CN110289882A - A kind of radiofrequency signal either simplex transmission circuit - Google Patents
A kind of radiofrequency signal either simplex transmission circuit Download PDFInfo
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- CN110289882A CN110289882A CN201910687693.9A CN201910687693A CN110289882A CN 110289882 A CN110289882 A CN 110289882A CN 201910687693 A CN201910687693 A CN 201910687693A CN 110289882 A CN110289882 A CN 110289882A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 76
- 230000003321 amplification Effects 0.000 claims abstract description 77
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 77
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
Abstract
The present invention provides a kind of radiofrequency signal either simplex transmission circuits, it is characterized by comprising sequentially connected connector one, transmit-receive switch module one, through swtich module one, transmission power amplification module, through swtich module two, directional couple module, transmit-receive switch module two, bandpass filtering modules block and connectors two, emit power amplifier access to be formed；It further include drive module；Transmit-receive switch module two is also connect by receiving LNA amplification module with transmit-receive switch module one, so that connector two, bandpass filtering modules block, transmit-receive switch module two, reception LNA amplification module, transmit-receive switch module one and connector one form and receive power amplifier access；Through swtich module one is also directly connect with through swtich module two.The transmission circuit can not only realize RF signal power amplification transmitting or straight-through transmitting, but also can realize that radiofrequency signal low noise amplification receives, and meet a variety of use demands of user, structure is simple.
Description
Technical field
The present invention relates to technology for radio frequency fields, more specifically to a kind of radiofrequency signal either simplex transmission circuit.
Background technique
With making rapid progress for science and technology, mobile intelligent electronic communication device is universally present in public life；For example,
Advanced wireless communication technique is applied on vehicle, loads Vehicular communication system, it can be achieved that traffic advanced IT application and intelligence.
Vehicular communication system needs to realize the reception and transmitting of radiofrequency signal；The frequency range of radiofrequency signal is general are as follows: 400MHz~430MHz.
Device currently used for rf signal reception and transmitting is primarily present following deficiency:
(1) in existing apparatus, emission of radio frequency signals function and receive capabilities are not combined together usually and are divided into
Two parts are separately provided；Therefore such apparatus structure is complicated, and it is larger to occupy volume；
(2) at present emission of radio frequency signals and reception device be not designed for 400MHz~430MHz frequency range, if using
In 400MHz~430MHz frequency range, then will appear cannot effectively filter out clutter, situations such as signal interference is serious, be not suitable for
400MHz~430MHz frequency range.
Summary of the invention
To overcome shortcoming and deficiency of the prior art, the purpose of the present invention is to provide one kind can both realize radiofrequency signal
Power amplification transmitting or straight-through transmitting can realize that radiofrequency signal low noise amplification receives, meets a variety of use demands of user, knot again
The simple radiofrequency signal either simplex transmission circuit of structure.
In order to achieve the above object, the technical scheme is that: a kind of transmitting-receiving of radiofrequency signal either simplex
Circuit, it is characterised in that: including sequentially connected connector one, transmit-receive switch module one, through swtich module one, transmission power
Amplification module, through swtich module two, directional couple module, transmit-receive switch module two, bandpass filtering modules block and connector two, with
Form transmitting power amplifier access；It further include drive module；
The transmit-receive switch module two is also connect by receiving LNA amplification module with transmit-receive switch module one, so that connection
Device two, transmit-receive switch module two, receives LNA amplification module, transmit-receive switch module one and the formation of connector one at bandpass filtering modules block
Receive power amplifier access；
The through swtich module one is also directly connect with through swtich module two；Transmit-receive switch module one, through swtich
Module one, transmission power amplification module, through swtich module two, transmit-receive switch module two and receive LNA amplification module respectively with
Drive module connection.
