CN209593401U - A kind of ultrashort wave antenna combiner - Google Patents
A kind of ultrashort wave antenna combiner Download PDFInfo
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- CN209593401U CN209593401U CN201920325392.7U CN201920325392U CN209593401U CN 209593401 U CN209593401 U CN 209593401U CN 201920325392 U CN201920325392 U CN 201920325392U CN 209593401 U CN209593401 U CN 209593401U
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Abstract
The utility model proposes a kind of ultrashort wave antenna combiners, by the way that intervalve matching circuit is arranged, it can be according to LC resonance principle, low-pass filter is formed using capacitor and inductor, it cancels out each other with the parasitic capacitance of the parasitic inductance of RF cable, the parasitic capacitance of cascaded RF cable, the parasitic inductance of 3dB electric bridge and 3dB electric bridge, reaches the impedance operator for improving combiner；By the way that directional coupler is arranged, the output power of combiner can be monitored, and then monitor the impedance operator of combiner, the serious forgiveness of cascade combiner can be improved in directional coupler combination intervalve matching circuit, and optimization level joins the stability of combiner；By the way that coupled capacitor is arranged in directional coupler, directional coupler occupied area can be effectively reduced；The identical PIN switched capacitor array of 12 line structures must be used, it can be achieved that the accurate quick response of filter centre frequency, has highly selective, small bandwidth, the characteristic of lower input vswr by the way that co-located filter is arranged.
Description
Technical field
The utility model relates to wireless communication field more particularly to a kind of ultrashort wave antenna combiners.
Background technique
Recently as the rapid development of electronic technology, radio communication technology using more and more extensive.It is answered in engineering
In, needs two signals of different frequency or multiple signals while exporting, that is, combiner can be used.It can be made using combiner
Set of system works at the same time the different frequency in several different frequency ranges or same frequency range.Such as in a communications system, by different works
After the radio station of working frequency passes through combiner, an antenna is accessed, this has not only saved an antenna, it is thus also avoided that switch not on the same day
The trouble of line.High-power super ultrashort wave multi-circuit combiner is in the end of transmitter and the front end of receiver, major function
It is the isolation and combining realized between multichannel.But when combiner is cascaded, it is easy parasitic inductance, the grade by RF cable
Join the influence of the parasitic parameters such as the parasitic capacitance of the parasitic capacitance of RF cable, the parasitic inductance of 3dB electric bridge and 3dB electric bridge,
Impedance is caused to deteriorate and improve the unstability of communication system.Therefore, to solve the above problems, the utility model provides one
Kind can offset the parasitic inductance and parasitic capacitance that RF cable and 3dB electric bridge generate, and improve the ultrashort wave of combiner stability
Antenna combiner.
Utility model content
In view of this, the utility model proposes one kind can offset the parasitic inductance that RF cable and 3dB electric bridge generate
And parasitic capacitance, improve the ultrashort wave antenna combiner of combiner stability.
The technical solution of the utility model is achieved in that the utility model provides a kind of ultrashort wave antenna combining
Device comprising rf input terminal, antenna, the first co-located filter, the second co-located filter, the first 3dB electric bridge, the 2nd 3dB
Electric bridge and microprocessor further include intervalve matching circuit and directional coupler；
The IN input terminal of first 3dB electric bridge and rf input terminal are electrically connected, and the first co-located filter is respectively with first
90 ° of output ends of 0 ° of output end of 3dB electric bridge and the 2nd 3dB electric bridge are electrically connected, the second co-located filter respectively with the first 3dB
0 ° of output end of 90 ° of output ends of electric bridge and the 2nd 3dB electric bridge is electrically connected, between the ISO input terminal and grade of the 2nd 3dB electric bridge
It is electrically connected with circuit, the IN input terminal of the 2nd 3dB electric bridge is electrically connected by directional coupler and antenna, microprocessor difference
It is electrically connected with the first co-located filter and the second co-located filter.
