CN103078651A - Short wave receiving antenna adapter connected with single radio-frequency cable - Google Patents
Short wave receiving antenna adapter connected with single radio-frequency cable Download PDFInfo
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- CN103078651A CN103078651A CN2012105918701A CN201210591870A CN103078651A CN 103078651 A CN103078651 A CN 103078651A CN 2012105918701 A CN2012105918701 A CN 2012105918701A CN 201210591870 A CN201210591870 A CN 201210591870A CN 103078651 A CN103078651 A CN 103078651A
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Abstract
The invention provides a short wave receiving antenna adapter connected with a single radio-frequency cable. The short wave receiving antenna adapter receives signals from a short wave antenna and is connected with a short wave receiver through the single radio-frequency cable to transmit power supply voltage, audio control signals and radio-frequency signals. The short wave receiving antenna adapter comprises a control and voltage conversion circuit, and an interface circuit, a main matching circuit, an antenna adapter circuit and a radio-frequency amplification circuit which are connected with the control and voltage conversion circuit, wherein the interface circuit is used for extracting the voltage signals and audio control signals of a high-frequency cable through the single radio-frequency circuit, demodulating the radio-frequency signals and coupling the radio-frequency signals to the high-frequency cable; the main matching circuit is used for conducting frequency conversion to the signals which are received from the short wave antenna; the antenna adapter circuit can be used for adjusting network parameters; and the control and voltage conversion circuit is used for demodulating the audio control signals and controlling the antenna adapter circuit and the main matching circuit. The short wave receiving antenna adapter provided by the invention can improve the signal-to-noise ratio and the anti-interference capability of the received signals.
Description
Technical field
The present invention 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 poor situation of reception often occurs.People can be by optimizing code encoding/decoding mode, improving receiving gain, and still in the more abominable situation of short wave channel environment, improving effect also is not clearly.And by in radio-frequency front-end optimization, short-wave receiving antenna is carried out resonance matching, and improve the gain of short-wave reception signal, often can bring better reception.By multi-cables such as control line, power lines resonance matching 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 the method, antijamming capability is relatively poor.
Summary of the invention
For the defective that exists in the prior art, the object of the invention 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, but Effective Raise receives signal to noise ratio and the antijamming capability of signal.
For achieving the above object, the present invention proposes the short-wave receiving antenna adapter that a kind of single radio frequency cable connects, receive signal and be connected to transmit supply power voltage with short-wave receiver by single radio frequency cable from short-wave antenna, audio control signal and radiofrequency signal, this short-wave receiving antenna adapter comprises that control is connected the interface circuit that is connected with voltage conversion circuit with this control with voltage conversion circuit, main match circuit, antenna adapter circuit and radio frequency amplifying circuit, wherein: interface circuit extracts 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 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 to the control antenna adapter circuit and main match circuit audio control signal, and antenna adapter circuit and main match circuit operate 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 corresponding peripheral circuit.
Further, aforesaid antenna adapter circuit comprises dsp chip and CPLD device, draw accurate impedance and phase value by AD sampling and the radiofrequency signal of calculating main match circuit output, according to gained impedance and phase information, 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 equalization and outer other signal interference of inhibition zone in the passband.
By above technical scheme of the present invention as can be known, the short-wave receiving antenna adapter that single radio frequency cable of the present invention connects, can improve the frequency response of reception antenna, make its reception difference less in whole frequency range, avoid reception antenna to receive fine at 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 large, can improve signal to noise ratio, reduce to receive the intermodulation that the Circulated reflection of signal produces, reduce the bit error rate of received signal, and install simple.
Description of drawings
Fig. 1 is the short-wave receiving antenna adaptor module schematic diagram of preferred embodiment of the present invention.
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 invention, 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 invention, the short-wave receiving antenna adapter is installed in the bottom of short-wave receiving antenna and receives signal from short-wave receiving antenna, and 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 transmit 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 corresponding 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, then pass through for example MAX232 chip of level transferring chip, change the RS-232 signal into, be respectively applied to control antenna adapter circuit and main match circuit, antenna adapter circuit and main match circuit operate 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 larger, draw accurate impedance and phase value by AD sampling and the radiofrequency signal of calculating main match circuit output, according to gained impedance and phase information, adhesive and the disconnection of control internal relay are adjusted network parameter.
