CN202352836U - Double-frequency common antenna - Google Patents
Double-frequency common antenna Download PDFInfo
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- CN202352836U CN202352836U CN2011204171773U CN201120417177U CN202352836U CN 202352836 U CN202352836 U CN 202352836U CN 2011204171773 U CN2011204171773 U CN 2011204171773U CN 201120417177 U CN201120417177 U CN 201120417177U CN 202352836 U CN202352836 U CN 202352836U
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- common antenna
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Abstract
The utility model discloses a double-frequency common antenna. The double-frequency common antenna comprises a common antenna, a first filter module and a second filter module, wherein the input end of the first filter module and the input end of the second filter module are connected on the output end of the common antenna; the common antenna receives wireless communication signals of a first frequency band and a second frequency band; the first filter module extracts signals for the first frequency band service from the common antenna; and the second filter module extracts signals for the second frequency band service from the common antenna. The double-frequency common antenna achieves the functions of two or a plurality of frequency bands with the area of only one antenna, so that effective integration and double-frequency band antenna sharing for a plurality of frequency band antennas such as a RFID (Radio Frequency Identification Devices) antenna, a FM (Frequency Modulation) antenna, and the like, are achieved, thus improving the compatibility of a mobile terminal, strengthening the functions of the terminal without increasing the size of the terminal, reducing the design cost, and saving the space of a mobile phone.
Description
Technical field
The utility model relates to the wireless mobile communications field of antenna, relates in particular to the Bifrequency shared antenna of a kind of radio frequency identification and frequency modulation(FM) common antenna.
Background technology
REID (Radio Frequency Identification; Hereinafter to be referred as RFID); As a kind of contactless automatic identification technology, its frequency range commonly used now is high frequency 13.56 megahertzes (MHz), can discern high-speed moving object and can discern a plurality of labels simultaneously; Has communication distance far away, by application more and more widely.And frequency modulation (Frequency Modulation; Hereinafter to be referred as FM) used frequency range is 76-108 MHz; As the standard configuration of current hand-held mobile terminal, the multiple action at aspects such as traffic, stock, amusements of FM becomes people requisite " friend " gradually.In RFID portable terminal of today, increase the FM function, can strengthen the practicality at its terminal; But increase the FM function, must add the FM antenna, and its terminal does not all have the earphone function, can not use the earphone of external routine to make the antenna mode, can only use built-in aerial, increases antenna separately will cause terminal size to become big, designs restricted.
The utility model content
The utility model technical problem to be solved is; A kind of Bifrequency shared antenna is provided; When solving traditional function that increase by second frequency band is had in the portable terminal of supporting first frequency band; Must add the required antenna of second frequency band, will cause terminal size to become big, design restricted problem and increase antenna separately.
In order to address the above problem; The utility model provides a kind of Bifrequency shared antenna; It is characterized in that; Comprise common antenna, first filter module, second filter module, the input of the input of said first filter module and second filter module is connected the output of said common antenna, and said common antenna receives the wireless communication signals of first frequency band and second frequency band; Said first filter module extracts the signal that is used for said first frequency band service from said common antenna, said second filter module extracts the signal that is used for said second frequency band service from said common antenna.
Preferably, the length of said common antenna is more than or equal to said first frequency band and the lower desired antenna length of a frequency of the said second frequency band midband.
Said first filter module, second filter module comprise a filter circuit separately, and said filter circuit comprises at least one in low-pass filter circuit, bandwidth-limited circuit, rejector circuit, the high-pass filtering circuit.
Preferably; The utility model Bifrequency shared antenna further comprises one the 3rd filter module; Said common antenna further links to each other with said the 3rd filter module; Prevent that ground interference signal is back to said common antenna, said the 3rd filter module comprises a filter circuit, and said filter circuit comprises at least one in low-pass filter circuit, bandwidth-limited circuit, rejector circuit, the high-pass filtering circuit.
Preferably; Said first filter module and second filter module further comprise an impedance line separately; The input of said impedance line is connected to the output of said common antenna, and the output of said impedance line is connected to the input of said first filter module and second filter module.
