using an active antenna according to an embodiment of the present invention.
- an antenna diversity system of a mobile communication terminal using an active antenna includes an active circuit unit coupled to a first antenna 100, a second antenna 102, and a second antenna ( 114).
- the first antenna 100 is an antenna for receiving a signal of a preset first frequency band.
- the first antenna includes both an internal antenna and an external antenna.
- the first antenna transmits and receives a signal of a first frequency band.
- the first antenna may be an antenna that transmits and receives a general mobile communication frequency signal such as CDMA / GSM.
- the second antenna 102 is installed spaced apart from the first antenna 100 by a predetermined distance.
- the second antenna 102 operates as an antenna for receiving a signal of a second preset frequency band in the first mode.
- the second antenna may also include both an internal antenna and an external antenna.
- the second antenna may be an antenna for transmitting and receiving a signal of the Bluetooth band in the first mode.
- the first antenna 100 operates as an antenna for transmitting and receiving signals in the first frequency band
- the second antenna 102 operates as an antenna for transmitting and receiving signals in the second frequency band.
- the first frequency band is a lower frequency band than the second frequency band
- the radiator of the first antenna 100 is larger in size than the second antenna 102.
- the second antenna 102 is electrically connected to the active circuitry 114 and operates as an active antenna.
- An active antenna is an antenna system in which an active element is included and an antenna whose characteristics and performance are controlled by the active element.
- the second antenna 102 may operate as an antenna that resonates in a band lower than the length of the radiator.
- the active circuit 114 includes an amplification module, and the amplification module performs impedance matching and amplifies weak signals so that resonance points are formed in a lower band than when the antenna is manually operated.
- FIG. 3 is a diagram illustrating a power feeding method of a second antenna coupled to an active circuit unit according to an exemplary embodiment of the present invention.
- a first frequency signal or a second frequency signal is supplied to the second antenna 102, and either frequency signal is supplied through switching or received through the second antenna.
- the second frequency signal f2 is fed in front of the active circuitry 114 so that it is not affected by the active circuitry 114 and the second antenna operates as a passive antenna.
- the first frequency signal f1 is input to the active circuit unit 114 and fed to the second antenna 102. At this time, the active circuit 114 lowers the resonance frequency of the second antenna through impedance conversion and amplifies the signal.
- FIG 4 is a graph showing the VSWR of the second antenna when the active circuit unit is coupled with the VSWR of the second antenna when the active circuit unit is not coupled and is operated as a passive antenna.
- a resonance point is formed in a relatively high frequency band, but when coupled to the active circuit unit, a resonance point is formed in a low frequency band.
- the second antenna 102 operating as the active antenna in the second mode has a resonance band formed in the first frequency band. That is, by the active circuit 114, the second antenna 102 operates in the same frequency band as the first antenna and acts as a diversity antenna for the first frequency band.
- an antenna used in another service band can be used as a diversity antenna by implementing an active antenna as a diversity antenna. It does not require a separate antenna for the implementation and can implement antenna diversity in a small size in the mobile communication terminal.
- the switching of the first mode and the second mode may be implemented in various ways, for example, the switching of the first mode and the second mode may be made using general switching means.
- FIG. 2 is a diagram illustrating an antenna diversity system of a mobile communication terminal for using an antenna of a Bluetooth band as a diversity antenna for a CDMA band.
- FIG. 2 a case in which a Bluetooth antenna operates as a diversity antenna for a CDMA band when the Bluetooth antenna operates as an active antenna will be described.
- the present invention is not limited thereto and may be utilized in various frequency bands. Will be self explanatory.
- an antenna diversity system includes a CDMA antenna 200, a Bluetooth / diversity antenna 202, a CDMA RF circuit unit 204, a switching unit 206, and an active circuit unit ( 208 and the Bluetooth RF circuitry 210.
- the CDMA antenna 200 transmits and receives signals in the CDMA frequency band.
- a microstrip patch antenna may be used as the CDMA antenna, and of course, an external antenna may be used.
- the CDMA RF circuitry 204 is electrically connected to the CDMA antenna 200 and functions to feed the CDMA modulation and demodulation and CDMA RF signals to the CDMA antenna 200.
- the switching unit 206 performs a switching function of electrically connecting the Bluetooth / diversity antenna 202 to the Bluetooth RF circuit unit 208 or the active circuit unit 206 according to a mode.