On the basis of above technical scheme, it is preferred that intervalve matching circuit includes inductance L37, capacitor C93 and capacitor
C94；
The ISO input terminal of one end of inductance L37 and the 2nd 3dB electric bridge is electrically connected, the other end and capacitor of inductance L37
One end of C94 is electrically connected, and one end of capacitor C93 and one end of inductance L37 are electrically connected, the other end and capacitor of capacitor C93
The other end of C94 is grounded.
On the basis of above technical scheme, it is preferred that directional coupler include inductance L38, inductance L39, resistance R39 and
Capacitor C95-C97；
One end of inductance L38 IN input terminal with one end of capacitor C95, one end of capacitor C96 and the 2nd 3dB electric bridge respectively
Be electrically connected, the other end of capacitor C95 and the other end of capacitor C96 be grounded, the other end of inductance L38 respectively with capacitor C97
One end and antenna be electrically connected, the other end of capacitor C97 ground connection, one end ground connection of inductance L39, the other end of inductance L39 is logical
Cross resistance R39 ground connection.
On the basis of above technical scheme, it is preferred that the first co-located filter and the second co-located filter construction are identical.
It is further preferred that the first co-located filter includes the identical PIN switched capacitor array of 12 line structures；
The identical PIN switched capacitor array of 12 line structures is electrically connected with the third end of microprocessor and 3dB electric bridge respectively.
It is further preferred that PIN switched capacitor array includes inductance L1~L4, resistance R1~R4, diode D1~D4 and
Capacitor C1~C6；
0 ° of output end of one end of inductance L1 and the first 3dB electric bridge is electrically connected, the other end of inductance L1 and inductance L2's
One end is grounded, and the other end of inductance L2 and one end of capacitor C1 are electrically connected, and the other end of capacitor C1 is respectively with resistance R1's
The anode electric connection of one end, one end of resistance R2, the cathode of varactor D1 and varactor D2, resistance R1's is another
End and the anode of varactor D1 are electrically connected, and the other end of resistance R2 and the cathode of varactor D2 are electrically connected, electricity
The anode of one end and varactor D1 for holding C3 is electrically connected, and one end of capacitor C4 electrically connects with the cathode of varactor D2
It connecing, the other end of capacitor C3 and the other end of capacitor C4 are grounded, and the cathode and microprocessor of varactor D2 is electrically connected,
The anode of varactor D1 is electrically connected with the power supply；
90 ° of output ends of one end of inductance L4 and the 2nd 3dB electric bridge are electrically connected, the other end of inductance L4 and inductance L3's
One end is grounded, and the other end of inductance L3 and one end of capacitor C2 are electrically connected, and the other end of capacitor C2 is respectively with resistance R3's
The anode electric connection of one end, one end of resistance R4, the cathode of varactor D3 and varactor D4, resistance R3's is another
End and the anode of varactor D3 are electrically connected, and the other end of resistance R4 and the cathode of varactor D4 are electrically connected, electricity
The anode of one end and varactor D3 for holding C5 is electrically connected, and one end of capacitor C6 electrically connects with the cathode of varactor D4
It connecing, the other end of capacitor C5 and the other end of capacitor C6 are grounded, and the cathode and microprocessor of varactor D4 is electrically connected,
The anode of varactor D3 is electrically connected with the power supply.
It is further preferred that microprocessor is SST39VF-TSOP48；
The D0 pin of the SST39VF-TSOP48 negative electricity with the cathode of varactor D2 and varactor D4 respectively
Property connection.
On the basis of above technical scheme, it is preferred that further include 50 Ω load；
50 Ω load and the second input terminal of the first 3dB electric bridge are electrically connected.