Transmission circuit of the present invention has 2 two prevention at radio-frequency port of connector one and connector.Transmit-receive switch module one and receipts
Hair switch module two can be realized transmitting-receiving handoff functionality；Through swtich module one and through swtich module two can be realized it is straight-through,
Amplify handoff functionality；Transmission power amplification module can be realized signal power enlarging function；Directional couple module, which can be realized, penetrates
Frequency signal directional couple function；The signal of out-of-band frequency when bandpass filtering modules block can filter out transmitting and receive；Receive LNA amplification
Module can be realized the low noise amplification function of receiving signal.
When transmitting, connector one is used as delivery outlet as excitation mouth, connector two；Transmitting signal successively passes through transmit-receive switch
Module one, through swtich module one, transmission power amplification module, through swtich module two, directional couple module, transmit-receive switch mould
Block two and bandpass filtering modules block export after carrying out power amplification；Either transmitting signal successively passes through transmit-receive switch module one, straight
Logical switch module one, through swtich module two, directional couple module, transmit-receive switch module two and bandpass filtering modules block, without
Power amplification and directly export.When reception, connector two is as input port is received, and connector one is as reception delivery outlet；It receives
Signal successively passes through connector two, bandpass filtering modules block, transmit-receive switch module two, receives LNA amplification module, transmit-receive switch module
One and connector one realize receive.Therefore, transmission circuit of the present invention can both realize RF signal power amplification transmitting or straight-through hair
It penetrates, and can realize that radiofrequency signal low noise amplification receives, meet a variety of use demands of user.
Preferably, it is connected between the through swtich module one and transmission power amplification module by balun WT1；Emit function
It is connected between rate amplification module and through swtich module two by balun WT2；Through swtich module one and through swtich module two
Between connected by balun WT3；It is connected between transmit-receive switch module one and reception LNA amplification module by balun WT4.
Preferably, the drive module includes that transmit-receive switch drive module, through swtich drive module and logic control are driven
Dynamic model block；
The logic control drive module is amplified with transmit-receive switch module one, through swtich module one, transmission power respectively
Module is connected with LNA amplification module is received；Logic control drive module also respectively with transmit-receive switch drive module and through swtich
The input terminal of drive module connects；The output end of the transmit-receive switch drive module is connect with transmit-receive switch module two；It is described straight
The output end of logical switch drive module is connect with through swtich module two.
Preferably, the through swtich module one includes the through swtich chip and π connecting with logic control drive module
Type attenuator circuit；Through swtich chip is connect by π type attenuator circuit with transmission power amplification module；
The through swtich module two includes integrated switch chip one；Integrated switch chip one and through swtich drive module
Output end connection.
Preferably, the transmit-receive switch module one includes transmit-receive switch chip；Transmit-receive switch chip and logic control drive
Module connection；
The transmit-receive switch module two includes integrated switch chip two；Integrated switch chip two and transmit-receive switch drive module
Output end connection.
Preferably, the transmission power amplification module includes the identical power amplification branch of two line structures；Every road power is put
Big branch includes RF tube VQ1；Through swtich module one passes through the G of concatenated capacitor C15 and resistance R10 and RF tube VQ1
Pole connection；Logic control drive module is connect by concatenated resistance RP4 and resistance R4 with the pole G of RF tube VQ1；Resistance RP4
Pass through RC circuit ground in parallel with the junction of resistance R4；The pole G of RF tube VQ1 is connected by concatenated capacitor C7 and resistance R8
It is connected to the pole D of RF tube VQ1；The pole S of RF tube VQ1 is grounded；The pole D of RF tube VQ1 passes through inductance L22 and through swtich module
Two connections；The pole D of RF tube VQ1 also passes through inductance L2 and connect with supply voltage.It is synthesized using two-way power amplification branch come real
Existing power amplification, can effectively improve power gain.
Preferably, the directional couple module includes concatenated transmission balun WT5 and transmission balun WT6；Wherein, transmission bar
Human relations WT5 is connect with through swtich module two, and transmission balun WT6 is connect with transmit-receive switch module two.
It preferably, further include protective module；The directional couple module further includes for detecting determining for RF signal power
Coupling detection circuit；The input terminal for determining coupling detection circuit and protective module connects, and the output end of protective module and logic control drive
Module connection.