- the switching unit 206 electrically connects the Bluetooth / diversity antenna with the Bluetooth RF circuitry 210 and the user makes a voice call with the mobile communication terminal. If so, the switching unit 206 electrically connects the Bluetooth / diversity antenna 202 with the active circuit unit 208.
- a controller (not shown) for controlling the connection state of the switching unit 206 may be additionally provided according to a mode.
- the Bluetooth / diversity antenna 202 When the user is in a voice call mode, the Bluetooth / diversity antenna 202 is electrically connected to the active circuit unit 208, and the Bluetooth / diversity antenna 202 operates as a diversity antenna for the CDMA band.
- the active circuit unit 208 may include an amplification module for amplifying a signal with lumped elements configured such that the Bluetooth / diversity antenna is matched in the CDMA band, It can be implemented by transistors.
- the physical length of the Bluetooth / diversity antenna 202 is set according to the Bluetooth frequency band, but when electrically connected to the active circuit unit 208, the output impedance is changed by the operation of the active element of the active circuit unit, resulting in a low resonance frequency.
- the active circuit unit 208 is set such that the Bluetooth / diversity antenna 202 resonates in the CDMA frequency band.
- the Bluetooth / diversity antenna 202 may be a Bluetooth chip antenna.
- the Bluetooth / diversity antenna 202 When the user is in the mode using the Bluetooth service, the Bluetooth / diversity antenna 202 is electrically connected to the Bluetooth RF circuitry 210, the Bluetooth / diversity antenna operates as a general passive antenna.
- one antenna can be used as an antenna for two bands.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Abstract
Description
Claims (7)
- 제1 주파수 대역의 신호를 송수신하기 위한 제1 안테나;제2 주파수 대역의 신호를 송수신하기 위한 제2 안테나; 및능동 소자들로 구현되는 액티브 회로부를 포함하되,제1 모드에서 상기 제2 안테나는 수동 안테나로 동작하고 제2 모드에서 상기 제2 안테나는 상기 액티브 회로부와 전기적으로 연결되어 액티브 안테나로 동작하는 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제1항에 있어서,상기 제2 모드에서 액티브 안테나로 동작할 때 상기 제2 안테나의 공진 대역은 상기 제1 주파수 대역인 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제1항에 있어서,상기 제2 모드에서 상기 제2 안테나는 상기 제1 주파수 대역에 대한 다이버시티 안테나로 동작하는 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제1항에 있어서,상기 제1 주파수 대역은 이동통신 서비스 주파수 대역이고 상기 제2 주파수 대역은 블루투스 대역인 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제1 주파수 대역의 신호를 송수신하기 위한 제1 안테나;제1 주파수 대역의 RF 신호를 처리하는 제1 주파수 RF 회로부;제2 주파수 대역의 신호를 송수신하기 위한 제2 안테나;제2 주파수 대역의 RF 신호를 처리하는 제2 주파수 RF 회로부;능동 소자들로 구현되는 액티브 회로부; 및상기 제2 안테나와 상기 액티브 회로부와의 연결 및 상기 제2 안테나와 상기 제2 주파수 RF 회로부와의 연결을 스위칭하는 스위칭부를 포함하는 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제5항에 있어서,상기 스위칭부에 의해 상기 제2 안테나가 상기 액티브 회로부와 연결될 때 상기 제2 안테나는 액티브 안테나로 동작하며 상기 제2 안테나의 공진 대역은 제1 주파수 대역인 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
- 제6항에 있어서,상기 제1 주파수 대역에서 공진하는 제2 안테나는 제1 안테나에 대한 다이버시티 안테나로 동작하는 것을 특징으로 하는 액티브 안테나를 이용한 안테나 다이버시티 시스템.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801404758A CN102177661A (zh) | 2008-10-21 | 2009-10-19 | 利用有源天线的分集式天线系统 |
US13/125,389 US20120329513A1 (en) | 2008-10-21 | 2009-10-19 | Antenna diversity system using active antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0103336 | 2008-10-21 | ||
