CN201781064U - Device for improving performance of radio antenna - Google Patents
Device for improving performance of radio antenna Download PDFInfo
- Publication number
- CN201781064U CN201781064U CN2010202713034U CN201020271303U CN201781064U CN 201781064 U CN201781064 U CN 201781064U CN 2010202713034 U CN2010202713034 U CN 2010202713034U CN 201020271303 U CN201020271303 U CN 201020271303U CN 201781064 U CN201781064 U CN 201781064U
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- sound channel
- ground wire
- channel line
- radio antenna
- antenna
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Abstract
The utility model relates to a mobile device for audio output by inserting earphones and discloses a device for improving the performance of a radio antenna. The device comprises an earphone connector, sound channel wires respectively connected with the earphone connector, and an earth wire for receiving FM (Frequency Modulation) antenna signals, wherein a capacitive device is arranged between the earth wire and each of the sound channel wires. The device for improving the performance of the radio antenna can guide FM signals on the left sound channel and the right sound channel and a microphone wire to the FM antenna signals by additionally arranging the capacitive device, thereby improving the signal strength and the receiving sensitivity of an FM antenna and effectively improving the performance of the FM antenna, which are proved in various products. In addition, the utility model has simple structure and low manufacture cost and is easy to realize.
Description
Technical field
The utility model relates to can insert the mobile device of earphone as audio frequency output, in particular a kind of device that improves the radio antenna performance.
Background technology
Present mobile phone, increasing integrated FM radio function in the mobile devices such as MP3, because external earphone cord is long, the relative built-in earphone of performance is relatively good, and, simplicity of design practicality (ground wire of FM antenna duplexer earphone), and external earphone has the function of listening to music concurrently, is the indispensable accessory of mobile phone.Yet, because the earth connection of FM antenna duplexer earphone, when listening to the FM program, the user receives the FM signal by ground wire again, and this ground wire becomes the holding wire of audio frequency and FM antenna duplexer, simultaneously, because the impedance of the loudspeaker of earphone is very little (general 32 ohm, perhaps 16 ohm), the left and right acoustic channels of earphone and Mike's line all become the part of FM antenna, so the energy of the useful signal that a part of FM antenna receives can lose by left and right acoustic channels and Mike's line loss of earphone, causes the sensitivity of FM antenna on the low side, poor signal, and then have influence on the effect that the user listens to the FM program
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of device that improves the radio antenna performance, it has improved the signal strength signal intensity and the receiving sensitivity of broadcast receiver FM antenna, effectively improved the FM antenna performance, and simple in structure, realize easily.
The technical scheme that the utility model technical solution problem is adopted is as follows:
A kind of device that can improve the radio antenna performance comprises headset connector, and sound channel line that is connected with described headset connector respectively and the ground wire that can be used as the access of FM aerial signal, wherein, is provided with capacitive device between described ground wire and described sound channel line.
The described device that can improve the radio antenna performance, wherein, described sound channel line comprises the L channel line, and is provided with first capacitive device between described L channel line and described ground wire.
The described device that can improve the radio antenna performance, wherein, described sound channel line comprises the R channel line, and is provided with second capacitive device between described R channel line and described ground wire.
The described device that can improve the radio antenna performance, wherein, it also comprises the MIC line that is connected with headset connector, and is provided with the 3rd capacitive device between described MIC line and described ground wire.
The described device that can improve the radio antenna performance, wherein, institute's capacitive device is an electric capacity, and its choosing value scope is 500pf～2nf.
The device of raising radio antenna performance provided by the utility model, by increasing capacitive device the FM signal on earphone left and right acoustic channels and the Mike's line is guided on the FM aerial signal, the signal strength signal intensity and the receiving sensitivity of FM antenna have been improved, effectively improved the FM antenna performance, and in many products, be verified, and simple in structure, cost of manufacture is low, realizes easily.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram that can improve the radio antenna performance of the utility model embodiment.
Embodiment
The device of raising radio antenna performance provided by the utility model, clearer, clear and definite for making the purpose of this utility model, technical scheme and advantage, below the utility model is further described with reference to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A kind of device that can improve the radio antenna performance of the utility model embodiment 1, be mainly used in the earphone interface circuit with the handheld mobile device of function of radio receiver, as shown in Figure 1, it comprises headset connector 100, and sound channel line that is connected with described headset connector 100 respectively and the ground wire 111 that can be used as the access of FM aerial signal.Headset connector described in the present embodiment 100 is for being arranged on the earphone socket on the mobile device, and its ground wire 111 connects with reference to ground by a jamproof buffer circuit.
When inserting earphone in the prior art and begin radio function, mainly insert the FM signal by the ground wire that connects earphone from ground wire, reach radio function, and the not strong problem of its radio receiver signal.During invention is implemented, be provided with capacitive device 120 between described ground wire 111 and the described sound channel line and strengthen function of radio receiver by being arranged on.As shown in Figure 1, described sound channel line comprises L channel line 113 and R channel line 112.And between described L channel line 113 and described ground wire 111, be provided with the first capacitive device C2.Between described R channel line 112 and described ground wire 111, be provided with the second capacitive device C1.
