CN203104422U - A short-wave receiving antenna adapter connected by a single radio frequency cable - Google Patents
A short-wave receiving antenna adapter connected by a single radio frequency cable Download PDFInfo
- Publication number
- CN203104422U CN203104422U CN 201220747615 CN201220747615U CN203104422U CN 203104422 U CN203104422 U CN 203104422U CN 201220747615 CN201220747615 CN 201220747615 CN 201220747615 U CN201220747615 U CN 201220747615U CN 203104422 U CN203104422 U CN 203104422U
- Authority
- CN
- China
- Prior art keywords
- circuit
- short
- radio frequency
- signal
- antenna adapter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a short-wave receiving antenna adapter connected by a single radio frequency cable. The short-wave receiving antenna adapter receives a signal from a short-wave antenna and is connected with a short-wave receiver through the single radio frequency cable in order to transmit supply voltage, audio control signal, and a radio frequency signal. The short-wave receiving antenna adapter comprises a controlling and voltage-converting circuit, an interface circuit, a master matching circuit, an antenna adaptive circuit, and a radio frequency amplifying circuit. The interface circuit, the master matching circuit, the antenna adaptive circuit, and the radio frequency amplifying circuit are connected with the controlling and voltage-converting circuit. The interface circuit extracts the voltage signal and the audio control signal of a high-frequency cable through the single radio frequency cable and performs demodulation processing on the radio frequency signal and couples the radio frequency signal to the high-frequency cable. The master matching circuit is used for converting the frequency of a signal received from the short-wave antenna. The antenna adaptive circuit may adjusts network parameters. The controlling and voltage-converting circuit performs demodulation processing on the audio control signal and is used for controlling the antenna adaptive circuit and the master matching circuit. The short-wave receiving antenna adapter may increase the signal to noise ratio and the anti-interference capability of the received signal.
Description
Technical field
The utility model relates to electronic circuit design field, in particular to a kind of short-wave receiving antenna adapter of single radio frequency cable connection.
Background technology
Become the characteristics of decline when the short wave communication signal has, the situation of reception difference often occurs.People can be by optimizing code encoding/decoding mode, improve receiving gain, but at the short wave channel environment than under the condition of severe, improving effect also is not clearly.And, short-wave receiving antenna is carried out tuning coupling by in radio-frequency front-end optimization, and improve the gain of short-wave reception signal, often can bring better reception.By many cables such as control line, power lines tuning coupling is controlled in the short-wave reception sky and can be realized, but there is more, the easy problem such as disturbed of cable in this method, antijamming capability is relatively poor.
The utility model content
At the defective that exists in the prior art, the utility model purpose is to propose the short-wave receiving antenna adapter that a kind of single radio frequency cable connects, be connected directly to short-wave receiver by single radio frequency cable, can effectively improve the signal to noise ratio and the antijamming capability of received signal.
For achieving the above object, the utility model proposes the short-wave receiving antenna adapter that a kind of single radio frequency cable connects, be connected with short-wave receiver in order to the transmission supply power voltage from the short-wave antenna received signal and by single radio frequency cable, audio control signal and radiofrequency signal, this short-wave receiving antenna adapter comprises control and voltage conversion circuit and the interface circuit that is connected with voltage conversion circuit with this control, main match circuit, antenna adapter circuit and radio frequency amplifying circuit, wherein: interface circuit extracts the voltage signal and the audio control signal of high frequency cable by aforesaid single radio frequency cable, simultaneously radiofrequency signal is carried out demodulation process and is coupled in the high frequency cable; Main match circuit is in order to carry out frequency translation to the signal that receives from short-wave antenna; The antenna adapter circuit passes through sampling and the calculating to the radiofrequency signal of main match circuit output, and the adhesive and the disconnection of control internal relay are to adjust network parameter; Control and voltage conversion circuit carry out demodulation process and are respectively applied for the control antenna adapter circuit and main match circuit audio control signal, and antenna adapter circuit and main match circuit are operated accordingly according to the command execution of receiving.
