CN209184589U - A kind of low-cost no line number words Transmission system emitter - Google Patents

Abstract

The utility model discloses the low-cost no line numbers of the one kind in New Technology Of Shortwave Communication field to talk about Transmission system emitter, including data-interface, audio collection module, antenna, phase-locked loop frequency synthesizer, matched filtering module and DGFET amplification module, the data-interface is electrically connected to the output end of audio-frequency amplifier, the output end of the audio-frequency amplifier is electrically connected with the input terminal of phase-locked loop frequency synthesizer, the data-interface is electrically connected to the input terminal of level adjustment module, the phase-locked loop frequency synthesizer and the output end of level adjustment module are electrically connected to the input terminal of DGFET amplification module, the output end of the DGFET amplification module is electrically connected to the input terminal of matched filtering module, the output end electrically connected antenna of the matched filtering module, increase transmission data function, it is technically simple, it is low in cost , conventional analog communication equipment is improved slightly, data communication can be realized.

Description

A kind of low-cost no line number words Transmission system emitter

Technical field

The utility model relates to New Technology Of Shortwave Communication field, specially a kind of low-cost no line number words Transmission system hair Injection device.

Background technique

In recent years, electronic technology is grown rapidly, and is promoted the update of New Technology Of Shortwave Communication and equipment, is formd the modern times Short wave communication new technology, New System.Software and radio technique makes short wave communication have more open structure and flexible property Energy.Short wave communication become information-intensive society important technology supporting method, be widely used in telegram, phone, low speed facsimile and Broadcast etc..The short wave communication main problem to be solved is to overcome stability poor larger with noise etc., new technology it is intrinsic its Superiority,

However, technology is complicated, and it is at high cost, it can not be synchronized during voice transfer and data are transmitted.This reality With novel by being improved slightly traditional analog voice short wave communication equipment, it is made to also add transmission data function, technology Simply, cost is relatively low.

Utility model content

The purpose of this utility model is to provide a kind of by being improved slightly traditional analog voice short wave communication equipment, It is set to also add transmission data function, technically simple, low-cost no line number talks about Transmission system emitter, on solving State the problem of proposing in background technique.

To achieve the above object, the utility model provides the following technical solutions: a kind of low-cost no line number words transmission System transmitting unit, including data-interface, audio collection module, antenna, phase-locked loop frequency synthesizer, matched filtering module and DGFET amplification module, the data-interface are electrically connected to the output end of audio-frequency amplifier, the output end of the audio-frequency amplifier with The input terminal of phase-locked loop frequency synthesizer is electrically connected, and the data-interface is electrically connected to the input terminal of level adjustment module, described Phase-locked loop frequency synthesizer and the output end of level adjustment module are electrically connected to the input terminal of DGFET amplification module, described The output end of DGFET amplification module is electrically connected to the input terminal of matched filtering module, the output end electricity of the matched filtering module Connect antenna.

Preferably, the phase-locked loop frequency synthesizer includes voltage controlled oscillator, loop low pass filter, phase discriminator, bimodulus The output end of prescalar and high stability crystal oscillator, the audio-frequency amplifier is electrically connected to the input of voltage controlled oscillator End, the output end of the input terminal electrical connection dual-modulus prescaler of the high stability crystal oscillator, the high stability are brilliant Oscillation body device output end electrical connection phase discriminator input terminal, the output end linkloop low-pass filter of the phase discriminator it is defeated Enter end, the output end of the loop low pass filter is electrically connected the input terminal of voltage controlled oscillator, the dual-modulus prescaler The output end of input terminal electrical connection voltage controlled oscillator.

Preferably, the audio-frequency amplifier is applied on voltage controlled oscillator by FM modulation module, and the level adjusts mould Block is applied on DGFET amplification module by AM modulation module.

Preferably, the matched filtering module uses lc circuit.

Preferably, the level adjustment module selects level shifting circuit MAX232.

Preferably, the audio-frequency amplifier selects audio power amplifier circuit LM386.

Compared with prior art, the utility model has the beneficial effects that the utility model emitter realizes antenna frequency The wireless transmission of section voice-and-data, the data and audio for needing to transmit by data-interface and audio collection module acquisition are believed Number, audio-frequency amplifier is applied on the voltage controlled oscillator in phase-locked loop frequency synthesizer by FM modulation module, the level tune Mould preparation block is applied on DGFET amplification module by AM modulation module, is used mode of frequency regulation to voice, is modulated data using tune Width mode realizes frequency dividing ratio control and phase demodulation by phase-locked loop frequency synthesizer, and using DGFET amplification module, radio frequency is used The bis- coral field-effect tube of 3SK122, not only may be implemented the function of amplification and amplitude modulation, but also meet the requirement of carrier signal source isolation, then By after frequency modulation voice and modulated data by being emitted by antenna, increasing biography after matched filtering resume module Transmission of data function, it is technically simple, it is low in cost, conventional analog communication equipment is improved slightly, data communication can be realized.