A kind of ultrashort wave antenna combiner of the utility model has the advantages that compared with the existing technology
(1) by setting intervalve matching circuit, low-pass filtering can be formed using capacitor and inductor according to LC resonance principle
Device, with the parasitic inductance of RF cable, the parasitic capacitance of cascaded RF cable, the parasitic inductance of 3dB electric bridge and 3dB electric bridge
Parasitic capacitance is cancelled out each other, and the impedance operator for improving combiner is reached；
(2) by setting directional coupler, the output power of combiner can be monitored, and then the impedance for monitoring combiner is special
Property, the serious forgiveness of cascade combiner, the stabilization of optimization level connection combiner can be improved in directional coupler combination intervalve matching circuit
Property；
(3) by the way that coupled capacitor is arranged in directional coupler, directional coupler occupied area can be effectively reduced；
(4) the identical PIN switched capacitor array of 12 line structures must be used, it can be achieved that filtering by the way that co-located filter is arranged
The accurate quick response of device centre frequency has highly selective, small bandwidth, the characteristic of lower input vswr；
(5) whole device trap wave point has quick response, and impedance operator is excellent, serious forgiveness height and the good feature of stability.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structure chart of ultrashort wave antenna combiner of the utility model；
Fig. 2 is that a kind of ultrashort wave antenna combiner of the utility model cascades schematic diagram；
Fig. 3 is the circuit diagram of the first co-located filter in a kind of ultrashort wave antenna combiner of the utility model；
Fig. 4 is the circuit diagram of intervalve matching circuit in a kind of ultrashort wave antenna combiner of the utility model；
Fig. 5 is the circuit diagram of directional coupler in a kind of ultrashort wave antenna combiner of the utility model.
Specific embodiment
Below in conjunction with the utility model embodiment, the technical solution in the utility model embodiment is carried out clear
Chu is fully described by, it is clear that and described embodiment is only a part of embodiment of the utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work
Under the premise of every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of ultrashort wave antenna combiner of the utility model comprising rf input terminal, antenna,
One co-located filter, the second co-located filter, the first 3dB electric bridge, the 2nd 3dB electric bridge, microprocessor, 50 Ω load, between grade
With circuit and directional coupler.
In order to shorten the development cycle of combiner, the scalability and versatility of combiner are improved, it can be practical new by N number of
The combiner of type cascades, and N number of signal can be added to a port, in the present embodiment, by the combining of N number of the utility model
Device cascade, N number of radiofrequency signal enter the IN input terminal of the first 3dB electric bridge in N number of combiner, n-th correspondingly respectively
The ISO input terminal of the 2nd 3dB electric bridge in combiner passes through the 2nd 3dB electricity in intervalve matching circuit and the N-1 combiner
The directional coupler of bridge is electrically connected, and the IN input terminal of the 2nd 3dB electric bridge in n-th combiner passes through directional coupler and day
Line is electrically connected.Therefore in the structure that this introduces n-th combiner in cascade combiner.
Input signal can be transformed into the amplitudes such as two, the half-power signal that phase difference is 90 degree by the first 3dB electric bridge；The
The amplitudes such as two, the half-power signal that phase difference is 90 degree are synthesized signal all the way by two 3dB electric bridges.In this embodiment, such as Fig. 1
Shown, the IN input terminal of the first 3dB electric bridge and rf input terminal are electrically connected in n-th combiner, and the of the first 3dB electric bridge
Two input terminals and 50 Ω load be electrically connected, the first co-located filter respectively with 0 ° of output end of the first 3dB electric bridge and the 2nd 3dB
90 ° of output ends of electric bridge are electrically connected, and the second co-located filter is electric with 90 ° of output ends of the first 3dB electric bridge and the 2nd 3dB respectively
0 ° of output end of bridge is electrically connected, and the ISO input terminal of the 2nd 3dB electric bridge passes through intervalve matching circuit and the N-1 combiner
Directional coupler is electrically connected, and the IN input terminal of the 2nd 3dB electric bridge is electrically connected by directional coupler and antenna, microprocessor
It is electrically connected respectively with the first co-located filter and the second co-located filter.
Wherein, as shown in Fig. 2, radiofrequency signal is input to the first 3dB electric bridge in the N-1 combiner through rf input terminal
IN input terminal after, the same frequency signal of 90 degree of half-power phase phase difference is divided into, when two this signals pass through unanimously respectively
When the centre frequency of the preferable first co-located filter of property and the second co-located filter, then it is absorbed into using 50 ohm loads
Ground；When the two signals pass through the stopband of co-located filter respectively, 90 ° of output ends of the 2nd 3dB electric bridge will be reflected to
A signal is synthesized with the second input terminal to export into n-th combiner.Since signal will carry out power distribution by 3dB electric bridge
And synthesis, and requirement of the power combing of 3dB electric bridge to phase is very high, so the first co-located filter and the second co-located filter
Must approach and synchronize to be controlled, and the phases error of 3dB electric bridge wants small.