Some mobile device also has headset (MIC) line to connect microphone, and among the utility model embodiment, it also comprises the MIC line 114 that is connected with headset connector 100, and is provided with the 3rd capacitive device C3 between described MIC line 114 and described ground wire 111.
Among the utility model embodiment, the described first capacitive device C2, the choosing value of the second capacitive device C1 and the 3rd capacitive device C3 (is 500pf～2nf) about 1NF, because this is that the resonance frequency of electric capacity is greatly about 100MHz, the frequency range that drops on receipts machine sound machine (FM) is (in the 76M～108MHz), and the tonal range that can hear away from people's ear (300Hz～3400Hz), so, the utility model can effectively be dredged the signal of FM frequency range on the ground wire 111 (being FM aerial signal line) that can be used as the access of FM aerial signal from earphone left and right acoustic channels line and Mike's line, can not influence audio signal again, thereby the signal strength signal intensity and the receiving sensitivity of FM antenna have effectively been strengthened, effectively improved the FM antenna performance, and in many products, be verified, simultaneously, it is simple in structure, and cost of manufacture is low.
The device that can improve the radio antenna performance that second embodiment of the present utility model provides, identical with the embodiment principle of front, what what is called was different is, front first embodiment is arranged in the earphone interface in the mobile device, and second embodiment is provided with capacitive device between sound channel line in existing earphone and the ground wire can reach above-mentioned effect equally.
The device that can improve the radio antenna performance is provided in second example, be earphone, comprise headset plug, and the earphone ground wire that can be used as the FM antenna and the earphone sound channel line that are connected with described headset plug, and between described earphone ground wire and described earphone sound channel line, be provided with capacitive device.Certainly, when earphone band microphone lines is arranged, can between described microphone lines and described ground wire, above-mentioned capacitive device be set equally.Its principle is identical with the principle of first embodiment, be not repeated in this description a bit.
Based on the foregoing description, the utility model embodiment also provides a kind of method that improves the radio antenna performance, as shown in Figure 1, described method comprises step: between ground wire 111 and sound channel line capacitive device is set, by described capacitive device the FM signal on the sound channel line line is guided on the ground wire that can be used as the access of FM aerial signal.And the 3rd capacitive device C3 spare is set between MIC line 114 and described ground wire 111.
The method of described raising radio antenna performance, described sound channel line comprises L channel line 113 and R channel line 112, it is described to be provided with capacitive device and specifically to comprise step between ground wire and sound channel line:
The first capacitive device C2 is set between L channel line 113 and described ground wire 111;
Between R channel line and 112 described ground wires 111, the second capacitive device C3 is set.
The method of described raising radio antenna performance, wherein, institute's capacitive device is an electric capacity, and its choosing value scope is 500pf～2nf.
In sum, the device of raising radio antenna performance provided by the utility model, by increasing capacitive device the FM signal on earphone left and right acoustic channels and the Mike's line is guided on the FM aerial signal, the signal strength signal intensity and the receiving sensitivity of FM antenna have been improved, effectively improved the FM antenna performance, and in many products, be verified, and simple in structure, cost of manufacture is low, realizes easily.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (5)
1. device that can improve the radio antenna performance, comprise headset connector, and sound channel line that is connected with described headset connector respectively and the ground wire that can be used as the access of FM aerial signal, it is characterized in that, between described ground wire and described sound channel line, be provided with capacitive device.
2. according to the described device that can improve the radio antenna performance of claim 1, it is characterized in that described sound channel line comprises the L channel line, and between described L channel line and described ground wire, be provided with first capacitive device.
3. according to the described device that can improve the radio antenna performance of claim 1, it is characterized in that described sound channel line comprises the R channel line, and between described R channel line and described ground wire, be provided with second capacitive device.
4. according to the described device that can improve the radio antenna performance of claim 1, it is characterized in that it also comprises the MIC line that is connected with headset connector, and between described MIC line and described ground wire, be provided with the 3rd capacitive device.
5. according to the described device that can improve the radio antenna performance of claim 1, it is characterized in that institute's capacitive device is an electric capacity, and its choosing value scope is 500pf～2nf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202713034U CN201781064U (en) | 2010-07-23 | 2010-07-23 | Device for improving performance of radio antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202713034U CN201781064U (en) | 2010-07-23 | 2010-07-23 | Device for improving performance of radio antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781064U true CN201781064U (en) | 2011-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202713034U Expired - Fee Related CN201781064U (en) | 2010-07-23 | 2010-07-23 | Device for improving performance of radio antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781064U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517419A (en) * | 2016-06-15 | 2017-12-26 | 深圳富泰宏精密工业有限公司 | Have the electronic installation and its FM antenna switching methods of FM function |
-
2010
- 2010-07-23 CN CN2010202713034U patent/CN201781064U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517419A (en) * | 2016-06-15 | 2017-12-26 | 深圳富泰宏精密工业有限公司 | Have the electronic installation and its FM antenna switching methods of FM function |
| CN107517419B (en) * | 2016-06-15 | 2019-11-01 | 深圳富泰宏精密工业有限公司 | Have the electronic device and its FM antenna switching method of FM function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20130723 |