Preferably, the bandpass filtering modules block includes LC parallel filtering circuit and LC series filtering circuit.
Preferably, the reception LNA amplification module includes low noise chip；Logic control drive module passes through integrated switch
Chip three is connect with the VCC interface of low noise chip；The input terminal of low noise chip is connect with transmit-receive switch module two, output end
It is connect with transmit-receive switch module one.
Compared with prior art, the invention has the advantages that with the utility model has the advantages that
1, transmission circuit of the present invention can not only realize RF signal power amplification transmitting or straight-through transmitting, but also can realize that radio frequency is believed
Number low noise amplification receives, and meets a variety of use demands of user；Transmitting and reception shared interface, can simplify circuit structure, favorably
In diminution equipment overall volume；
2, transmission circuit of the present invention can be driven by logic control drive module, transmit-receive switch drive module and through swtich
Module realizes signal power amplification transmitting, the straight-through transmitting of signal, the switching of signal low noise amplification reception state, using simply just
It is prompt；
3, transmission circuit of the present invention has the advantages that high-gain, low noise；
4, transmission circuit of the present invention has defencive function, it can be achieved that temperature protection and vswr protection, further increase use
Safety and reliability.
Detailed description of the invention
Fig. 1 is the functional block diagram of radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 2 is the circuit of transmit-receive switch module one and through swtich module one in radiofrequency signal either simplex transmission circuit of the present invention
Schematic diagram；
Fig. 3 is the circuit diagram of transmission power amplification module in radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 4 is the circuit diagram of through swtich module two in radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 5 is the circuit diagram of directional couple module in radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 6 is transmit-receive switch module two in radiofrequency signal either simplex transmission circuit of the present invention, bandpass filtering modules block and reception LNA
The circuit diagram of amplification module；
Fig. 7 is the circuit diagram of logic control drive module in radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 8 is the circuit diagram of transmit-receive switch drive module in radiofrequency signal either simplex transmission circuit of the present invention；
Fig. 9 is the circuit diagram of through swtich drive module in radiofrequency signal either simplex transmission circuit of the present invention；
Figure 10 is the circuit diagram of protective module in radiofrequency signal either simplex transmission circuit of the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment with reference to the accompanying drawing.
Embodiment one
A kind of radiofrequency signal either simplex transmission circuit of the present embodiment, structure are as shown in Figures 1 to 9；Including sequentially connected
Connector one, transmit-receive switch module one, through swtich module one, transmission power amplification module, through swtich module two, orientation coupling
Block, transmit-receive switch module two, bandpass filtering modules block and connector two are molded, emits power amplifier access to be formed；Through swtich module
One also directly connect with through swtich module two；
Transmit-receive switch module two is also connect by receiving LNA amplification module with transmit-receive switch module one, so that connector two,
Bandpass filtering modules block, transmit-receive switch module two receive LNA amplification module, transmit-receive switch module one and the formation reception of connector one
Power amplifier access.
Transmission circuit further includes drive module；Drive module includes transmit-receive switch drive module, through swtich drive module
With logic control drive module.
Logic control drive module respectively with transmit-receive switch module one, through swtich module one, transmission power amplification module
With receive LNA amplification module connect, with realize logic control drive module to transmit-receive switch module one, through swtich module one,
Transmission power amplification module and reception LNA amplification module export unlike signal to realize function switch；Logic control drive module
It is also connect respectively with the input terminal of transmit-receive switch drive module and through swtich drive module, to realize logic control drive module
Control the output of transmit-receive switch drive module and through swtich drive module；The output end of transmit-receive switch drive module is opened with transmitting-receiving
Module two is closed to connect；The output end of through swtich drive module is connect with through swtich module two.
It is preferably connected by balun WT1 between through swtich module one and transmission power amplification module；Transmission power amplification
It is preferably connected by balun WT2 between module and through swtich module two；Through swtich module one and through swtich module two it
Between preferably connected by balun WT3；It is preferably connected by balun WT4 between transmit-receive switch module one and reception LNA amplification module.