Further, aforesaid control and the aforesaid voltage signal of voltage conversion circuit conversion are to provide the operating voltage of other circuit in the short-wave receiving antenna adapter.
Further, use the impedance transformer network of 50 Ω in the aforesaid main match circuit, it comprises adjustable shunt capacitance and adjustable series inductance and secondary network capacitance.
Further, aforesaid control and voltage conversion circuit comprise single chip computer AT 89C2051, audio frequency demodulation module, amplifier TL084 and correspondent peripheral circuit.
Further, aforesaid antenna adapter circuit comprises dsp chip and CPLD device, draw precise impedance and phase value by AD sampling and the radiofrequency signal of calculating main match circuit output, according to gained impedance and phase information, the adhesive and the disconnection of control internal relay are adjusted network parameter.
Further, comprise crystal filter in the aforesaid radio frequency amplifying circuit, in order to guarantee amplitude-frequency consistency and outer other signal interference of inhibition zone in the passband.
By above the technical solution of the utility model as can be known, the short-wave receiving antenna adapter that single radio frequency cable of the present utility model connects, can improve the frequency response of reception antenna, make its reception difference in whole frequency less relatively, it is fine to avoid reception antenna to receive on resonance point, and the disadvantage of weak effect on other Frequency point, this antenna adapter has stronger radio frequency amplifying power simultaneously, be fit to and short-wave receiver between radio frequency cable long, the occasion that signal attenuation is big, can improve signal to noise ratio, the intermodulation that is produced is reflected in the circulation that reduces received signal, reduce the received signal error rate, and install simple.
Description of drawings
Fig. 1 is the short-wave receiving antenna adaptor module schematic diagram of the utility model preferred embodiment.
Fig. 2 is the schematic diagram of impedance transformer network.
Fig. 3 is the schematic diagram of radio frequency amplifying circuit.
Embodiment
In order more to understand technology contents of the present utility model, especially exemplified by specific embodiment and cooperate appended graphic being described as follows.
As shown in Figure 1, according to preferred embodiment of the present utility model, the short-wave receiving antenna adapter is installed in the bottom of short-wave receiving antenna and from the short-wave receiving antenna received signal, the short-wave receiving antenna adapter has a shell, is made by waterproof, structural member anticorrosive, that have higher mechanical strength.
The short-wave receiving antenna adapter is connected with short-wave receiver by single radio frequency cable, in order to transmission supply power voltage, audio control signal and radiofrequency signal.The short-wave receiving antenna adapter comprises main match circuit, antenna adapter circuit, radio frequency amplifying circuit, interface circuit and control and change in voltage circuit, and wherein control is connected main match circuit, antenna adapter circuit, radio frequency amplifying circuit and interface circuit with the change in voltage circuit.
Interface circuit be used for by be attached thereto the single radio frequency cable that connects extract high frequency cable+24V voltage signal and audio control signal, simultaneously radiofrequency signal is carried out demodulation process and is coupled in the high frequency cable.
In control and voltage conversion circuit, audio control signal is carried out demodulation process.The control of present embodiment and voltage conversion circuit comprise single chip computer AT 89C2051, audio frequency demodulation module, amplifier TL084 and correspondent peripheral circuit.Audio control signal is through amplifier TL084 and peripheral circuit bandpass filtering thereof, be transformed into the Transistor-Transistor Logic level signal after the detection, pass through for example MAX232 chip of level transferring chip then, change the RS-232 signal into, be respectively applied for control antenna adapter circuit and main match circuit, antenna adapter circuit and main match circuit are operated accordingly according to the command execution of receiving.
Simultaneously, in control and voltage conversion circuit, right+24V voltage signal carries out conversion, is transformed to the needed operating voltage of other circuit workings, comprise ± 12V ,+5V and+3.3V voltage etc.
