CN203232960U - Active antenna applied to radio - Google Patents
Active antenna applied to radio Download PDFInfo
- Publication number
- CN203232960U CN203232960U CN 201320198194 CN201320198194U CN203232960U CN 203232960 U CN203232960 U CN 203232960U CN 201320198194 CN201320198194 CN 201320198194 CN 201320198194 U CN201320198194 U CN 201320198194U CN 203232960 U CN203232960 U CN 203232960U
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- resistance
- electric capacity
- transistor
- capacitor
- resistor
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
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Abstract
The utility model discloses an active antenna applied to a radio. The active antenna comprises a transmitting antenna, an input interface, a power supply, a first transistor, a second transistor, a third transistor, a fourth transistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor. According to the utility model, the reception range and the sensitivity of the antenna are improved; the gain of 14 to 20dB is provided in short wave and amateur radio frequencies of 1 to 30MHZ; relative to an short antenna whose reception frequency is 1/4 wavelength, the relative impedance is small and high at present; the gain is 20dB from 1 to 18MHz, and gradually decreases from 30MHz to 14 decibels; and the active antenna is suitable for short wave receiving.
Description
Technical field
The utility model relates to a kind of antenna, relates in particular to a kind of for wireless active antenna.
Background technology
The wireless FM antenna of existing FM generally all adopts the design of telescopic antenna, active antenna is based on transistor and some other common assembly, receive signal in order to improve short frequency, usually need to prolong the length of reception antenna, the antenna that uses is longer, the signal that receives is more strong, because telescopic antenna will be placed on the outside of FM body, add that present people are harsher to the requirement of various electronic product outward appearances, traditional telescopic antenna can badly influence the attractive in appearance of antenna body, now also there are a lot of FM antennas to be built in FM body the inside, quality of signals does not have too big difference under the equisignal environment in the open, but signal quality non-constant all under indoor weak signal environment, the existing FM antenna while, because the product difference, antenna environment is all different, each product needs to go specially to regulate antenna and terminal coupling, trouble very.
The utility model content
The purpose of this utility model provides a kind of simple in structure in order to address the above problem, the active antenna that receiving sensitivity is high with regard to being.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises transmitting antenna, input interface, power supply, the first transistor, transistor seconds, the 3rd transistor, the 4th transistor, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance and the 11 resistance, the cathode output end of described power supply respectively with first end of described second resistance, first end of described the 4th resistance, the collector electrode of described transistor seconds, first end of described the 7th resistance, first end of described the tenth resistance, first end of described the 7th electric capacity, first end of described the 8th electric capacity connects, second end of described the 8th electric capacity respectively with the cathode output end of described power supply, second end of described the 7th electric capacity is connected with first end of described the 5th electric capacity, second end of described the tenth resistance is connected with second end of the described the 4th transistorized collector electrode and described the 5th electric capacity respectively, the base stage of described the first transistor is connected with first end of described first electric capacity and first end of described first resistance, second end of described first electric capacity is connected with described transmitting antenna, be connected with the 4th electric capacity between second end of the collector electrode of described the first transistor and described second resistance, the other end ground connection of described the 4th electric capacity, the emitter of described the first transistor is connected with first end of described the 3rd resistance and first end of described second electric capacity respectively, the base stage of described transistor seconds respectively with second end of described second electric capacity, first end of described the 5th resistance is connected with second end of described the 4th resistance, the emitter of described transistor seconds is connected with the described the 3rd transistorized base stage with first end of described the 6th resistance respectively, the described the 3rd transistorized collector electrode is connected with the described the 4th transistorized base stage with first end of described the 8th resistance respectively, the described the 3rd transistorized emitter is connected with first end of described the 9th resistance and first end of described the 4th electric capacity respectively, the described the 4th transistorized collector electrode is connected with second end of described the tenth resistance and second end of described the 5th electric capacity respectively, the described the 4th transistorized emitter is connected with first end of described the 11 resistance and first end of described the 6th electric capacity respectively, second end of described the 6th resistance is connected with first end of described output port, second end of described output port respectively with second end of described the 4th electric capacity, second end of described first resistance, second end of described the 3rd resistance, second end of described the 5th resistance, second end of described the 6th resistance, second end of described the 9th resistance and second end of described the 11 resistance are connected back ground connection.
Particularly, also comprise disconnect, described disconnect and described active antenna circuit form the closed-loop path.
Further, described power supply is the 9V DC power supply.