In Fig. 2,3,4 and 6, WT1A and WT1B are the both ends for transmitting balun WT1, and WT2A and WT2B are the both ends for transmitting balun WT2, WT3A
It is the both ends for transmitting balun WT3 with WT3B, WT4A and WT4B are the both ends for transmitting balun WT4.
Transmission circuit of the present invention is particularly suitable for 400MHz~430MHz's suitable for the transmitting and reception of radiofrequency signal
Radiofrequency signal；With 2 two prevention at radio-frequency port of connector one and connector.Two energy of transmit-receive switch module one and transmit-receive switch module
It is enough to realize transmitting-receiving handoff functionality；Through swtich module one and through swtich module two can be realized straight-through, amplification handoff functionality；Hair
Penetrating power amplifier module can be realized signal power enlarging function；Directional couple module can be realized signal power detection function；
The signal of out-of-band frequency when bandpass filtering modules block can filter out transmitting and receive；Receiving LNA amplification module can be realized reception letter
Number low noise amplification function.
When transmitting, connector one is used as delivery outlet as excitation mouth, connector two；Transmitting signal successively passes through transmit-receive switch
Module one, through swtich module one, transmission power amplification module, through swtich module two, directional couple module, transmit-receive switch mould
Block two and bandpass filtering modules block export after carrying out power amplification；Either transmitting signal successively passes through transmit-receive switch module one, straight
Logical switch module one, through swtich module two, directional couple module, transmit-receive switch module two and bandpass filtering modules block, without
Power amplification and directly export.When reception, connector two is as input port is received, and connector one is as reception delivery outlet；It receives
Signal successively passes through connector two, bandpass filtering modules block, transmit-receive switch module two, receives LNA amplification module, transmit-receive switch module
One and connector one realize receive.Therefore, transmission circuit of the present invention can both realize RF signal power amplification transmitting or straight-through hair
It penetrates, and can realize that radiofrequency signal low noise amplification receives, meet a variety of use demands of user.
As shown in Fig. 2, transmit-receive switch module one includes the transmit-receive switch chip connecting with logic control drive module.It is straight-through
Switch module one includes the through swtich chip connecting with logic control drive module and π type attenuator circuit；Through swtich chip
It is connect by π type attenuator circuit with transmission power amplification module.The core of model MASWSS0181 can be used in transmit-receive switch chip
Piece.The chip of model MASWSS0181 can be used in through swtich chip.
As shown in figure 3, transmission power amplification module includes the identical power amplification branch of two line structures；Every road power amplification
Branch includes RF tube VQ1；Through swtich module one passes through the pole G of concatenated capacitor C15 and resistance R10 and RF tube VQ1
Connection；Logic control drive module is connect by concatenated resistance RP4 and resistance R4 with the pole G of RF tube VQ1；Resistance RP4 and
The junction of resistance R4 passes through RC circuit ground in parallel；The pole G of RF tube VQ1 is connected by concatenated capacitor C7 with resistance R8
To the pole D of RF tube VQ1；The pole S of RF tube VQ1 is grounded；The pole D of RF tube VQ1 passes through inductance L22 and through swtich module two
Connection；The pole D of RF tube VQ1 also passes through inductance L2 and connect with supply voltage 12V.Supply voltage 12V is provided by power supply.
As shown in figure 4, through swtich module two includes integrated switch chip one；Integrated switch chip one and through swtich drive
The output end of dynamic model block connects.The chip of model MASW-000936 (QFN) can be used in integrated switch chip one.
As shown in figure 5, directional couple module includes concatenated transmission balun WT5 and transmission balun WT6；Wherein, transmission bar
Human relations WT5 is connect with through swtich module two, and transmission balun WT6 is connect with transmit-receive switch module two.
As shown in fig. 6, transmit-receive switch module two includes integrated switch chip two；Integrated switch chip two and transmit-receive switch drive
The output end of dynamic model block connects.Bandpass filtering modules block includes LC parallel filtering circuit and LC series filtering circuit.Integrated switch core
The chip of model MASW-000936 (QFN) can be used in piece two.