The problem that can have the impedance matching ability when using general antenna receiving signal, antenna has 1～2 resonance point usually, so need to increase main match circuit to improve the signal reception.In the present embodiment, use the impedance transformer network of 50 Ω in the main match circuit, improve the impedance matching ability that receives, have high selectivity to receive desired signal, have the lowest noise degree, improve the sensitivity that receives, gain can reach 5dB～10dB.Impedance transformer network principle model figure as shown in Figure 2, impedance transformer network adopts adjustable shunt capacitance and adjustable series inductance and secondary network capacitance (2), the signal that short-wave receiving antenna is received carries out frequency translation.
In the antenna adapter circuit, adopt dsp chip and CPLD device, the CPLD device that preferably capacity is bigger, draw precise impedance and phase value by AD sampling and the radiofrequency signal of calculating main match circuit output, according to gained impedance and phase information, the adhesive and the disconnection of control internal relay are adjusted network parameter.
Consider that the high-frequency radio frequency line is longer, the radiofrequency signal decay is bigger, can influence signal receiving performance, so increase the loss of radio frequency amplifier compensating cable, is transferred to short-wave receiver again after signal is amplified.Big, the low noise circuit of radio frequency amplifying circuit employing frequency dynamic scope in the present embodiment is to guarantee to receive index.Be illustrated in figure 3 as the radio frequency amplifying circuit functional schematic, radio frequency amplifying circuit adopts high-quality crystal filter to carry out Filtering Processing in the present embodiment, can guarantee amplitude-frequency consistency in the passband, outer other signal of inhibition zone disturbs, adopting accurate controllable amplifier to carry out signal simultaneously amplifies, the gain linearity degree is good, the precision height.
In sum, the short-wave receiving antenna adapter that single radio frequency cable of the present utility model connects, can improve the frequency response of reception antenna, make its reception difference in whole frequency less relatively, it is fine to avoid reception antenna to receive on resonance point, and the disadvantage of weak effect on other Frequency point, this antenna adapter has stronger radio frequency amplifying power simultaneously, be fit to and short-wave receiver between radio frequency cable long, the occasion that signal attenuation is big, can improve signal to noise ratio, the intermodulation that is produced is reflected in the circulation that reduces received signal, reduce the received signal error rate, and install simple.
Though the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Have in the technical field under the utility model and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection range of the present utility model is as the criterion when looking claims person of defining.
Claims (6)
1. short-wave receiving antenna adapter that single radio frequency cable connects, this short-wave receiving antenna adapter is connected with short-wave receiver in order to transmission supply power voltage, audio control signal and radiofrequency signal from the short-wave antenna received signal and by single radio frequency cable, it is characterized in that this short-wave receiving antenna adapter comprises:
Control and voltage conversion circuit and the interface circuit that is connected with voltage conversion circuit with this control, main match circuit, antenna adapter circuit and radio frequency amplifying circuit,
Wherein: interface circuit extracts the voltage signal and the audio control signal of high frequency cable by aforesaid single radio frequency cable, simultaneously radiofrequency signal is carried out demodulation process and is coupled in the high frequency cable; Main match circuit is in order to carry out frequency translation to the signal that receives from short-wave antenna; The antenna adapter circuit passes through sampling and the calculating to the radiofrequency signal of main match circuit output, and the adhesive and the disconnection of control internal relay are to adjust network parameter; Control and voltage conversion circuit carry out demodulation process and are respectively applied for the control antenna adapter circuit and main match circuit audio control signal, and antenna adapter circuit and main match circuit are operated accordingly according to the command execution of receiving.
2. the short-wave receiving antenna adapter that connects according to the described single radio frequency cable of claim 1 is characterized in that, aforesaid control and voltage conversion circuit also the aforesaid voltage signal of conversion so that the operating voltage of other circuit in the short-wave receiving antenna adapter to be provided.
3. the short-wave receiving antenna adapter that connects according to the described single radio frequency cable of claim 1 is characterized in that aforesaid control and voltage conversion circuit comprise single chip computer AT 89C2051, audio frequency demodulation module, amplifier TL084 and correspondent peripheral circuit.