The structure of first co-located filter and the second co-located filter is identical, and is opened using the identical PIN of 12 line structures
Capacitor array is closed, it can be achieved that the accurate quick response of filter centre frequency, there is highly selective, small bandwidth, lower input to stay
The characteristic of Bobbi.In the present embodiment, as shown in figure 3, the first co-located filter includes the identical PIN switching capacity of 12 line structures
Array；Wherein, PIN switched capacitor array includes inductance L1~L4, resistance R1~R4, diode D1~D4 and capacitor C1~C6；
Specifically, 0 ° of output end of one end of inductance L1 and the first 3dB electric bridge is electrically connected, the one of the other end of inductance L1 and inductance L2
End is grounded, and one end of the other end of inductance L2 and capacitor C1 are electrically connected, the other end of capacitor C1 respectively with resistance R1 one
The anode electric connection at end, one end of resistance R2, the cathode of varactor D1 and varactor D2, the other end of resistance R1
It is electrically connected with the anode of varactor D1, the other end of resistance R2 and the cathode of varactor D2 are electrically connected, capacitor
One end of C3 and the anode of varactor D1 are electrically connected, and one end of capacitor C4 electrically connects with the cathode of varactor D2
It connecing, the other end of capacitor C3 and the other end of capacitor C4 are grounded, and the cathode and microprocessor of varactor D2 is electrically connected,
The anode of varactor D1 is electrically connected with the power supply；One end of inductance L4 and 90 ° of output ends of the 2nd 3dB electric bridge electrically connect
It connects, the other end of inductance L4 and one end of inductance L3 are grounded, and the other end of inductance L3 and one end of capacitor C2 are electrically connected, electricity
Hold C2 the other end respectively with one end of resistance R3, one end of resistance R4, the cathode of varactor D3 and varactor D4
Anode be electrically connected, the anode of the other end of resistance R3 and varactor D3 are electrically connected, the other end of resistance R4 and change
The cathode for holding diode D4 is electrically connected, and one end of capacitor C5 and the anode of varactor D3 are electrically connected, and the one of capacitor C6
End and the cathode of varactor D4 are electrically connected, and the other end of capacitor C5 and the other end of capacitor C6 are grounded, two pole of transfiguration
The cathode and microprocessor of pipe D4 is electrically connected, and the anode of varactor D3 is electrically connected with the power supply.Wherein, L1, L2 are resistance
Anti- matching inductance plays the role of adjusting impedance matching；L3, L4 are main resonant inductance, and effect is to participate in resonance；D1, D2, D3 and
D4 is PIN switching diode, and on and off reaches change and participates in resonant capacitance value.It is shared in 12 the first resonance circuits of tunnel
Inductance L1 and inductance L2, the second resonance circuit share inductance L3 and inductance L4.
Intervalve matching circuit neutralizes it mutually with parasitic parameter, can improve cascade by adjusting the parameter of capacitor and inductor
Impedance operator afterwards.In the present embodiment, as shown in figure 4, intervalve matching circuit includes inductance L37, capacitor C93 and capacitor C94；
Specifically, the ISO input terminal of one end of inductance L37 and the 2nd 3dB electric bridge is electrically connected, the other end and capacitor C94 of inductance L37
One end be electrically connected, one end of one end of capacitor C93 and inductance L37 are electrically connected, the other end and capacitor C94 of capacitor C93
The other end be grounded.Wherein, inductance L37, capacitor C93 and capacitor C94 form third-order low-pass filter, by adjusting capacitor electricity
The parameter of sense neutralizes it mutually with parasitic parameter, can improve the impedance operator after cascading and mention at the same time it can also inhibit harmonic wave
The harmonic responses of high combiner.