Preferably, said the 3rd filter module further comprises an impedance line, and the input of said impedance line is connected to the output of said common antenna, and the output of said impedance line is connected to the input of said the 3rd filter module.
Preferably, said impedance line adopts 25 ohm to 77 ohm impedance line.
Preferably, said first filter module and second filter module comprise further that separately one is connected the matching network of filter circuit output separately, and said matching network is used for reducing the loss of signal in transmission course.
Preferably, said first filter module is a RFID frequency band extraction module, and second filter module is a FM frequency band extraction module; Or first filter module be FM frequency band extraction module, second filter module is a RFID frequency band extraction module.
The advantage of the utility model is; Compare with conventional art, the utility model only needing to have realized the area of an antenna can realize two kinds even function that a plurality of frequency band possessed, has realized the effective integration of multiple band antennas such as RFID antenna and FM antenna and dual-band antenna shared; Improved the compatibility of portable terminal; Do not increase the volume at terminal when strengthening the function at terminal, reduced design cost, and practice thrift the mobile phone space.
Description of drawings
Fig. 1 is the structural representation of the utility model Bifrequency shared antenna embodiment;
Fig. 2 is the circuit theory sketch map of an embodiment of the utility model Bifrequency shared antenna.
Embodiment
The embodiment of the Bifrequency shared antenna that the utility model is provided below in conjunction with accompanying drawing elaborates.
Fig. 1 is the structural representation of the said Bifrequency shared antenna embodiment of the utility model, comprises common antenna M11, the first filter module M12, the second filter module M13 and the 3rd filter module M14.
The output of said common antenna M11 is connected the input of the said first filter module M12 and the input of the second filter module M13; Said common antenna M11 length is more than or equal to first frequency band and the lower desired antenna length of a frequency of the second frequency band midband; Said common antenna M11 is used to receive the wireless communication signals of first frequency band and second frequency band; The said first filter module M12 extracts the signal that is used for said first frequency band service from said common antenna M11; The said second filter module M13 extracts the signal that is used for said second frequency band service from said common antenna M11; The 3rd filter module M14 links to each other with said common antenna M11, is used to prevent that ground interference signal is back to said common antenna M11.
The said first filter module M12, the second filter module M13, the 3rd filter module M14 comprise a filter circuit separately, and said filter circuit comprises at least one in low-pass filter circuit, bandwidth-limited circuit, rejector circuit, the high-pass filtering circuit.
The design of common antenna M11 is: the length and the wavelength of antenna are proportional, and high, the corresponding more wavelength length shorter, antenna of frequency is also short more.Antenna length can get the low frequency of frequency band wavelength 1/4, obviously satisfy the desired antenna length of the low frequency of frequency band and must satisfy the desired antenna length of the high frequency of frequency band.
Fig. 2 is the circuit theory sketch map of an embodiment of the utility model Bifrequency shared antenna, comprises common antenna M21, RFID frequency band extraction module M22, FM frequency band extraction module M23, interference signal filtration module M24.
The output of said common antenna M21 is connected the input of said RFID frequency band extraction module M22 and the input of FM frequency band extraction module M23; Said common antenna M21 length is more than or equal to RFID frequency band and the lower desired antenna length of RFID frequency band of FM frequency band midband; Said common antenna M21 is used to receive the wireless communication signals of RFID frequency band and FM frequency band; Said RFID frequency band extraction module M22 extracts the signal that is used for the service of RFID frequency band from said common antenna M21; Said FM frequency band extraction module M23 extracts the signal that is used for the service of FM frequency band from said common antenna M21; Interference signal filtration module M24 links to each other with said common antenna M21, is used to prevent that ground interference signal is back to said common antenna M21.
The matching network that band stop filter that impedance line M221 that said RFID frequency band extraction module M22 comprises and the resistance R that connects 11 and polarity free capacitor C11 form and the capacitor C 1 that connects and inductance L 1 are formed and inductance L 2, inductance L 3, capacitor C 2 are formed; Said band stop filter links to each other with the output of said common antenna M21 through said impedance line M221, is used to stop that the FM signal passes through; Said matching network links to each other with said band stop filter, is used for guaranteeing that signal lacks loss in transmission course as far as possible, thus the elevator system performance.