Receiving LNA amplification module includes low noise chip；Logic control drive module by integrated switch chip three with it is low
It makes an uproar and puts the VCC interface connection of chip；The input terminal of low noise chip is connect with transmit-receive switch module two, output end and transmit-receive switch
Module one connects.Existing LNA chip can be used in low noise chip.Integrated switch chip three can be used model TQP3M9009's
Chip.
The control principle of the present embodiment is: transmit-receive switch drive module, through swtich drive module and logic control driving
The circuit theory of module is as shown in Figs. 7-9.The port PA-EN, the T/ of logic control drive module are manually set according to work requirements
The port R and the port ATT15, remaining port signal automatically generate.Wherein, the port VP be for protective module setting protection signal it is defeated
Entrance according to the working condition of transmitting-receiving subassembly such as excess temperature or crosses standing wave come automatically generating, the port status by component work
State determines；In the case where not protecting, the port VP is automatically made low level.The port ATT15 of logic control drive module
And ATT15 ' port controlling through swtich chip, ATT15 ' the port controlling through swtich of logic control drive module drive mould
Block, through swtich drive module control integrated switch chip one, and the VG port controlling transmission power of logic control drive module is put
Big module realizes that radiofrequency signal is led directly to or the two states of power amplification switch.
The port T/R of logic control drive module and T/R ' port controlling transmit-receive switch chip, logic control drive module
T/R ' port controlling transmit-receive switch drive module, transmit-receive switch drive module controls integrated switch chip two, realizes radio frequency letter
The switching of number transmission-receiving function.
Embodiment two
A kind of radiofrequency signal either simplex transmission circuit of the present embodiment, the difference with embodiment one are: in the present embodiment, orientation
Coupling module further includes determining coupling detection circuit for detect RF signal power.As shown in figure 5, determining coupling detection circuit includes electricity
Hinder R14, R15, R20, R22, R24 and capacitor C34, CP9 and resistance R31, R32, R34, R37, R38, capacitor CP10 and pressure stabilizing
Diode VD6.
Transmission circuit further includes protective module, and the input terminal for determining coupling detection circuit and protective module connects, protective module
Output end is connect with logic control drive module.In the present embodiment, protective module is temperature protection and vswr protection module, is such as schemed
Shown in 10.
Integrated temperature switch chip in protective module has the function of temperature sensor, and model MAX6510CAUT can be used
Integrated temperature switch chip, in conjunction with determine coupling detection circuit acquisition detection signal, protective module generate protection signal be sent to
In logic control drive module, transmission circuit is made to have the function of temperature protection and vswr protection, in high-temperature condition and short circuit can be opened
In the case of realize protection.In the present embodiment, the protection signal VP that protective module generates is emitted in logic control drive module, such as
Shown in Fig. 7.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of radiofrequency signal either simplex transmission circuit, it is characterised in that: including sequentially connected connector one, transmit-receive switch module
One, through swtich module one, transmission power amplification module, through swtich module two, directional couple module, transmit-receive switch module
Two, bandpass filtering modules block and connector two emit power amplifier access to be formed；It further include drive module；
The transmit-receive switch module two is also connect by receiving LNA amplification module with transmit-receive switch module one, so that connector two,
Bandpass filtering modules block, transmit-receive switch module two receive LNA amplification module, transmit-receive switch module one and the formation reception of connector one
Power amplifier access；
The through swtich module one is also directly connect with through swtich module two；Transmit-receive switch module one, through swtich module
One, transmission power amplification module, through swtich module two, transmit-receive switch module two and receive LNA amplification module respectively with driving
Module connection.
2. radiofrequency signal either simplex transmission circuit according to claim 1, it is characterised in that: the through swtich module one with
It is connected between transmission power amplification module by balun WT1；Pass through between transmission power amplification module and through swtich module two
Balun WT2 connection；It is connected between through swtich module one and through swtich module two by balun WT3；Transmit-receive switch module one
It is connect between LNA amplification module by balun WT4 with receiving.