Directional coupler, real-time monitoring combiner power, antenna open short-circuit condition and cascade the impedance of combiner, orient coupling
Clutch combination intervalve matching circuit, can be improved the serious forgiveness of cascade combiner, and optimization level joins the stability of combiner.In this reality
It applies in example, as shown in figure 5, directional coupler includes inductance L38, inductance L39, resistance R39 and capacitor C95-C97；Specifically, electric
The one end for feeling L38 is electrically connected with the IN input terminal of one end of capacitor C95, one end of capacitor C96 and the 2nd 3dB electric bridge respectively,
The other end of capacitor C95 and the other end of capacitor C96 are grounded, the other end of inductance L38 respectively with one end and day of capacitor C97
Line is electrically connected, the other end ground connection of capacitor C97, one end ground connection of inductance L39, and the other end of inductance L39 is connect by resistance R39
Ground.Traditional directional coupler uses 50 Ohm transmission cable architecture of quarter-wave, will occupy biggish area, on solving
Problem is stated, the utility model adds coupled capacitor C95-C97, can effectively reduce directional coupler occupied area；In addition, capacitor
C95-C97 and inductance L38 constitute output impedance matching networks.
The foregoing is merely the better embodiments of the utility model, are not intended to limit the utility model, it is all
Within the spirit and principles of the utility model, it is practical new to should be included in this for any modification, equivalent replacement, improvement and so on
Within the protection scope of type.
Claims (8)
1. a kind of ultrashort wave antenna combiner comprising rf input terminal, antenna, the first co-located filter, the second co-located filter
Wave device, the first 3dB electric bridge, the 2nd 3dB electric bridge and microprocessor, it is characterised in that: further include intervalve matching circuit and orientation coupling
Clutch；
The IN input terminal of the first 3dB electric bridge and rf input terminal are electrically connected, and the first co-located filter is respectively with first
90 ° of output ends of 0 ° of output end of 3dB electric bridge and the 2nd 3dB electric bridge are electrically connected, the second co-located filter respectively with the first 3dB
0 ° of output end of 90 ° of output ends of electric bridge and the 2nd 3dB electric bridge is electrically connected, between the ISO input terminal and grade of the 2nd 3dB electric bridge
It is electrically connected with circuit, the IN input terminal of the 2nd 3dB electric bridge is electrically connected by directional coupler and antenna, microprocessor difference
It is electrically connected with the first co-located filter and the second co-located filter.
2. a kind of ultrashort wave antenna combiner as described in claim 1, it is characterised in that: the intervalve matching circuit includes electricity
Feel L37, capacitor C93 and capacitor C94；
One end of the inductance L37 and the ISO input terminal of the 2nd 3dB electric bridge are electrically connected, the other end and capacitor of inductance L37
One end of C94 is electrically connected, and one end of capacitor C93 and one end of inductance L37 are electrically connected, the other end and capacitor of capacitor C93
The other end of C94 is grounded.
3. a kind of ultrashort wave antenna combiner as described in claim 1, it is characterised in that: the directional coupler includes inductance
L38, inductance L39, resistance R39 and capacitor C95-C97；
One end of inductance L38 IN input terminal with one end of capacitor C95, one end of capacitor C96 and the 2nd 3dB electric bridge respectively
Be electrically connected, the other end of capacitor C95 and the other end of capacitor C96 be grounded, the other end of inductance L38 respectively with capacitor C97
One end and antenna be electrically connected, the other end of capacitor C97 ground connection, one end ground connection of inductance L39, the other end of inductance L39 is logical
Cross resistance R39 ground connection.
4. a kind of ultrashort wave antenna combiner as described in claim 1, it is characterised in that: the first co-located filter and the
Two co-located filter constructions are identical.
5. a kind of ultrashort wave antenna combiner as claimed in claim 4, it is characterised in that: the first co-located filter includes
The identical PIN switched capacitor array of 12 line structures；
PIN switched capacitor array described in 12 tunnels is electrically connected with the third end of microprocessor and 3dB electric bridge respectively.