The beneficial effects of the utility model are:
The utility model can improve range of receiving and the sensitivity of antenna, the gain of 14-20dB is provided at shortwave and amateur radio frequency 1-30MHZ, be that the short antenna of 1/4 wavelength is previous very little and relative impedance height of order with respect to receive frequency, be 20dB from the gain of 1-18MHz, in 30MHz to 14 decibel, descend gradually, be applicable to the reception of shortwave.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model comprises transmitting antenna ANT, input interface J1, power supply U, the first transistor Q1, transistor seconds Q2, the 3rd transistor Q3, the 4th transistor Q4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10 and the 11 resistance R 11, the cathode output end of power supply U respectively with first end of second resistance R 2, first end of the 4th resistance R 4, the collector electrode of transistor seconds Q2, first end of the 7th resistance R 7, first end of the tenth resistance R 10, first end of the 7th capacitor C 7, first end of the 8th capacitor C 8 connects, second end of the 8th capacitor C 8 respectively with the cathode output end of power supply U, second end of the 7th capacitor C 7 is connected with first end of the 5th capacitor C 5, second end of the tenth resistance R 10 is connected with the collector electrode of the 4th transistor Q4 and second end of the 5th capacitor C 5 respectively, the base stage of the first transistor Q1 is connected with first end of first capacitor C 1 and first end of first resistance R 1, second end of first capacitor C 1 is connected with transmitting antenna ANT, be connected with the 4th capacitor C 4 between second end of the collector electrode of the first transistor Q1 and second resistance R 2, the other end ground connection of the 4th capacitor C 4, the emitter of the first transistor Q1 is connected with first end of the 3rd resistance R 3 and first end of second capacitor C 2 respectively, the base stage of transistor seconds Q2 respectively with second end of second capacitor C 2, first end of the 5th resistance R 5 is connected with second end of the 4th resistance R 4, the emitter of transistor seconds Q2 is connected with first end of the 6th resistance R 6 and the base stage of the 3rd transistor Q3 respectively, the collector electrode of the 3rd transistor Q3 is connected with first end of the 8th resistance R 8 and the base stage of the 4th transistor Q4 respectively, the emitter of the 3rd transistor Q3 is connected with first end of the 9th resistance R 9 and first end of the 4th capacitor C 4 respectively, the collector electrode of the 4th transistor Q4 is connected with second end of the tenth resistance R 10 and second end of the 5th capacitor C 5 respectively, the emitter of the 4th transistor Q4 is connected with first end of the 11 resistance R 11 and first end of the 6th capacitor C 6 respectively, second end of the 6th resistance C6 is connected with first end of output port J1, second end of output port J1 respectively with second end of the 4th capacitor C 4, second end of first resistance R 1, second end of the 3rd resistance R 3, second end of the 5th resistance R 5, second end of the 6th resistance R 6, second end of the 9th resistance R 9 is connected back ground connection with second end of the 11 resistance R 11.
As shown in Figure 1, also comprise disconnect S1, disconnect S1 and active antenna circuit form the closed-loop path, and power supply U is the 9V DC power supply.
Claims (3)
1. one kind is used for wireless active antenna, it is characterized in that: comprise transmitting antenna, input interface, power supply, the first transistor, transistor seconds, the 3rd transistor, the 4th transistor, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance and the 11 resistance, the cathode output end of described power supply respectively with first end of described second resistance, first end of described the 4th resistance, the collector electrode of described transistor seconds, first end of described the 7th resistance, first end of described the tenth resistance, first end of described the 7th electric capacity, first end of described the 8th electric capacity connects, second end of described the 8th electric capacity respectively with the cathode output end of described power supply, second end of described the 7th electric capacity is connected with first end of described the 5th electric capacity, second end of described the tenth resistance is connected with second end of the described the 4th transistorized collector electrode and described the 5th electric capacity respectively, the base stage of described the first transistor is connected with first end of described first electric capacity and first end of described first resistance, second end of described first electric capacity is connected with described transmitting antenna, be connected with the 4th electric capacity between second end of the collector electrode of described the first transistor and described second resistance, the other end ground connection of described the 4th electric capacity, the emitter of described the first transistor is connected with first end of described the 3rd resistance and first end of described second electric capacity respectively, the base stage of described transistor seconds respectively with second end of described second electric capacity, first end of described the 5th resistance is connected with second end of described the 4th resistance, the emitter of described transistor seconds is connected with the described the 3rd transistorized base stage with first end of described the 6th resistance respectively, the described the 3rd transistorized collector electrode is connected with the described the 4th transistorized base stage with first end of described the 8th resistance respectively, the described the 3rd transistorized emitter is connected with first end of described the 9th resistance and first end of described the 4th electric capacity respectively, the described the 4th transistorized collector electrode is connected with second end of described the tenth resistance and second end of described the 5th electric capacity respectively, the described the 4th transistorized emitter is connected with first end of described the 11 resistance and first end of described the 6th electric capacity respectively, second end of described the 6th resistance is connected with first end of described output port, second end of described output port respectively with second end of described the 4th electric capacity, second end of described first resistance, second end of described the 3rd resistance, second end of described the 5th resistance, second end of described the 6th resistance, second end of described the 9th resistance and second end of described the 11 resistance are connected back ground connection.
2. a kind of active antenna according to claim 1 is characterized in that: also comprise disconnect, described disconnect and described active antenna circuit formation closed-loop path.
3. a kind of active antenna according to claim 1, it is characterized in that: described power supply is the 9V DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320198194 CN203232960U (en) | 2013-04-19 | 2013-04-19 | Active antenna applied to radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320198194 CN203232960U (en) | 2013-04-19 | 2013-04-19 | Active antenna applied to radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232960U true CN203232960U (en) | 2013-10-09 |
Family
ID=49289064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320198194 Expired - Fee Related CN203232960U (en) | 2013-04-19 | 2013-04-19 | Active antenna applied to radio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232960U (en) |
-
2013
- 2013-04-19 CN CN 201320198194 patent/CN203232960U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140419 |