3. radiofrequency signal either simplex transmission circuit according to claim 1, it is characterised in that: the drive module includes transmitting-receiving
Switch drive module, through swtich drive module and logic control drive module；
The logic control drive module respectively with transmit-receive switch module one, through swtich module one, transmission power amplification module
It is connected with LNA amplification module is received；Logic control drive module also drives with transmit-receive switch drive module and through swtich respectively
The input terminal of module connects；The output end of the transmit-receive switch drive module is connect with transmit-receive switch module two；Described lead directly to is opened
The output end for closing drive module is connect with through swtich module two.
4. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the through swtich module one is wrapped
Include the through swtich chip connecting with logic control drive module and π type attenuator circuit；Through swtich chip passes through π type decaying electricity
Road is connect with transmission power amplification module；
The through swtich module two includes integrated switch chip one；Integrated switch chip one is defeated with through swtich drive module
Outlet connection.
5. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the transmit-receive switch module one is wrapped
Include transmit-receive switch chip；Transmit-receive switch chip is connect with logic control drive module；
The transmit-receive switch module two includes integrated switch chip two；Integrated switch chip two is defeated with transmit-receive switch drive module
Outlet connection.
6. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the transmission power amplification module
Including the identical power amplification branch of two line structures；Every road power amplification branch includes RF tube VQ1；Through swtich module one
It is connect by concatenated capacitor C15 and resistance R10 with the pole G of RF tube VQ1；Logic control drive module passes through concatenated resistance
RP4 and resistance R4 is connect with the pole G of RF tube VQ1；The junction of resistance RP4 and resistance R4 pass through RC circuit ground in parallel；
The pole G of RF tube VQ1 is connected to the pole D of RF tube VQ1 by concatenated capacitor C7 and resistance R8；The pole S of RF tube VQ1 connects
Ground；The pole D of RF tube VQ1 is connect by inductance L22 with through swtich module two；The pole D of RF tube VQ1 also pass through inductance L2 with
Supply voltage connection.
7. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the directional couple module includes
Concatenated transmission balun WT5 and transmission balun WT6；Wherein, transmission balun WT5 is connect with through swtich module two, transmits balun
WT6 is connect with transmit-receive switch module two.
8. radiofrequency signal either simplex transmission circuit according to claim 7, it is characterised in that: further include protective module；It is described
Directional couple module further includes determining coupling detection circuit for detect RF signal power；Determine coupling detection circuit and protective module
Input terminal connection, the output end of protective module are connect with logic control drive module.
9. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the bandpass filtering modules block includes
LC parallel filtering circuit and LC series filtering circuit.
10. radiofrequency signal either simplex transmission circuit according to claim 3, it is characterised in that: the reception LNA amplification module
Including low noise chip；Logic control drive module is connect by integrated switch chip three with the VCC interface of low noise chip；It is low
It makes an uproar and puts the input terminal of chip and connect with transmit-receive switch module two, output end is connect with transmit-receive switch module one.
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| CN201910687693.9A CN110289882A (en) | 2019-07-29 | 2019-07-29 | A kind of radiofrequency signal either simplex transmission circuit |
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| CN201910687693.9A CN110289882A (en) | 2019-07-29 | 2019-07-29 | A kind of radiofrequency signal either simplex transmission circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691277A (en) * | 2021-09-26 | 2021-11-23 | 广东宽普科技有限公司 | High-frequency short-wave high-suppression communication circuit |
| CN113872634A (en) * | 2021-10-28 | 2021-12-31 | 广东宽普科技有限公司 | High-efficient stable communication circuit of VHF signal |
| CN113922834A (en) * | 2021-09-28 | 2022-01-11 | 广东宽普科技有限公司 | High-efficient heat dissipation high frequency signal receiving and dispatching subassembly |
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| CN113872634A (en) * | 2021-10-28 | 2021-12-31 | 广东宽普科技有限公司 | High-efficient stable communication circuit of VHF signal |
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