4. the short-wave receiving antenna adapter that connects according to the described single radio frequency cable of claim 1 is characterized in that, uses the impedance transformer network of 50 Ω in the aforesaid main match circuit, and it comprises adjustable shunt capacitance and adjustable series inductance and secondary network capacitance.
5. the short-wave receiving antenna adapter that connects according to the described single radio frequency cable of claim 1 is characterized in that aforesaid antenna adapter circuit comprises dsp chip and CPLD device.
6. the short-wave receiving antenna adapter that connects according to the described single radio frequency cable of claim 1 is characterized in that, comprises crystal filter in the aforesaid radio frequency amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747615 CN203104422U (en) | 2012-12-31 | 2012-12-31 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747615 CN203104422U (en) | 2012-12-31 | 2012-12-31 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203104422U true CN203104422U (en) | 2013-07-31 |
Family
ID=48855795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220747615 Expired - Fee Related CN203104422U (en) | 2012-12-31 | 2012-12-31 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203104422U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078651A (en) * | 2012-12-31 | 2013-05-01 | 熊猫电子集团有限公司 | Short wave receiving antenna adapter connected with single radio-frequency cable |
| CN107356803A (en) * | 2017-07-14 | 2017-11-17 | 国家新闻出版广电总局四九台 | A kind of security detection equipment for overhauling high-power short-wave antenna feed line |
-
2012
- 2012-12-31 CN CN 201220747615 patent/CN203104422U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078651A (en) * | 2012-12-31 | 2013-05-01 | 熊猫电子集团有限公司 | Short wave receiving antenna adapter connected with single radio-frequency cable |
| CN103078651B (en) * | 2012-12-31 | 2016-01-20 | 熊猫电子集团有限公司 | The short-wave receiving antenna adapter that single radio-frequency cable connects |
| CN107356803A (en) * | 2017-07-14 | 2017-11-17 | 国家新闻出版广电总局四九台 | A kind of security detection equipment for overhauling high-power short-wave antenna feed line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2079170B1 (en) | Receiving circuit and receiving method for receiving intermediate frequency signal | |
| CN203104422U (en) | A short-wave receiving antenna adapter connected by a single radio frequency cable | |
| CN204228950U (en) | A kind of radar system L-band transceiver | |
| CN202798694U (en) | Short wave rear selector | |
| CN105187343A (en) | Method and device for reducing self interference in same-time and same-frequency full-duplex system | |
| CN114710170A (en) | Medium-long wave automatic antenna tuning circuit and system | |
| CN111416637B (en) | Railway train reconnection induction communication equipment and anti-interference method | |
| CN105450258A (en) | Wireless bridging carrier communication device | |
| CN111817753A (en) | Zero-insertion-loss medium-voltage coupling device | |
| CN103078651B (en) | The short-wave receiving antenna adapter that single radio-frequency cable connects | |
| CN201142720Y (en) | Radio-frequency head, satellite digital television signal receiving and processing circuit and receiving system | |
| CN204206115U (en) | A kind of amplifying circuit for wireless short wave transmitting antenna | |
| CN204145491U (en) | A kind of network data Integrated Service Digital Network transmitter | |
| CN213342193U (en) | Anti-interference receiving antenna circuit | |
| CN101090290A (en) | Plough time service integral receive antenna | |
| CN202077016U (en) | Duplex communication circuit and mobile communication terminal | |
| CN202799090U (en) | Very high frequency aeronautical communication land radio station terminal module | |
| CN205961120U (en) | Multiplexer device | |
| CN201774517U (en) | Intelligent high-sensitivity receiver circuit | |
| CN215452936U (en) | Wireless transceiver supporting Wi-SUN protocol | |
| CN214756257U (en) | Low-noise amplifier module | |
| CN214154517U (en) | Q-band satellite power amplifier control circuit and device | |
| CN217849415U (en) | Radio frequency system and radio frequency device | |
| CN218547335U (en) | Long-distance wireless transmission low-power consumption circuit | |
| CN214851238U (en) | Photoelectric conversion communication equipment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20181231 |