KR1020080103336A KR20100044038A (ko) | 2008-10-21 | 2008-10-21 | 액티브 안테나를 이용한 안테나 다이버시티 시스템 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010047505A2 true WO2010047505A2 (ko) | 2010-04-29 |
WO2010047505A3 WO2010047505A3 (ko) | 2010-07-01 |
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ID=42119817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2009/006027 WO2010047505A2 (ko) | 2008-10-21 | 2009-10-19 | 액티브 안테나를 이용한 안테나 다이버시티 시스템 |
Country Status (4)
Country | Link |
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US (1) | US20120329513A1 (ko) |
KR (1) | KR20100044038A (ko) |
CN (1) | CN102177661A (ko) |
WO (1) | WO2010047505A2 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2600537A1 (en) * | 2011-12-02 | 2013-06-05 | Samsung Electronics Co., Ltd | Apparatus and method for providing diversity service antenna in portable terminal |
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CN102412858B (zh) * | 2011-11-04 | 2016-08-24 | 南京中兴软件有限责任公司 | 射频收发器、终端和终端接收信号的方法 |
US9467183B2 (en) | 2014-09-29 | 2016-10-11 | AT&T Intellectaul Property I, L.P. | Method and apparatus for receiving wireless communications |
CN104269660A (zh) * | 2014-10-17 | 2015-01-07 | 成都九华圆通科技发展有限公司 | 具有有源天线和无源天线切换功能的宽带接收天线 |
CN106125112A (zh) * | 2016-06-08 | 2016-11-16 | 广东欧珀移动通信有限公司 | 移动终端的gnss天线系统和移动终端 |
CN106093982B (zh) * | 2016-06-08 | 2018-03-16 | 广东欧珀移动通信有限公司 | 移动终端gnss天线系统、外置gnss天线的选择提示方法及装置 |
CN106093985B (zh) * | 2016-06-08 | 2019-05-14 | Oppo广东移动通信有限公司 | 移动终端的gnss天线系统、移动终端和电子设备 |
CN105954774A (zh) * | 2016-06-08 | 2016-09-21 | 广东欧珀移动通信有限公司 | 移动终端的gnss系统和移动终端 |
CN105929412A (zh) * | 2016-06-08 | 2016-09-07 | 广东欧珀移动通信有限公司 | 移动终端的gnss天线系统、移动终端和电子设备 |
CN105954773A (zh) * | 2016-06-08 | 2016-09-21 | 广东欧珀移动通信有限公司 | 移动终端的全球卫星导航系统gnss系统和移动终端 |
CN106125111B (zh) * | 2016-06-08 | 2018-03-23 | 广东欧珀移动通信有限公司 | 移动终端的全球卫星导航系统gnss系统和移动终端 |
CN106125095B (zh) * | 2016-06-08 | 2018-03-16 | 广东欧珀移动通信有限公司 | 移动终端的全球卫星导航系统gnss系统和移动终端 |
CN106093966A (zh) * | 2016-06-08 | 2016-11-09 | 广东欧珀移动通信有限公司 | 移动终端的gnss系统和移动终端 |
CN106054215A (zh) * | 2016-06-08 | 2016-10-26 | 广东欧珀移动通信有限公司 | 移动终端的全球卫星导航系统gnss系统和移动终端 |
CN107895838A (zh) * | 2017-11-30 | 2018-04-10 | 维沃移动通信有限公司 | 一种天线系统及移动终端 |
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- 2008-10-21 KR KR1020080103336A patent/KR20100044038A/ko not_active Application Discontinuation
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- 2009-10-19 WO PCT/KR2009/006027 patent/WO2010047505A2/ko active Application Filing
- 2009-10-19 CN CN2009801404758A patent/CN102177661A/zh active Pending
- 2009-10-19 US US13/125,389 patent/US20120329513A1/en not_active Abandoned
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US20040053526A1 (en) * | 2002-09-18 | 2004-03-18 | Godfrey Timothy Gordon | Receive diversity antenna system for use with multiple radios |
KR20060083465A (ko) * | 2005-01-17 | 2006-07-21 | 삼성전자주식회사 | 블루투스와 무선랜을 구비하는 이동통신단말기에서안테나를 효과적으로 사용하기 위한 장치 및 방법 |
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EP2600537A1 (en) * | 2011-12-02 | 2013-06-05 | Samsung Electronics Co., Ltd | Apparatus and method for providing diversity service antenna in portable terminal |
Also Published As
Publication number | Publication date |
---|---|
CN102177661A (zh) | 2011-09-07 |
US20120329513A1 (en) | 2012-12-27 |
KR20100044038A (ko) | 2010-04-29 |
WO2010047505A3 (ko) | 2010-07-01 |
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