Band pass filter and inductance L 4 that impedance line M231 that said FM frequency band extraction module M23 comprises and the resistance R that connects 12 and polarity free capacitor C12 form and the inductance L 5 that connects and capacitor C 3 are formed; Said inductance L 4 links to each other with the output of said common antenna M21 through said impedance line M231, is used for the filtering high-frequency signal, promotes the FM performance; Said band pass filter links to each other with said inductance L 4, is used for only allowing the FM signal to pass through.
The impedance line M241 that interference signal filtration module M24 comprises and the resistance R that connects 13 and polarity free capacitor C13 form and and the filter formed of the capacitor C 4 that connects and inductance L 6; Said filter links to each other with said common antenna M21 through said impedance line M241, is used to prevent that ground interference signal is back to common antenna M21, has influence on common antenna M21 receptivity, and said interference signal is the broadband interference signal.
Said impedance line M221, M231, M241 adopt 25 ohm to 77 ohm impedance line.For air-dielectric coaxial cable, minimum for making loss, the optimum ratio that requires outer conductor internal diameter and inner conductor outer diameter is 3.6, is 77 ohm corresponding to impedance; And the maximum peak power capacity that allows before the dielectric breakdown appears, and during maximum power capabilities, the outer conductor internal diameter should be 1.65 with the ratio of inner conductor outer diameter, and corresponding impedance is 30 ohm.The geometric average approximation of 77 ohm and 30 ohm is 50 ohm, also promptly 50 ohm promptly be compromise value between air coaxial cable minimal losses and the maximum power capabilities.So, can adopt 50 ohm impedance line, guarantee the high efficiency transmission of signal.
The design of said common antenna M21 is: the used frequency range of RFID is 13.56 MHz, and wavelength is 22.1 meters, and antenna length is 1/4 of wavelength at least, also is that the required antenna length of RFID is at least 5.25 meters; The used frequency range of FM is 76-108 MHz, gets median 100MHz, and wavelength is 3 meters, and required antenna length is at least 0.75 meter; The desired antenna length of RFID is greater than the desired antenna length of FM.The M21 of common antenna described in the present embodiment can adopt the RFID antenna.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (9)
1. Bifrequency shared antenna; It is characterized in that; Comprise common antenna, first filter module, second filter module; The input of the input of said first filter module and second filter module is connected the output of said common antenna; Said common antenna receives the wireless communication signals of first frequency band and second frequency band, and said first filter module extracts the signal that is used for said first frequency band service from said common antenna, and said second filter module extracts the signal that is used for said second frequency band service from said common antenna.
2. Bifrequency shared antenna according to claim 1 is characterized in that: the length of said common antenna is more than or equal to said first frequency band and the lower desired antenna length of a frequency of the said second frequency band midband.
3. Bifrequency shared antenna according to claim 1; It is characterized in that: said first filter module, second filter module comprise a filter circuit separately, and said filter circuit comprises at least one in low-pass filter circuit, bandwidth-limited circuit, rejector circuit, the high-pass filtering circuit.
4. Bifrequency shared antenna according to claim 1; It is characterized in that; Further comprise one the 3rd filter module, said common antenna further links to each other with said the 3rd filter module, prevents that ground interference signal is back to said common antenna; Said the 3rd filter module comprises a filter circuit, and said filter circuit comprises at least one in low-pass filter circuit, bandwidth-limited circuit, rejector circuit, the high-pass filtering circuit.
5. Bifrequency shared antenna according to claim 1; It is characterized in that: said first filter module and said second filter module further comprise an impedance line separately; The input of said impedance line is connected to the output of said common antenna, and the output of said impedance line is connected to the input of said first filter module and said second filter module.
6. Bifrequency shared antenna according to claim 4; It is characterized in that: said the 3rd filter module further comprises an impedance line; The input of said impedance line is connected to the output of said common antenna, and the output of said impedance line is connected to the input of said the 3rd filter module.
7. according to claim 5 or 6 described Bifrequency shared antennas, it is characterized in that: said impedance line adopts 25 ohm to 77 ohm impedance line.
