CN202308277U - Built-in digital television receiving antenna for mobile phone - Google Patents
Built-in digital television receiving antenna for mobile phone Download PDFInfo
- Publication number
- CN202308277U CN202308277U CN2011204120593U CN201120412059U CN202308277U CN 202308277 U CN202308277 U CN 202308277U CN 2011204120593 U CN2011204120593 U CN 2011204120593U CN 201120412059 U CN201120412059 U CN 201120412059U CN 202308277 U CN202308277 U CN 202308277U
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- China
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- digital television
- broadband matching
- mobile phone
- matching network
- built
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Abstract
The utility model discloses a built-in digital television receiving antenna for a mobile phone, which comprises a built-in antenna, a radio frequency transformer, a digital television receiving chip and multiple broadband matching networks of different frequency bands, wherein the two ends of the radio frequency transformer are respectively coupled with the built-in antenna and the broadband matching networks; and a low noise amplifier is connected among the broadband matching networks and the digital television receiving chip. The radio frequency transformer is adopted for impedance transformation, so that the length of the digital television receiving antenna for the mobile phone is reduced, the antenna can be built in the mobile phone, the design and installation of the digital television receiving antenna are greatly facilitated, and meanwhile, the low noise amplifier is adopted for improving the antenna gain, and the stability of the digital television signal received in the mobile state is ensured.
Description
Technical field
The utility model relates to field of antenna, particularly relates to a kind of embedded in mobile phone digital television receiver antenna.
Background technology
Since DTV starts broadcasting; Various television reception products are also constantly released in response to the market demand; Such as the various products that have dynamic display also all will import television receiving function; For example: all begin to be provided with relevant receiving system in the various portable products such as notebook computer, PDA, mobile phone, wrist-watch, camera, head mounted display, with the needs that are convenient for people to.Thereby the technology of this mobile TV reception antenna, become after MP3 and use the most widely.The ability that receives television signal often determines the win or lose of product integration, and television receiving antenna also just becomes to be this key technologies for application, and portable antenna has just become the core key element.
The mobile phone that has TV functions at present is more and more universal, and the reception antenna of these mobile TVs is the telescopic antenna of an extension type normally.And these telescopic antenna normal lengths are longer, and it is inner not too to be fit to be placed on undersized mobile phone.If but blindly antenna length is shortened, its radiation impedance will diminish, and increase the weight of with the mismatch degree of system, cause most of energy to be reflected, and be unfavorable for the demodulation of television reception chip to signal.Therefore, how under the prerequisite that guarantees antenna performance, the television receiving antenna minimized in size to be become an outstanding problem.The design has just proposed a kind of scheme with the miniaturization of mobile TV reception antenna.
The utility model content
The technical problem that the utility model mainly solves provides the embedded in mobile phone digital television receiver antenna that a kind of volume and weight is less, receive signal stabilization.
For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of embedded in mobile phone digital television receiver antenna is provided; The broadband matching network that comprises built-in aerial, radio freqnency transformer, DTV receiving chip and some different frequency ranges; Said radio freqnency transformer two ends couple said built-in aerial and broadband matching network respectively, are connected with low noise amplifier between said broadband matching network and the DTV receiving chip.
In preferred embodiment of the utility model, said built-in aerial is the aerial radiation sheet.
In preferred embodiment of the utility model, said built-in aerial length less than receiving 1/4 of signal wavelength.
In preferred embodiment of the utility model, said low noise amplifier working band is 480-860MHz, and operating voltage is 3.8V, average gain 10dB, noise factor 1.86.
In preferred embodiment of the utility model, broadband matching network is three.
In preferred embodiment of the utility model, be connected through RF switch between said radio freqnency transformer and the broadband matching network, said RF switch connects the input of said each broadband matching network respectively.
In preferred embodiment of the utility model; The working frequency range of first broadband matching network in the said broadband matching network is 55-80MHz; The working frequency range of second broadband matching network is 160-210MHz, and the working frequency range of the 3rd broadband matching network is 460-850MHz.
The beneficial effect of the utility model is: the utility model is through adopting the radio freqnency transformer transforming impedance with the length that reduced the hand-set digit television receiving antenna and make it to be built in the mobile phone; Greatly facilitate the design and installation of digital television receiver antenna; Pass through low noise amplifier simultaneously to improve antenna gain, the stability of the digital television signal that receives in guaranteeing to move.
Description of drawings
Fig. 1 is the structural representation of the utility model embedded in mobile phone digital television receiver antenna one preferred embodiment;
The mark of each parts is following in the accompanying drawing: 1, built-in aerial, 2, radio freqnency transformer, 3, the DTV receiving chip, 4, broadband matching network, 5, low noise amplifier, 6, RF switch.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the utility model is set forth in detail, thereby the protection range of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.
See also Fig. 1, the utility model embodiment comprises:
A kind of embedded in mobile phone digital television receiver antenna; The broadband matching network 4 that comprises built-in aerial 1, radio freqnency transformer 2, DTV receiving chip 3 and some different frequency ranges; Said radio freqnency transformer 2 two ends couple said built-in aerial 1 and broadband matching network 4 respectively, are connected with low noise amplifier 5 between said broadband matching network 4 and the DTV receiving chip 2.