Detailed description of the invention

In order to illustrate more clearly of the technical solution of the utility model embodiment, make required for being described below to embodiment Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings Other attached drawings.

FIG. 1 is a schematic structural view of the utility model.

In attached drawing, parts list represented by the reference numerals are as follows:

1- data-interface, 2- audio collection module, 3- antenna, 4- phase-locked loop frequency synthesizer, 5- matched filtering module, 6- DGFET amplification module, 7- level adjust module, 8- voltage controlled oscillator, 9- loop low pass filter, 10- phase discriminator, 11- bimodulus Prescalar, 12- high stability crystal oscillator, 13- audio-frequency amplifier.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts All other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, the utility model provides a kind of technical solution: a kind of low-cost no line number words Transmission system hair Injection device, including data-interface 1, audio collection module 2, antenna 3, phase-locked loop frequency synthesizer 4,5 and of matched filtering module DGFET amplification module 6, the data-interface 1 are electrically connected to the output end of audio-frequency amplifier 13, the audio-frequency amplifier 13 it is defeated Outlet is electrically connected with the input terminal of phase-locked loop frequency synthesizer 4, and the data-interface 1 is electrically connected to the defeated of level adjustment module 7 Enter end, the output end that the phase-locked loop frequency synthesizer 4 and level adjust module 7 is electrically connected to the defeated of DGFET amplification module 6 Enter end, the output end of the DGFET amplification module 6 is electrically connected to the input terminal of matched filtering module 5, the matched filtering module 5 output end electrically connected antenna 3, the phase-locked loop frequency synthesizer 4 include voltage controlled oscillator 8, loop low pass filter 9, mirror Phase device 10, dual-modulus prescaler 11 and high stability crystal oscillator 12, wherein voltage controlled oscillator 8, loop low pass filter 9, phase discriminator 10, dual-modulus prescaler 11 and high stability crystal oscillator 12 are built-in with Voltage-Controlled oscillation circuit, loop low pass Filter circuit, phase discriminator, bimodulus prescale unit circuit and high stability crystal oscillating circuit are existing known circuits, described The output end of audio-frequency amplifier 13 is electrically connected to the input terminal of voltage controlled oscillator 8, the high stability crystal oscillator 12 it is defeated Enter the output end of end electrical connection dual-modulus prescaler 11, the output end of the high stability crystal oscillator 12 is electrically connected phase demodulation The input terminal of device 10, the input terminal of the output end linkloop low-pass filter 9 of the phase discriminator 10, the loop low pass wave The input terminal of the output end electrical connection voltage controlled oscillator 8 of device 9, the input terminal of the dual-modulus prescaler 11 are electrically connected voltage-controlled vibration Swing the output end of device 8.

The audio-frequency amplifier 13 is applied on voltage controlled oscillator 8 by FM modulation module, and the level adjustment module 7 is logical It crosses AM modulation module to be applied on DGFET amplification module 6, mode of frequency regulation is used to voice, amplitude modulation mode is used to data modulation, The matched filtering module 5 uses lc circuit, and the level adjustment module 7 selects level shifting circuit MAX232, the audio Amplifier 13 selects audio power amplifier circuit LM386, has the characteristics that low quiescent dissipation, wide supply voltage, wideband, small in size.

Data-interface 1 and audio collection module 2, for acquiring the data and audio signal that need to transmit；

Antenna 3, for will on emitter without line number words transmission guided wave, be transformed into unbounded medium (usually from By space) in propagate electromagnetic wave；

Phase-locked loop frequency synthesizer 4 is exported the phase and frequency of input signal and voltage controlled oscillator 8 by phase discriminator 10 The dual-modulus prescaler 11 of end connection is compared, and generates the error voltage Vd (t) for corresponding to two signal phase differences, error electricity Pressure is added to the control input of voltage controlled oscillator 8 after filtering by loop low pass filter 9, effect is to reduce voltage controlled oscillator 8 The frequency error of output and input signal, when the frequency of voltage controlled oscillator 8 is sufficiently close to the frequency of input signal, phaselocked loop Closed loop characteristic force voltage controlled oscillator 8 be locked in the frequency of input signal, other than limited phase error, voltage controlled oscillator 8 frequency is equal to the frequency of input signal, and can automatically track the variation of input frequency, thus obtains phase-locked loop frequency synthesis The output frequency of device is fo=Nfr, and reference frequency fr is obtained after fixed reference divides by high stability crystal oscillator 12 , if crystal oscillation frequency is 3.2MHz, fixed frequency coefficient is 128, then reference frequency fr=3.2MHz/128=25kHz, Channel numerical control program divider parameter is provided by single-chip microcontroller, changes frequency division coefficient N, required different frequency can be obtained.

