CN213342205U - Digital maritime affairs VHF radio station - Google Patents
Digital maritime affairs VHF radio station Download PDFInfo
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- CN213342205U CN213342205U CN202022763484.9U CN202022763484U CN213342205U CN 213342205 U CN213342205 U CN 213342205U CN 202022763484 U CN202022763484 U CN 202022763484U CN 213342205 U CN213342205 U CN 213342205U
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Abstract
The utility model provides a digital maritime affairs VHF radio station, including power amplifier module, radio frequency module, audio module, modulation module and power module, the power amplifier module is used for switching transmission and receiving state to and be used for carrying out power amplification to the signal, radio frequency module links to each other with the power amplifier module for demodulate received signal, audio module links to each other with radio frequency module, is used for handling transmission and received audio signal, the modulation module both ends link to each other with audio module and power amplifier module respectively, are used for producing the transmission very high frequency signal. The utility model discloses can effective filtering low frequency signal for the circuit can the steady operation, can effectively avoid the influence of the low input impedance of next-level, and the interference killing feature is strong.
Description
Technical Field
The utility model relates to a radio station technical field particularly, relates to a digital maritime affairs VHF radio station.
Background
The maritime VHF radio station, also called maritime VHF radio station, refers to a radio transceiver device provided on a ship, an offshore platform or a facility for communication services related to transportation, shipping management and the like. The maritime VHF radio station has basic communication functions of sending and receiving ship-to-ship distress alarm function, receiving bank-to-ship distress alarm, sending and receiving search and rescue coordination communication, sending and receiving rescue site communication, receiving and sending marine safety information, sending and receiving daily communication related to ship transportation and shipping management, sending and receiving safety avoidance communication of a driving platform to the driving platform and the like.
The existing maritime VHF radio station has the defects of poor anti-interference capability and signal distortion.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a digital maritime affairs VHF radio station has solved the problem that the maritime affairs VHF radio station interference killing feature is poor among the prior art, signal distortion.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a digital maritime affairs VHF radio station, includes power amplifier module, radio frequency module, audio frequency module, modulation module and power module, power amplifier module is used for switching transmission and receiving state to and be used for carrying out power amplification to the signal, radio frequency module links to each other with power amplifier module, is used for demodulating received signal, audio frequency module links to each other with radio frequency module, is used for handling transmission and received audio signal, the modulation module both ends link to each other with audio frequency module and power amplifier module respectively for produce the transmission very high frequency signal.
Preferably, the modulation module includes a voltage-controlled oscillator, the voltage-controlled oscillator includes a frequency modulation circuit, a power filter circuit, a control circuit and an oscillation circuit, one end of the frequency modulation circuit is connected to the power filter circuit, the other end of the frequency modulation circuit is connected to the control circuit through a capacitor C49, the control circuit is connected to the power filter circuit and the oscillation circuit through a MOS transistor Q2, and a resistor R147 is connected between the oscillation circuit and the power filter circuit.
Preferably, the frequency modulation circuit comprises a capacitor C47, a resistor R143, a resistor R144, a diode D1, a capacitor C48 and an electrolytic capacitor C8H10, one end of the capacitor C47 is grounded, the other end of the capacitor C47 is connected with the resistor R143, the other end of the resistor R143 is connected with a first common end of the diode D1 and the resistor R144, the first common end is connected with the capacitor C49, the other end of the resistor R144 is connected with a second common end of the capacitor C48 and the electrolytic capacitor C8H10, and the second common end is connected with the power supply filter circuit.
Preferably, the control circuit comprises a resistor R149, a capacitor C52, an inductor L1, a diode D3, a diode D2, an inductor L2, a capacitor C54 and a capacitor C57, the resistor R149 is connected with one ends of the capacitor C52 and the inductor L1, the other end of the inductor L1 is connected with a third common end of the diode D3 and the diode D2, the third common end is connected with the capacitor C49, the other end of the diode D2 is connected with a fourth common end of the inductor L2 and the capacitor C54, the fourth common end is connected with a base of the MOS transistor Q2, and the capacitor C57 is connected with the capacitor C54, and the capacitor C57 is connected with the oscillation circuit through a conducting wire.
Preferably, the power supply filter circuit comprises a transistor Q1, a capacitor C46, an electrolytic capacitor C8H9, a resistor R141 and a resistor R147, one end of the resistor R141 is connected with a fifth common end of the capacitor C46 and the electrolytic capacitor C8H9, the fifth common end is connected with a base electrode of the transistor Q1, and an emitter electrode of the transistor Q1 is connected with an S electrode of the MOS transistor Q2 and the resistor R147.
Preferably, the oscillation circuit includes a capacitor C53, an inductor L3, a resistor R152, a capacitor C55, a transistor Q3, a capacitor C56, an inductor L4, and a resistor R155, one end of the inductor L3 is connected to the resistor R147, the capacitor C53, and the resistor R152, and the other end thereof is connected to the S-pole of the transistor Q3 and the capacitor C55, the other end of the resistor R152 is connected to the capacitor C56 and the G-pole of the transistor Q3, the D-pole of the transistor Q3 is grounded, the other end of the capacitor C56 is connected to the inductor L4 and the D-pole of the MOS transistor Q2, and the other end of the inductor L4 is connected to the resistor R155.