Consider that the high-frequency radio frequency line is longer, radio frequency signal attenuation is larger, can affect signal receiving performance, so increase the loss of radio frequency amplifier compensating cable, is transferred to short-wave receiver after signal is amplified again.Large, the low noise circuit of radio frequency amplifying circuit proportion dynamic range 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 the filtering processing in the present embodiment, can guarantee amplitude-frequency equalization in the passband, outer other signal of inhibition zone disturbs, adopting simultaneously accurate controllable amplifier to carry out signal amplifies, the gain linearity degree is good, and precision is high.
In sum, the short-wave receiving antenna adapter that single radio frequency cable of the present invention connects, can improve the frequency response of reception antenna, make its reception difference less in whole frequency range, avoid reception antenna to receive fine at 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 large, can improve signal to noise ratio, reduce to receive the intermodulation that the Circulated reflection of signal produces, reduce the bit error rate of received signal, and install simple.Although the present invention discloses as above with preferred embodiment, so it is not to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention 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 receives signal and is connected to transmit supply power voltage, audio control signal and radiofrequency signal with short-wave receiver by single radio frequency cable from short-wave antenna, it is characterized in that this short-wave receiving antenna adapter comprises:
Interface circuit, main match circuit, antenna adapter circuit and the radio frequency amplifying circuit that is connected with voltage conversion circuit with this control is connected in control with voltage conversion circuit,
Wherein: interface circuit extracts 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 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 to the control antenna adapter circuit and main match circuit audio control signal, and antenna adapter circuit and main match circuit operate accordingly according to the command execution of receiving.
2. the short-wave receiving antenna adapter that connects of described single radio frequency cable according to 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 of described single radio frequency cable according to 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 corresponding peripheral circuit.
4. the short-wave receiving antenna adapter that connects of described single radio frequency cable according to claim 1 is characterized in that 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.
5. the short-wave receiving antenna adapter that connects of described single radio frequency cable according to claim 1, it is characterized in that, aforesaid antenna adapter circuit comprises dsp chip and CPLD device, draw accurate impedance and phase value by AD sampling and the radiofrequency signal of calculating main match circuit output, according to gained impedance and phase information, adhesive and the disconnection of control internal relay are adjusted network parameter.
6. the short-wave receiving antenna adapter that connects of described single radio frequency cable according to claim 1 is characterized in that, comprises crystal filter in the aforesaid radio frequency amplifying circuit, disturbs in order to guarantee in the passband amplitude-frequency equalization and outer other signal of inhibition zone.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210591870.1A CN103078651B (en) | 2012-12-31 | 2012-12-31 | The short-wave receiving antenna adapter that single radio-frequency cable connects |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210591870.1A CN103078651B (en) | 2012-12-31 | 2012-12-31 | The short-wave receiving antenna adapter that single radio-frequency cable connects |
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| CN103078651A true CN103078651A (en) | 2013-05-01 |
| CN103078651B CN103078651B (en) | 2016-01-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261741A (en) * | 1998-12-09 | 2000-08-02 | 索尼公司 | Short wave receiver and antenna adapter |
| JP2001016128A (en) * | 1999-06-30 | 2001-01-19 | Maspro Denkoh Corp | Converter for two satellite receiving antenna |
| CN101312354A (en) * | 2008-05-30 | 2008-11-26 | 北京创毅视讯科技有限公司 | Aerial matching circuit and aerial matching method |
| CN203104422U (en) * | 2012-12-31 | 2013-07-31 | 熊猫电子集团有限公司 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
-
2012
- 2012-12-31 CN CN201210591870.1A patent/CN103078651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261741A (en) * | 1998-12-09 | 2000-08-02 | 索尼公司 | Short wave receiver and antenna adapter |
| JP2001016128A (en) * | 1999-06-30 | 2001-01-19 | Maspro Denkoh Corp | Converter for two satellite receiving antenna |
| CN101312354A (en) * | 2008-05-30 | 2008-11-26 | 北京创毅视讯科技有限公司 | Aerial matching circuit and aerial matching method |
| CN203104422U (en) * | 2012-12-31 | 2013-07-31 | 熊猫电子集团有限公司 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
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| CN103078651B (en) | 2016-01-20 |
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Effective date of registration: 20240314 Address after: 210046 Within Nanjing Economic and Technological Development Zone, Jiangsu Province (No. 301 Zhongshan East Road, Xuanwu District) Patentee after: PANDA ELECTRONICS GROUP Co.,Ltd. Country or region after: China Address before: 210002 No. 301 East Zhongshan Road, Jiangsu, Nanjing Patentee before: PANDA ELECTRONICS GROUP Co.,Ltd. Country or region before: China Patentee before: NANJING PANDA HANDA TECHNOLOGY Co.,Ltd. |
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