The characteristics of frequency-modulated wave is that output frequency changes with the variation of modulated signal amplitude, by voltage controlled oscillator 8 Modulated signal is added in input, the output signal of voltage controlled oscillator 8 can be made to become the tune for changing with modulated signal amplitude and changing Frequency wave signal can obtain purer carrier signal source so that phaselocked loop be made to have excellent properties；

DGFET amplification module 6, radio frequency are used 3SK122 dual gate FET, are modulated using AM, and traditional method is to borrow Multiplier carries out small signal modulation, and rear class is amplified again, alternatively, amplitude modulation is introduced by supply transformer in final stage big amplified signal level, These methods can make circuit complicated, and dual gate FET is gathered around there are two grid, one input carrier signal, secondly input The function of amplification and amplitude modulation both may be implemented in modulated signal, moreover, dual gate FET port isolation performance is very good, meets Therefore the requirement of carrier signal source isolation reaches three functions using a DGFET amplification module 6, circuit is very succinct, mentions High product cost；

Matched filtering module 5, be in order to inhibit spuious, after DGFET amplification module 6 plus filter, in order to 3, antenna Match, to obtain maximum antenna power output, match circuit is added between DGFET amplification module 6 and antenna, matching and filtering are equal It can be realized with lc circuit, i.e., lc circuit realizes filtering, and realizes matching；

Audio-frequency amplifier 13 uses special chip MC3361.

The emitter realizes the wireless transmission of antenna band voice-and-data, passes through data-interface 1 and audio collection mould The data and audio signal that the acquisition of block 2 needs to transmit, audio-frequency amplifier 13 are applied to phase-locked loop frequency by FM modulation module and close On the voltage controlled oscillator 8 grown up to be a useful person in 4, the level adjustment module 7 is applied on DGFET amplification module 6 by AM modulation module, Mode of frequency regulation is used to voice, amplitude modulation mode is used to data modulation, frequency dividing ratio control is realized by phase-locked loop frequency synthesizer 4 And phase demodulation, using DGFET amplification module 6, radio frequency uses the bis- coral field-effect tube of 3SK122, and the function of amplification and amplitude modulation both may be implemented Can, but meet carrier signal source isolation requirement, then by after frequency modulation voice and modulated data pass through matched filtering mould After the processing of block 5, is emitted by antenna 3, solve the problems, such as that short wave communication stability is poor larger with noise, it is at low cost It is honest and clean, conventional analog communication equipment is improved slightly, data communication can be realized.

In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples In can be combined in any suitable manner.

The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory The content of bright book can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably The principles of the present invention and practical application are explained, so that skilled artisan be enable to better understand and utilize this Utility model.The utility model is limited only by the claims and their full scope and equivalents.

Claims (6)

1. a kind of low-cost no line number talks about Transmission system emitter, including data-interface (1), audio collection module (2), Antenna (3), phase-locked loop frequency synthesizer (4), matched filtering module (5) and DGFET amplification module (6), it is characterised in that: described Data-interface (1) is electrically connected to the output end of audio-frequency amplifier (13), the output end and phaselocked loop of the audio-frequency amplifier (13) The input terminal of frequency synthesizer (4) is electrically connected, and the data-interface (1) is electrically connected to the input terminal of level adjustment module (7), institute The output end for stating phase-locked loop frequency synthesizer (4) and level adjustment module (7) is electrically connected to the defeated of DGFET amplification module (6) Enter end, the output end of the DGFET amplification module (6) is electrically connected to the input terminal of matched filtering module (5), the matched filtering The output end electrically connected antenna (3) of module (5).

2. the low-cost no line number of one kind according to claim 1 talks about Transmission system emitter, it is characterised in that: institute Stating phase-locked loop frequency synthesizer (4) includes that voltage controlled oscillator (8), loop low pass filter (9), phase discriminator (10), bimodulus are preposition The output end of frequency divider (11) and high stability crystal oscillator (12), the audio-frequency amplifier (13) is electrically connected to voltage controlled oscillation The input terminal of the input terminal of device (8), the high stability crystal oscillator (12) is electrically connected the defeated of dual-modulus prescaler (11) Outlet, the input terminal of output end electrical connection phase discriminator (10) of the high stability crystal oscillator (12), the phase discriminator (10) input terminal of output end linkloop low-pass filter (9), the output end electrical connection of the loop low pass filter (9) The input terminal of voltage controlled oscillator (8), the output of input terminal electrical connection voltage controlled oscillator (8) of the dual-modulus prescaler (11) End.

3. the low-cost no line number of one kind according to claim 2 talks about Transmission system emitter, it is characterised in that: institute It states audio-frequency amplifier (13) to be applied on voltage controlled oscillator (8) by FM modulation module, level adjustment module (7) passes through AM Modulation module is applied on DGFET amplification module (6).

4. the low-cost no line number of one kind according to claim 1 talks about Transmission system emitter, it is characterised in that: institute Matched filtering module (5) are stated using lc circuit.

5. the low-cost no line number of one kind according to claim 1 talks about Transmission system emitter, it is characterised in that: institute It states level adjustment module (7) and selects level shifting circuit MAX232.

6. the low-cost no line number of one kind according to claim 1 talks about Transmission system emitter, it is characterised in that: institute It states audio-frequency amplifier (13) and selects audio power amplifier circuit LM386.