Compared with the prior art, the beneficial effects of the utility model include: the VHF radio station adopts a voltage-controlled oscillator consisting of a frequency modulation circuit, a power supply filter circuit, a control circuit and an oscillation circuit, wherein the frequency modulation circuit receives GMSK signals sent by an audio module, and the signals realize the frequency modulation of the signals by controlling the capacitance value of a varactor diode D1, so that the radio station is stable and reliable; the low-frequency signal can be effectively filtered by the power supply filter circuit, so that the circuit can stably work; the oscillating circuit can effectively avoid the influence of the next-stage low input impedance, and has strong anti-interference capability.
Drawings
The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
fig. 1 is a schematic structural diagram of a digital maritime VHF radio station according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a modulation module according to an embodiment of the present invention.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
An embodiment according to the present invention is shown in conjunction with fig. 1. The utility model provides a digital maritime affairs VHF radio station, including power amplifier module, the radio frequency module, the audio frequency module, modulation module and power module, power amplifier module is used for switching transmission and receiving state, and be used for carrying out power amplification to the signal, the radio frequency module links to each other with power amplifier module, be used for demodulating received signal, the audio frequency module links to each other with the radio frequency module, be used for handling transmission and received audio signal, the modulation module both ends link to each other with audio frequency module and power amplifier module respectively, be used for producing the very high frequency signal of transmission, power module is connected with the radio frequency module, be used for providing the electric energy for each module.
As shown in fig. 2, the modulation module includes a voltage-controlled oscillator, the voltage-controlled oscillator includes a frequency modulation circuit, a power filter circuit, a control circuit and an oscillation circuit, one end of the frequency modulation circuit is connected to the power filter circuit, the other end of the frequency modulation circuit is connected to the control circuit through a capacitor C49, the control circuit is connected to the power filter circuit and the oscillation circuit through a MOS transistor Q2, and a resistor R147 is connected between the oscillation circuit and the power filter circuit.
Specifically, the frequency modulation circuit comprises a capacitor C47, a resistor R143, a resistor R144, a diode D1, a capacitor C48 and an electrolytic capacitor C8H10, one end of the capacitor C47 is grounded, the other end of the capacitor C47 is connected with the resistor R143, the other end of the resistor R143 is connected with a first common end of the diode D1 and the resistor R144, the first common end is connected with the capacitor C49, the other end of the resistor R144 is connected with a second common end of the capacitor C48 and the electrolytic capacitor C8H10, and the second common end is connected with the power supply filter circuit.
In this embodiment, the control circuit includes a resistor R149, a capacitor C52, an inductor L1, a diode D3, a diode D2, an inductor L2, a capacitor C54, and a capacitor C57, where the resistor R149 is connected to one end of the capacitor C52 and one end of the inductor L1, the other end of the inductor L1 is connected to a third common terminal of the diode D3 and the diode D2, the third common terminal is connected to the capacitor C49, the other end of the diode D2 is connected to a fourth common terminal of the inductor L2 and the capacitor C54, the fourth common terminal is connected to the base of the MOS transistor Q2, and the capacitor C57 is connected to the capacitor C54, and connected to the oscillation circuit through a wire therebetween.
The power supply filter circuit comprises a triode Q1, a capacitor C46, an electrolytic capacitor C8H9, a resistor R141 and a resistor R147, one end of the resistor R141 is connected with a fifth common end of the capacitor C46 and the electrolytic capacitor C8H9, the fifth common end is connected with a base electrode of a triode Q1, and an emitting electrode of the triode Q1 is connected with an S pole of a MOS tube Q2 and the resistor R147.
The oscillating circuit comprises a capacitor C53, an inductor L3, a resistor R152, a capacitor C55, a triode Q3, a capacitor C56, an inductor L4 and a resistor R155, one end of the inductor L3 is connected with the resistor R147, the capacitor C53 and the resistor R152, the other end of the inductor L3 is connected with the S pole of the triode Q3 and the capacitor C55, the other end of the resistor R152 is connected with the capacitor C56 and the G pole of the triode Q3, the D pole of the triode Q3 is grounded, the other end of the capacitor C56 is connected with the inductor L4 and the D pole of the MOS transistor Q2, and the other end of the inductor L4 is connected with the resistor R155.
The utility model discloses a digital maritime affairs VHF radio station, this radio station have the transmission and receive two kinds of modes, and under receiving mode, radio frequency signal passes through the antenna and transmits the power amplifier module, sends radio frequency module through receiving and dispatching switch, carries out filtering, frequency-selecting and enlargies the back to the received signal in radio frequency module, transmits to audio frequency module, sends into after handling by audio frequency module and answers equipment.