6. a kind of ultrashort wave antenna combiner as claimed in claim 5, it is characterised in that: the PIN switched capacitor array packet
Include inductance L1~L4, resistance R1~R4, diode D1~D4 and capacitor C1~C6；
0 ° of output end of one end of the inductance L1 and the first 3dB electric bridge is electrically connected, the other end of inductance L1 and inductance L2's
One end is grounded, and the other end of inductance L2 and one end of capacitor C1 are electrically connected, and the other end of capacitor C1 is respectively with resistance R1's
The anode electric connection of one end, one end of resistance R2, the cathode of varactor D1 and varactor D2, resistance R1's is another
End and the anode of varactor D1 are electrically connected, and the other end of resistance R2 and the cathode of varactor D2 are electrically connected, electricity
The anode of one end and varactor D1 for holding C3 is electrically connected, and one end of capacitor C4 electrically connects with the cathode of varactor D2
It connecing, the other end of capacitor C3 and the other end of capacitor C4 are grounded, and the cathode and microprocessor of varactor D2 is electrically connected,
The anode of varactor D1 is electrically connected with the power supply；
90 ° of output ends of one end of the inductance L4 and the 2nd 3dB electric bridge are electrically connected, the other end of inductance L4 and inductance L3's
One end is grounded, and the other end of inductance L3 and one end of capacitor C2 are electrically connected, and the other end of capacitor C2 is respectively with resistance R3's
The anode electric connection of one end, one end of resistance R4, the cathode of varactor D3 and varactor D4, resistance R3's is another
End and the anode of varactor D3 are electrically connected, and the other end of resistance R4 and the cathode of varactor D4 are electrically connected, electricity
The anode of one end and varactor D3 for holding C5 is electrically connected, and one end of capacitor C6 electrically connects with the cathode of varactor D4
It connecing, the other end of capacitor C5 and the other end of capacitor C6 are grounded, and the cathode and microprocessor of varactor D4 is electrically connected,
The anode of varactor D3 is electrically connected with the power supply.
7. a kind of ultrashort wave antenna combiner as claimed in claim 6, it is characterised in that: the microprocessor is SST39VF-
TSOP48；
The D0 pin of the SST39VF-TSOP48 negative electricity with the cathode of varactor D2 and varactor D4 respectively
Property connection.
8. a kind of ultrashort wave antenna combiner as described in claim 1, it is characterised in that: further include 50 Ω load；
The 50 Ω load and the second input terminal of the first 3dB electric bridge are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920325392.7U CN209593401U (en) | 2019-03-14 | 2019-03-14 | A kind of ultrashort wave antenna combiner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920325392.7U CN209593401U (en) | 2019-03-14 | 2019-03-14 | A kind of ultrashort wave antenna combiner |
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| Publication Number | Publication Date |
|---|---|
| CN209593401U true CN209593401U (en) | 2019-11-05 |
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| CN201920325392.7U Active CN209593401U (en) | 2019-03-14 | 2019-03-14 | A kind of ultrashort wave antenna combiner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131899A (en) * | 2019-12-31 | 2021-07-16 | 深圳市大富科技股份有限公司 | Circuit for expanding bandwidth of coupler and mobile communication equipment |
| CN115378464A (en) * | 2022-08-12 | 2022-11-22 | 江苏德是和通信科技有限公司 | Synthetic switched systems of transmitter owner spare machine |
-
2019
- 2019-03-14 CN CN201920325392.7U patent/CN209593401U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131899A (en) * | 2019-12-31 | 2021-07-16 | 深圳市大富科技股份有限公司 | Circuit for expanding bandwidth of coupler and mobile communication equipment |
| CN115378464A (en) * | 2022-08-12 | 2022-11-22 | 江苏德是和通信科技有限公司 | Synthetic switched systems of transmitter owner spare machine |
| CN115378464B (en) * | 2022-08-12 | 2023-08-15 | 江苏德是和通信科技有限公司 | Main and standby machine synthesis switching system of transmitter |
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