Said built-in aerial 1 is the aerial radiation sheet, and built-in aerial 1 is high Low ESR built-in aerial of phase step type or gradual change type impedance, the 3770hm of the impedance of built-in aerial 1 from the 500hm of feed to free space, and the length of built-in aerial 1 is less than receiving 1/4 of signal wavelength.
Said low noise amplifier 5 is made up of metal-oxide-semiconductor, first electric capacity, second electric capacity, the 3rd electric capacity, first resistance, second resistance.First electric capacity, second electric capacity are as capacitance, and the 3rd electric capacity is as shunt capacitance.First resistance is as collector resistance, and second resistance is as biasing resistor, and operating voltage is 3.8V.In the present embodiment, low noise amplifier 5 power consumptions are little, and operating current is 3mA only, and about gain 10dB, noise factor is less than 2, the frequency band range 480-860MHz of work.
TV signal gets into three corresponding broadband matching networks 4 after through three switches, and these broadband matching networks 4 are all with multistage inductance, electric capacity composition.Because inductance, the capacitance of each broadband matching network 4 are different, each broadband matching network 4 corresponding different working frequency range.Through these multistage inductance, electric capacity match circuit, can realize the Broadband Matching of RF switch 6 and TV receiving system well.
During use, TV signal gets into radio freqnency transformer 2 after being received by built-in aerial 1; Through utilizing the impedance transformation characteristic of radio freqnency transformer 2, the little resistance radiation impedance of antenna is amplified to the relatively large impedance of resistance, help the coupling of back and TV receiving system; And then; TV signal gets into three corresponding broadband matching networks 4 after through three switches, through these multistage inductance, electric capacity match circuit, can realize the Broadband Matching of RF switch 2 and TV receiving system well; Pass through low noise amplifier 5 then; TV signal has obtained amplification, has significantly improved the signal strength signal intensity of TV signal, and the TV signal after the amplification is sent into DTV receiving chip 3 at last and separated the mediation demonstration.
The utility model is through adopting radio freqnency transformer 2 transforming impedances with the length that reduced the hand-set digit television receiving antenna and make it to be built in the mobile phone; Greatly facilitate the design and installation of digital television receiver antenna; Pass through low noise amplifier 5 simultaneously to improve antenna gain, the stability of the digital television signal that receives in guaranteeing to move.
The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (7)
1. embedded in mobile phone digital television receiver antenna; It is characterized in that: the broadband matching network (4) that comprises built-in aerial (1), radio freqnency transformer (2), DTV receiving chip (3) and some different frequency ranges; Said radio freqnency transformer (2) two ends couple said built-in aerial (1) and broadband matching network (4) respectively, are connected with low noise amplifier (5) between said broadband matching network (4) and the DTV receiving chip (3).
2. embedded in mobile phone digital television receiver antenna according to claim 1 is characterized in that: said built-in aerial (1) is the aerial radiation sheet.
3. embedded in mobile phone digital television receiver antenna according to claim 1 is characterized in that: said built-in aerial (1) length less than receiving 1/4 of signal wavelength.
4. embedded in mobile phone digital television receiver antenna according to claim 1 is characterized in that: said low noise amplifier (5) working band is 480-860MHz, and operating voltage is 3.8V, average gain 10dB, noise factor 1.86.
5. embedded in mobile phone digital television receiver antenna according to claim 1 is characterized in that: broadband matching network (4) is three.
6. embedded in mobile phone digital television receiver antenna according to claim 1; It is characterized in that: be connected through RF switch (6) between said radio freqnency transformer (2) and the broadband matching network (4), said RF switch (6) connects the input of said each broadband matching network (4) respectively.
7. embedded in mobile phone digital television receiver antenna according to claim 1; It is characterized in that: the working frequency range of first broadband matching network in the said broadband matching network (4) is 55-80MHz; The working frequency range of second broadband matching network is 160-210MHz, and the working frequency range of the 3rd broadband matching network is 460-850MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204120593U CN202308277U (en) | 2011-10-26 | 2011-10-26 | Built-in digital television receiving antenna for mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204120593U CN202308277U (en) | 2011-10-26 | 2011-10-26 | Built-in digital television receiving antenna for mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202308277U true CN202308277U (en) | 2012-07-04 |
Family
ID=46377103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204120593U Expired - Fee Related CN202308277U (en) | 2011-10-26 | 2011-10-26 | Built-in digital television receiving antenna for mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202308277U (en) |
-
2011
- 2011-10-26 CN CN2011204120593U patent/CN202308277U/en not_active Expired - Fee Related
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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: CHANGZHOU 0519 ELECTRONICS CO., LTD. Free format text: FORMER OWNER: CHANGZHOU YABANG ANTENNA CO., LTD. Effective date: 20120823 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215500 CHANGZHOU, JIANGSU PROVINCE TO: 213145 CHANGZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120823 Address after: 213145, No. 19, Dongfang South Road, Li Changting Industrial Park, Changzhou, Jiangsu Patentee after: Changzhou 0519 Electronics Co., Ltd. Address before: 215500, No. 38, Zhang Jia Road, Xilin bell tower, bell tower, Changzhou, Jiangsu Patentee before: Changzhou Yabang Antenna Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20131026 |