In the transmitting mode, a transmitting signal enters the audio module, is amplified and then is sent to the modulation module, and the modulation module modulates the transmitting signal into a very high frequency signal, and then the very high frequency signal is subjected to secondary amplification and filtering processing through the power amplification module and then is transmitted out.
To sum up, the beneficial effects of the utility model include: the VHF radio station adopts a voltage-controlled oscillator consisting of a frequency modulation circuit, a power supply filter circuit, a control circuit and an oscillation circuit, wherein the frequency modulation circuit receives GMSK signals sent by an audio module, and the signals realize the frequency modulation of the signals by controlling the capacitance value of a varactor diode D1, so that the radio station is stable and reliable; the low-frequency signal can be effectively filtered by the power supply filter circuit, so that the circuit can stably work; the oscillating circuit can effectively avoid the influence of the next-stage low input impedance, and has strong anti-interference capability.
It should be understood that, in the present invention, the undisclosed circuit structure of the VHF radio station is the prior art, and is not described herein.
The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a digital maritime affairs VHF radio station, its characterized in that, includes power amplifier module, radio frequency module, audio module, modulation module and power module, power amplifier module is used for switching transmission and receiving state to and be used for carrying out power amplification to the signal, radio frequency module links to each other with power amplifier module, is used for demodulating received signal, audio module links to each other with radio frequency module, is used for handling transmission and received audio signal, the modulation module both ends link to each other with audio module and power amplifier module respectively for produce the transmission very high frequency signal.
2. The VHF radio station according to claim 1, wherein the modulation module comprises a voltage-controlled oscillator, the voltage-controlled oscillator comprises a frequency modulation circuit, a power supply filter circuit, a control circuit and an oscillation circuit, one end of the frequency modulation circuit is connected with the power supply filter circuit, the other end of the frequency modulation circuit is connected with the control circuit through a capacitor C49, the control circuit is connected with the power supply filter circuit and the oscillation circuit through a MOS tube Q2, and a resistor R147 is connected between the oscillation circuit and the power supply filter circuit.
3. The digital maritime VHF radio station of claim 2, wherein the frequency modulation circuit comprises a capacitor C47, a resistor R143, a resistor R144, a diode D1, a capacitor C48 and an electrolytic capacitor C8H10, one end of the capacitor C47 is connected to ground, the other end of the capacitor C47 is connected to the resistor R143, the other end of the resistor R143 is connected to a first common end of a diode D1 and the resistor R144, the first common end is connected to a capacitor C49, the other end of the resistor R144 is connected to a second common end of the capacitor C48 and the electrolytic capacitor C8H10, and the second common end is connected to a power supply filter circuit.
4. The VHF radio station as claimed in claim 2, wherein the control circuit comprises a resistor R149, a capacitor C52, an inductor L1, a diode D3, a diode D2, an inductor L2, a capacitor C54 and a capacitor C57, the resistor R149 is connected with one ends of the capacitor C52 and the inductor L1, the other end of the inductor L1 is connected with a third common end of the diode D3 and the diode D2, the third common end is connected with the capacitor C49, the other end of the diode D2 is connected with a fourth common end of the inductor L2 and the capacitor C54, the fourth common end is connected with the base of the MOS transistor Q2, and the capacitor C57 is connected with the capacitor C54 and connected with the oscillation circuit through a wire.
5. The VHF radio station as claimed in claim 2, wherein the power filter circuit comprises a transistor Q1, a capacitor C46, an electrolytic capacitor C8H9, a resistor R141 and a resistor R147, one end of the resistor R141 is connected with the fifth common terminal of the capacitor C46 and the electrolytic capacitor C8H9, the fifth common terminal is connected with the base of a transistor Q1, and the emitter of the transistor Q1 is connected with the S pole of the MOS transistor Q2 and the resistor R147.
6. The VHF radio station as claimed in claim 2, wherein the oscillating circuit comprises a capacitor C53, an inductor L3, a resistor R152, a capacitor C55, a transistor Q3, a capacitor C56, an inductor L4 and a resistor R155, one end of the inductor L3 is connected with the resistor R147, the capacitor C53 and the resistor R152, the other end of the inductor L3 is connected with the S pole of the transistor Q3 and the capacitor C55, the other end of the resistor R152 is connected with the capacitor C56 and the G pole of the transistor Q3, the D pole of the transistor Q3 is grounded, the other end of the capacitor C56 is connected with the inductor L4 and the D pole of the MOS transistor Q2, and the other end of the inductor L4 is connected with the resistor R155.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022763484.9U CN213342205U (en) | 2020-11-25 | 2020-11-25 | Digital maritime affairs VHF radio station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022763484.9U CN213342205U (en) | 2020-11-25 | 2020-11-25 | Digital maritime affairs VHF radio station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213342205U true CN213342205U (en) | 2021-06-01 |
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ID=76078675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022763484.9U Expired - Fee Related CN213342205U (en) | 2020-11-25 | 2020-11-25 | Digital maritime affairs VHF radio station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213342205U (en) |
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2020
- 2020-11-25 CN CN202022763484.9U patent/CN213342205U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210601 Termination date: 20211125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |