CN206725750U - A kind of VHF ionospheric irregularities detection system transmit-receive switch - Google Patents
A kind of VHF ionospheric irregularities detection system transmit-receive switch Download PDFInfo
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- CN206725750U CN206725750U CN201720227174.0U CN201720227174U CN206725750U CN 206725750 U CN206725750 U CN 206725750U CN 201720227174 U CN201720227174 U CN 201720227174U CN 206725750 U CN206725750 U CN 206725750U
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Abstract
It the utility model is related to electronic communication, and in particular to a kind of VHF ionospheric irregularities detection system transmit-receive switch, including transmitting terminal, receiving terminal, antenna end and power supply；Including the drive circuit, low pass filter and topological structure being connected with the power supply；The drive circuit is core devices using diode PIN, and diode PIN is driven using metal-oxide-semiconductor；The low pass filter uses second order LC low pass filters；The topological structure is to form single-pole double-throw switch (SPDT) using string and topological structure to receiving terminal in transmitting terminal to antenna end and antenna end.The transmit-receive switch meets that single antenna realizes the requirement of transmitting-receiving switching, and insertion loss is small and isolation is higher, and complex degree of structure is moderate.Bear that power is big, conversion speed is fast, isolation is high.Ionospheric irregularities survey meter can be made really to possess portable feature.
Description
Technical field
The utility model belongs to technical field of electronic communication, more particularly to a kind of VHF ionospheric irregularities detection system
Transmit-receive switch.
Background technology
VHF ionospheric irregularities detection systems are a kind of radar systems for being operated in ultrashort wave frequency band, according to ionosphere
The principle that heterogeneous body is reflected the radio signal of ultrashort wave shortwave frequency range, it can be carried out to ionospheric irregularities
Real-time monitored simultaneously obtains its correlative Neo-Confucianism parameter.Current detection mode is more by the way of dual-mode antenna separation, it is desirable to visits
Survey levelling of the land is open and floor space is big, meanwhile, there is damage to receive coupled to the too strong near-field emissions signal of reception antenna
The possibility of passage.
Utility model content
The purpose of this utility model is to provide a kind of transceiving integrated VHF ionospheric irregularities detection system of single antenna
System transmit-receive switch, has and bears the characteristics of power is big, conversion speed is fast, isolation is high, portable.
To achieve these goals, the technical solution adopted in the utility model is：A kind of VHF ionospheric irregularities detection
System transmit-receive switch, including transmitting terminal, receiving terminal, antenna end and power supply；Including be connected with the power supply drive circuit, low pass
Wave filter and topological structure；The drive circuit is core devices using diode PIN, and diode is driven using metal-oxide-semiconductor
PIN；The low pass filter uses second order LC low pass filters；The topological structure is in transmitting terminal to antenna end and antenna end
Single-pole double-throw switch (SPDT) is formed using string and topological structure to receiving terminal.
In above-mentioned VHF ionospheric irregularities detection system transmit-receive switches, the circuit of the driving diode PIN
Grid including control signal port connection metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 grounded drains, metal-oxide-semiconductor Q3 sources
Pole is connected with resistance R3, and resistance R3 series resistances R2 composition potential-divider networks are followed by positive source V+, metal-oxide-semiconductor Q1 source electrodes and electricity
Resistance R4 is connected, and resistance R4 series resistances R5 composition potential-divider networks are followed by power cathode V-；Resistance R1, resistance R2 form three poles
Pipe Q2 biasing circuits, resistance R2 one end are connected with positive source V+, and the other end is connected with resistance R3, triode Q2 base stages, electricity
Hinder R1 mono- and terminate positive source V+, another to terminate triode Q2 emitter stages, triode Q2 colelctor electrodes are just extremely short with diode PIN
Connect；Resistance R5, resistance R6 form triode Q4 biasing circuits, and resistance R5 one end is connected with power cathode V-, the other end and resistance
R4, triode Q4 base stages are connected, and resistance R6 mono- terminates power cathode V-, another termination triode Q4 emitter stages, triode Q4 collection
Electrode and diode PIN positive pole short circuits.
In above-mentioned VHF ionospheric irregularities detection system transmit-receive switches, the second order LC low pass filters use
The LC low pass filters of 11uH inductance and 22nF electric capacity composition, two terminal impedances take 50 ohm.
It is described in transmitting terminal to antenna end and day in above-mentioned VHF ionospheric irregularities detection system transmit-receive switches
Line end forms single-pole double-throw switch (SPDT) using string and topological structure to receiving terminal and passes through capacitance C3 and two including the antenna end
Pole pipe PIN2, diode PIN3 positive poles are connected；High frequency choke coil L5 one end is grounded, the other end and capacitance C3, diode
PIN2 positive poles, diode PIN3 positive poles are connected；Electric capacity C6 one end is connected with port Vbias1, other end ground connection；High frequency choke coil
L1 one end is connected with port Vbias1, another terminating diode PIN1 negative poles, diode PIN1 plus earths；Electric capacity C7 one end with
Port Vbias2 is connected, other end ground connection；High frequency choke coil L2 one end is connected with port Vbias2, another terminating diode
PIN2 negative poles；Electric capacity C8 one end is connected with port Vbias3, other end ground connection；High frequency choke coil L3 one end and port Vbias3 phases
Even, another terminating diode PIN3 negative poles；Electric capacity C9 one end is connected with port Vbias4, other end ground connection；High frequency choke coil L4
One end is connected with port Vbias4, another terminating diode PIN4 negative poles；Diode PIN4 plus earths；Capacitance C1, every
Straight electric capacity C2 and diode PIN2 negative pole phases side；Capacitance C1 one end connects transmitting terminal, another terminating diode PIN1 negative poles；
The terminating diode PIN1 negative poles of capacitance C2 mono-, another terminating diode PIN2 negative poles；Capacitance C5 mono- terminates receiving terminal,
The other end is connected with diode PIN4 negative poles；The terminating diode PIN4 negative poles of capacitance C4 mono-, the other end and diode PIN3
Negative pole is connected.
The beneficial effects of the utility model are：
(1) piece antenna of ionospheric irregularities detection system transmit-receive sharing can be made.
(2) ionospheric irregularities detection system transmit-receive switch bears that power is big, conversion speed is fast, isolation is high.
(3) ionospheric irregularities survey meter can be made really to possess portable feature.
Brief description of the drawings
Fig. 1 is the utility model one embodiment drive circuit figure；
Fig. 2 is the utility model one embodiment low-pass filter circuit figure；
Fig. 3 is the utility model one embodiment switch circuit topology structure chart.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
The example of the embodiment is shown in the drawings, wherein same or similar label represents identical or class from beginning to end
As element or with same or like function element.The embodiments described below with reference to the accompanying drawings are exemplary, only
For explaining the utility model, and can not be construed to limitation of the present utility model.
Following disclosure provides many different embodiments or example is used for realizing different structure of the present utility model.For
Simplify disclosure of the present utility model, hereinafter the part and setting of specific examples are described.They are only example, and
And purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals and/or word
It is female.This repetition is for purposes of simplicity and clarity, between itself not indicating discussed various embodiments and/or setting
Relation.In addition, the utility model provides the example of various specific techniques and material, but those of ordinary skill in the art can
To recognize the use of the applicability of other techniques and/or other materials.In addition, fisrt feature described below is special second
Levy it " on " structure can include the first and second features and be formed as the embodiment that directly contacts, other spy can also be included
The embodiment that sign is formed between the first and second features, such first and second feature may not be direct contact.
, it is necessary to which explanation, unless otherwise prescribed and is limited, term " connected " " connection " should in description of the present utility model
It is interpreted broadly, for example, it may be mechanical connection or electrical connection or the connection of two element internals, can be direct
It is connected, can also be indirectly connected by intermediary, can be according to specific feelings for those of ordinary skill in the related art
Condition understands the concrete meaning of above-mentioned term.
The technical scheme of the present embodiment is as follows, a kind of VHF ionospheric irregularities detection system transmit-receive switch, including transmitting
End, receiving terminal, antenna end and power supply；Including the drive circuit, low pass filter and topological structure being connected with the power supply；Institute
It is core devices that drive circuit, which is stated, using diode PIN, and diode PIN is driven using metal-oxide-semiconductor；The low pass filter uses two
Rank LC low pass filters；The topological structure is using string and topological structure in transmitting terminal to antenna end and antenna end to receiving terminal
Form single-pole double-throw switch (SPDT).
Further, the circuit of the driving diode PIN includes control signal port connection metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3
Grid, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 grounded drains, metal-oxide-semiconductor Q3 source electrodes are connected with resistance R3, resistance R3 series resistances R2 composition partial pressures
Network is followed by with resistance R4 being connected in positive source V+, metal-oxide-semiconductor Q1 source electrodes, after resistance R4 series resistances R5 composition potential-divider networks
It is connected to power cathode V-；Resistance R1, resistance R2 form triode Q2 biasing circuits, and resistance R2 one end is connected with positive source V+,
The other end is connected with resistance R3, triode Q2 base stages, and resistance R1 mono- terminates positive source V+, another termination triode Q2 transmittings
Pole, triode Q2 colelctor electrodes and diode PIN positive pole short circuits；Resistance R5, resistance R6 form triode Q4 biasing circuits, resistance R5
One end is connected with power cathode V-, and the other end is connected with resistance R4, triode Q4 base stages, and resistance R6 mono- terminates power cathode V-,
Another termination triode Q4 emitter stages, triode Q4 colelctor electrodes and diode PIN positive pole short circuits.
Further, the LC low pass filters that the second order LC low pass filters are formed using 11uH inductance and 22nF electric capacity,
Two terminal impedances take 50 ohm.
Further, it is described that hilted broadsword pair is formed using string and topological structure with antenna end to receiving terminal in transmitting terminal to antenna end
Throw switch is connected including the antenna end by capacitance C3 with diode PIN2, diode PIN3 positive poles；High frequency choke coil
L5 one end is grounded, and the other end is connected with capacitance C3, diode PIN2 positive poles, diode PIN3 positive poles；Electric capacity C6 one end with
Port Vbias1 is connected, other end ground connection；High frequency choke coil L1 one end is connected with port Vbias1, another terminating diode PIN1
Negative pole, diode PIN1 plus earths；Electric capacity C7 one end is connected with port Vbias2, other end ground connection；High frequency choke coil L2 mono-
End is connected with port Vbias2, another terminating diode PIN2 negative poles；Electric capacity C8 one end is connected with port Vbias3, another termination
Ground；High frequency choke coil L3 one end is connected with port Vbias3, another terminating diode PIN3 negative poles；Electric capacity C9 one end and port
Vbias4 is connected, other end ground connection；High frequency choke coil L4 one end is connected with port Vbias4, and another terminating diode PIN4 is born
Pole；Diode PIN4 plus earths；Capacitance C1, capacitance C2 and diode PIN2 negative pole phases side；Capacitance C1 mono-
Terminate transmitting terminal, another terminating diode PIN1 negative poles；The terminating diode PIN1 negative poles of capacitance C2 mono-, two poles of another termination
Pipe PIN2 negative poles；Capacitance C5 mono- terminates receiving terminal, and the other end is connected with diode PIN4 negative poles；Capacitance C4 one end
Diode PIN4 negative poles are connect, the other end is connected with diode PIN3 negative poles.
The present embodiment is core devices using PIN diode, is met using MOSFET drive schemes to PIN diodes
Fast motion, large driven current density requirement.Influence of the RF signals to DC bias circuit is suppressed using second order LC low pass filters, reduced
To the time delay influence of drive signal, ensure the decay to RF signals.Used in transmitting terminal to antenna end and antenna end to receiving terminal
Go here and there and topological structure formed single-pole double-throw switch (SPDT), with this meet single antenna realize transmitting-receiving switching requirement, insertion loss it is small and
Isolation is higher, and complex degree of structure is moderate.
When it is implemented, in drive circuit as shown in Figure 1, diode PIN Q2, Q4 for being driven through two triodes
Control；Triode Q2, Q4 break-make are controlled by metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 respectively.Control signal Control voltages are Transistor-Transistor Logic level,
Metal-oxide-semiconductor Q1, Q3 grid, MOS pipes Q1, Q3 grounded drain are connected to, metal-oxide-semiconductor Q3 source electrode is connected with resistance R3, resistance R3
Series resistance R2 composition potential-divider networks are followed by positive source V+.Metal-oxide-semiconductor Q1 source electrode is connected with resistance R4, resistance R4 series connection
Resistance R5 composition potential-divider networks are followed by power cathode V-.Resistance R1, R2 form triode Q2 biasing circuits, resistance R2 one end
It is connected with positive source V+, the other end is connected with resistance R3, triode Q2 base stages；Resistance R1 mono- terminates positive source V+, another
Terminate triode Q2 emitter stages；Triode Q2 colelctor electrodes and diode PIN positive pole short circuits.Whether resistance R2 has electric current to pass through certainly
Determined triode Q2 conducting whether.Resistance R5, R6 form triode Q4 biasing circuits, resistance R5 one end and power cathode V- phases
Even, the other end is connected with resistance R4, triode Q4 base stages；Resistance R6 mono- terminates power cathode V-, another termination triode Q4 hairs
Emitter-base bandgap grading；Triode Q4 colelctor electrodes and diode PIN positive pole short circuits.Whether resistance R5 has electric current by determining triode Q4's
Whether turn on.
Control signal Control voltages are Transistor-Transistor Logic level, and when Control voltages are timing, metal-oxide-semiconductor Q3 is turned on, metal-oxide-semiconductor Q1,
Triode Q4 is not turned on, and now has electric current to produce partial pressure, triode Q2 at resistance R2 ends by resistance R2, R3, positive source V+
Conducting, thus diode PIN is forward bias.When Control voltages is bear, metal-oxide-semiconductor Q1 conductings, metal-oxide-semiconductor Q3, triode
Q2 is not turned on, and pressure drop will be produced between triode Q4 base stage and emitter stage so that triode Q4 is turned on, and diode PIN is anti-
To biasing.
The control signal TP of the present embodiment detection system transmit-receive switch is in KHz or so, and RF signal ultrashort wave frequency bands,
Filter cutoff frequency should be limited within 100kHz, and its stopband attenuation at least should be 30dB.So RF signals by wave filter after
Amplitude be about the 3% of bias voltage, the influence to biasing circuit can be neglected.Low pass filter as shown in Figure 2 is one
The LC low pass filters being made up of 11uH inductance and 22nF electric capacity, two terminal impedances take 50 ohm.
Single-pole double-throw switch (SPDT) such as Fig. 3 is formed using string and topological structure to receiving terminal in transmitting terminal to antenna end and antenna end
Shown, C1, C2, C3, C4 and C5 are capacitance；For L1, L2, L3 and L4 high frequency choke coil.Antenna end passes through capacitance C3
It is connected afterwards with transmitting terminal diode PIN2, receiving terminal diode PIN3 positive poles.High frequency choke coil L5 one end be grounded, the other end with
Capacitance C3, diode PIN3 positive poles, diode PIN2 positive pole are connected.Switch direction by port Vbias1, Vbias2,
Vbias3, Vbias4 are controlled.High frequency choke coil L1, L2, L3 and L4 form bias voltage with electric capacity C6, C7, C8 and C9 respectively
After LC filter circuits are connected to port Vbias1, Vbias2, Vbias3, Vbias4.Electric capacity C6 one end is connected with port Vbias1, separately
One end is grounded；High frequency choke coil L1 one end is connected with port Vbias1, another terminating diode PIN1 negative poles；Diode PIN1 is just
Pole is grounded.Electric capacity C7 one end is connected with port Vbias2, other end ground connection；High frequency choke coil L1 one end and port Vbias2 phases
Even, another terminating diode PIN2 negative poles.Electric capacity C8 one end is connected with port Vbias3, other end ground connection；High frequency choke coil L3
One end is connected with port Vbias3, another terminating diode PIN3 negative poles.Electric capacity C9 one end is connected with port Vbias4, another
End ground connection；High frequency choke coil L4 one end is connected with port Vbias4, another terminating diode PIN4 negative poles；Diode PIN4 is just
Pole is grounded.Transmitting end signal is followed by diode PIN2 negative poles through capacitance C1, C2.Capacitance C1 one end connects transmitting terminal letter
Number, the other end is connected with diode PIN1 negative poles；The terminating diode PIN1 negative poles of capacitance C2 mono-, the other end and diode
PIN2 negative poles are connected.Receiving end signal is followed by diode PIN2 negative poles through capacitance C1, C2.Capacitance C5 mono- connects
Receiver signal, the other end are connected with diode PIN4 negative poles；The terminating diode PIN4 negative poles of capacitance C4 mono-, the other end and two
Pole pipe PIN3 negative poles are connected.
High frequency choke coil L5 enables port Vbias2 and port Vbias3 to form loop.When port Vbias1,
When Vbias3 forward bias and port Vbias2, Vbias4 reverse bias, diode PIN1, PIN3 cut-off, diode PIN2,
PIN4 is turned on, and now, circuit works in emission mode；When port Vbias1, Vbias3 reverse bias and port Vbias2,
During Vbias4 forward bias, now circuit works in reception pattern.Circuit is believed each bias voltage using independent control
Number, because diode PIN conductings and the switching of cut-off state have delay problem, in the case where measuring specific time delay, use
Independent control signal can accurately realize that every road diode PIN conducting and cut-off state switch, so as to effectively avoid launching
Interference of the signal to receiver, it can also ensure that receiver intactly receives echo-signal.
The present embodiment detection system transmit-receive switch disclosure satisfy that detection system transmitting-receiving altogether using diode PIN as core devices
With the requirement of common antenna.Ultrashort wave frequency band, maximum standing-wave ratio 1.5 are operated in, insertion loss is less than 1dB, and isolation is higher than
50dB, maximum switching speed are less than 10us, bear power 200W.Realize simplifying of detection system and portability.It is provided simultaneously with
Bear the characteristics of power is big, conversion speed is fast, isolation is high.
It should be appreciated that the part that this specification does not elaborate belongs to prior art.
Although describe specific embodiment of the present utility model, those of ordinary skill in the art above in association with accompanying drawing
It should be appreciated that these are merely illustrative of, various deformation or modification can be made to these embodiments, without departing from this practicality
New principle and essence.The scope of the utility model is only limited by the claims that follow.
Claims (4)
1. a kind of VHF ionospheric irregularities detection system transmit-receive switch, including transmitting terminal, receiving terminal, antenna end and power supply；Its
It is characterised by, including drive circuit, low pass filter and the topological structure being connected with the power supply；The drive circuit utilizes
Diode PIN is core devices, and diode PIN is driven using metal-oxide-semiconductor；The low pass filter uses second order LC LPFs
Device；The topological structure is to form single-pole double throw using string and topological structure to receiving terminal in transmitting terminal to antenna end and antenna end
Switch.
2. VHF ionospheric irregularities detection system transmit-receive switch as claimed in claim 1, it is characterised in that the driving
Diode PIN circuit includes control signal port connection metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 grid, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 drain electrode
Ground connection, metal-oxide-semiconductor Q3 source electrodes are connected with resistance R3, and resistance R3 series resistances R2 composition potential-divider networks are followed by positive source V+, MOS
Pipe Q1 source electrodes are connected with resistance R4, and resistance R4 series resistances R5 composition potential-divider networks are followed by power cathode V-；Resistance R1, resistance
R2 forms triode Q2 biasing circuits, and resistance R2 one end is connected with positive source V+, the other end and resistance R3, triode Q2 base stages
It is connected, resistance R1 mono- terminates positive source V+, another termination triode Q2 emitter stages, triode Q2 colelctor electrodes and diode PIN
Positive pole short circuit；Resistance R5, resistance R6 form triode Q4 biasing circuits, and resistance R5 one end is connected with power cathode V-, the other end
It is connected with resistance R4, triode Q4 base stages, resistance R6 mono- terminates power cathode V-, another termination triode Q4 emitter stages, three poles
Pipe Q4 colelctor electrodes and diode PIN positive pole short circuits.
3. VHF ionospheric irregularities detection system transmit-receive switch as claimed in claim 1, it is characterised in that the second order
The LC low pass filters that LC low pass filters are formed using 11uH inductance and 22nF electric capacity, two terminal impedances take 50 ohm.
4. VHF ionospheric irregularities detection system transmit-receive switch as claimed in claim 1, it is characterised in that described to send out
End is penetrated to antenna end with antenna end to receiving terminal using string and topological structure formation single-pole double-throw switch (SPDT) including the antenna end to lead to
Capacitance C3 is crossed with diode PIN2, diode PIN3 positive poles to be connected；High frequency choke coil L5 one end is grounded, the other end and blocking
Electric capacity C3, diode PIN2 positive poles, diode PIN3 positive poles are connected；Electric capacity C6 one end is connected with port Vbias1, another termination
Ground；High frequency choke coil L1 one end is connected with port Vbias1, and another terminating diode PIN1 negative poles, diode PIN1 positive poles connect
Ground；Electric capacity C7 one end is connected with port Vbias2, other end ground connection；High frequency choke coil L2 one end is connected with port Vbias2, separately
One terminating diode PIN2 negative poles；Electric capacity C8 one end is connected with port Vbias3, other end ground connection；High frequency choke coil L3 one end with
Port Vbias3 is connected, another terminating diode PIN3 negative poles；Electric capacity C9 one end is connected with port Vbias4, other end ground connection；
High frequency choke coil L4 one end is connected with port Vbias4, another terminating diode PIN4 negative poles；Diode PIN4 plus earths；Every
Straight electric capacity C1, capacitance C2 and diode PIN2 negative pole phases side；Capacitance C1 one end connects transmitting terminal, another terminating diode
PIN1 negative poles；The terminating diode PIN1 negative poles of capacitance C2 mono-, another terminating diode PIN2 negative poles；Capacitance C5 one end
Receiving terminal is connect, the other end is connected with diode PIN4 negative poles；The terminating diode PIN4 negative poles of capacitance C4 mono-, the other end and two
Pole pipe PIN3 negative poles are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720227174.0U CN206725750U (en) | 2017-03-09 | 2017-03-09 | A kind of VHF ionospheric irregularities detection system transmit-receive switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720227174.0U CN206725750U (en) | 2017-03-09 | 2017-03-09 | A kind of VHF ionospheric irregularities detection system transmit-receive switch |
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| Publication Number | Publication Date |
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| CN206725750U true CN206725750U (en) | 2017-12-08 |
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| CN201720227174.0U Expired - Fee Related CN206725750U (en) | 2017-03-09 | 2017-03-09 | A kind of VHF ionospheric irregularities detection system transmit-receive switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582118A (en) * | 2023-07-12 | 2023-08-11 | 杭州晟珈智能科技有限公司 | RFID antenna virtual switch circuit and multi-antenna multiplexing device |
-
2017
- 2017-03-09 CN CN201720227174.0U patent/CN206725750U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582118A (en) * | 2023-07-12 | 2023-08-11 | 杭州晟珈智能科技有限公司 | RFID antenna virtual switch circuit and multi-antenna multiplexing device |
| CN116582118B (en) * | 2023-07-12 | 2023-10-13 | 杭州晟珈智能科技有限公司 | RFID antenna virtual switch circuit and multi-antenna multiplexing device |
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Granted publication date: 20171208 Termination date: 20190309 |