8. according to claim 1 or 3 described Bifrequency shared antennas; It is characterized in that: said first filter module and said second filter module comprise further that separately one is connected the matching network of filter circuit output separately, and said matching network is used for reducing the loss of signal in transmission course.
9. Bifrequency shared antenna according to claim 1 is characterized in that: said first filter module is a RFID frequency band extraction module, and said second filter module is a FM frequency band extraction module; Or said first filter module is FM frequency band extraction module, and said second filter module is a RFID frequency band extraction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204171773U CN202352836U (en) | 2011-10-28 | 2011-10-28 | Double-frequency common antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204171773U CN202352836U (en) | 2011-10-28 | 2011-10-28 | Double-frequency common antenna |
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| CN202352836U true CN202352836U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204171773U Expired - Lifetime CN202352836U (en) | 2011-10-28 | 2011-10-28 | Double-frequency common antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833689A (en) * | 2012-08-21 | 2012-12-19 | 中兴通讯股份有限公司 | Mobile terminal and receiving-transmitting method of radio frequency signal |
| CN104079311A (en) * | 2013-03-28 | 2014-10-01 | 詹诗怡 | Communication system and communication control method |
| CN105633551A (en) * | 2014-11-21 | 2016-06-01 | 三星电子株式会社 | Antenna and electronic device including the same |
| CN109273854A (en) * | 2018-09-30 | 2019-01-25 | 联想(北京)有限公司 | Electronic equipment |
| CN109786912A (en) * | 2017-11-07 | 2019-05-21 | 深圳市南方硅谷微电子有限公司 | Dual-frequency system and its relevant frequency divider |
| CN110768683A (en) * | 2019-11-20 | 2020-02-07 | 深圳市钮为通信技术有限公司 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
-
2011
- 2011-10-28 CN CN2011204171773U patent/CN202352836U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833689A (en) * | 2012-08-21 | 2012-12-19 | 中兴通讯股份有限公司 | Mobile terminal and receiving-transmitting method of radio frequency signal |
| WO2013178159A1 (en) * | 2012-08-21 | 2013-12-05 | 中兴通讯股份有限公司 | Mobile terminal and method for receiving and transmitting radio frequency signal |
| US9374181B2 (en) | 2012-08-21 | 2016-06-21 | Zte Corporation | Mobile terminal and method for receiving and transmitting radio frequency signal |
| CN102833689B (en) * | 2012-08-21 | 2018-03-20 | 中兴通讯股份有限公司 | A kind of receiving/transmission method of mobile terminal and radiofrequency signal |
| CN104079311A (en) * | 2013-03-28 | 2014-10-01 | 詹诗怡 | Communication system and communication control method |
| CN105633551A (en) * | 2014-11-21 | 2016-06-01 | 三星电子株式会社 | Antenna and electronic device including the same |
| CN105633551B (en) * | 2014-11-21 | 2019-05-03 | 三星电子株式会社 | Antenna and electronic equipment including antenna |
| US10468750B2 (en) | 2014-11-21 | 2019-11-05 | Samsung Electronics Co., Ltd | Antenna and electronic device including the same |
| CN109786912A (en) * | 2017-11-07 | 2019-05-21 | 深圳市南方硅谷微电子有限公司 | Dual-frequency system and its relevant frequency divider |
| CN109273854A (en) * | 2018-09-30 | 2019-01-25 | 联想(北京)有限公司 | Electronic equipment |
| CN110768683A (en) * | 2019-11-20 | 2020-02-07 | 深圳市钮为通信技术有限公司 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI REMOWIRELESS COMMUNICATION TECHNOLOGY CO. Free format text: FORMER OWNER: XIMUTONG INFORMATION TECHNOLOGY CO., LTD., SHANGHAI Effective date: 20150506 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200335 CHANGNING, SHANGHAI TO: 201103 MINHANG, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150506 Address after: 201103, 1111, building 11, Hong Yi Building, 2158 Wanyuan Road, Shanghai, Minhang District Patentee after: Shanghai RemoWireless Communication Technology Co., Ltd. Address before: 200335 Shanghai city Changning District Admiralty Road No. 633 building A Patentee before: Shanghai SIMCom Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |