CN204516879U - A kind of mixer comprising three road VHF and a road UHF - Google Patents
A kind of mixer comprising three road VHF and a road UHF Download PDFInfo
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- CN204516879U CN204516879U CN201520263745.7U CN201520263745U CN204516879U CN 204516879 U CN204516879 U CN 204516879U CN 201520263745 U CN201520263745 U CN 201520263745U CN 204516879 U CN204516879 U CN 204516879U
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Abstract
The utility model discloses a kind of mixer comprising three road VHF and a road UHF, comprise substrate, filter, three tunnels with frequency combiner and matching network, described filter, the three same frequency combiners in tunnel, matching network are all arranged on substrate, and matching network comprises the first matching network and the second matching network; Described filter comprises the first filter, the second filter, the 3rd filter, the 4th filter; The utility model adopts along separate routes matching process, is connected in series LC resonant circuit in VHF frequency range with the output of frequency combiner and uhf band band pass filter simultaneously, achieves mating of circuit and load, reduces the return loss of each passage; Secondly, the utility model is compact to design, and all components and parts form by LCR.Especially use the Wilkinson power divider of lamped element equivalence, the volume of same frequency combiner is significantly reduced, and lightweight, structure is simple, and cost is low, easy of integrationization, is more applicable for engineering.
Description
Technical field
The utility model discloses a kind of mixer comprising three road VHF and a road UHF, relate to signal processing technology field.
Background technology
In recent years, along with multiband, multi-service mobile communication system play more and more important effect in wireless application, the fast development of mobile communications network, outdoor quorum sensing inhibitor rate has met the demand of society substantially, and the network coverage indoor is by contrast few very few.Under the background that China deepens the reforms in an all-round way, Economy Potential must increase further, the scale in city constantly expands, the office building of skyscraper, labyrinth, megastore, and show room and conference centre's contour level building have very strong obstruction and the effect of decay to signal.And large at these local flows of the people, localized network capacity cannot meet the demand of user, wireless channel has been caused to block and instability.And the communication system of China is also that multiple communication system exists jointly, 2G, 3G, 4G have user.If all set up receive-transmit system for often kind of system, the waste of resource will inevitably be caused, but also interference can be caused to other system systems, reduce network quality, reduce power system capacity.In order to address this problem, a kind of energy Multi net voting must be set up and jointly exist and non-interfering system.Mixer is the most critical equipment addressed this problem.
In existing mixer, operating frequency mostly all concentrates on GHz and is all the conjunction road between multichannel different frequency, lacks the multichannel being operated in VHF frequency range (30-88MHz) and uhf band (225-512MHz) closes road mixer with frequency and alien frequencies.And existing mixer is realize with cavity or microstrip structure mostly, cause mixer processing cost high and performance is subject to the impact of machining accuracy.Greatly, Heavy Weight, can not meet miniaturization, portability, integrated requirement for cavity or microstrip structure mixer volume.
Utility model content
Technical problem to be solved in the utility model is: for the defect of prior art, a kind of mixer comprising three road VHF and a road UHF is provided, structure is simple, volume is little, lightweight, the LC mixer that cost is low, makes it better be applied in VHF and UHF field, especially in engineering, has higher using value.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
A kind of mixer comprising three road VHF and a road UHF, comprise substrate, filter, three tunnels with frequency combiner and matching network, described filter, the three same frequency combiners in tunnel, matching network are all arranged on substrate, and matching network comprises the first matching network and the second matching network;
Described filter comprises the first filter, the second filter, the 3rd filter, the 4th filter;
Described three tunnels comprise three inputs, an output with frequency combiner;
One end of one end of described second filter, one end of the 3rd filter, the 4th filter is connected with three inputs of three tunnels with frequency combiner respectively, and described three tunnels are connected with one end of the second matching network with the output of frequency combiner;
One end of described first filter is connected with one end of the first matching network, and the other end of described first matching network is connected with the other end of the second matching network.
As further prioritization scheme of the present utility model, described first, second, third, fourth filter is LC band pass filter.
As further prioritization scheme of the present utility model, described first, second, third, fourth filter is the Chebyshev filter on five rank.
As further prioritization scheme of the present utility model, described second, third, the 4th filter construction is identical, include the first inductance, the first electric capacity, the second inductance, the second electric capacity, the 3rd inductance, the 3rd electric capacity, the 4th inductance, the 4th electric capacity, the 5th inductance, the 5th electric capacity, one end of described first inductance is connected with one end of the first electric capacity, the other end of described first electric capacity is connected with one end of the second inductance, one end of the second electric capacity, one end of the 3rd inductance respectively, the other end of described second inductance, the equal ground connection of the other end of the second electric capacity;
The other end of described 3rd inductance is connected with one end of the 3rd electric capacity, the other end of described 3rd electric capacity is connected with one end of the 4th inductance, one end of the 4th electric capacity, one end of the 5th inductance respectively, the other end of described 4th inductance, the other end of the 4th electric capacity are connected equal ground connection, and the other end of described 5th inductance connects one end of the 5th electric capacity.
As further prioritization scheme of the present utility model, described three tunnels comprise the 12 electric capacity with frequency combiner, 13 electric capacity, 14 electric capacity, 15 electric capacity, 16 electric capacity, 17 electric capacity, 18 electric capacity, 19 electric capacity, 20 electric capacity, 21 electric capacity, 22 electric capacity, 23 electric capacity, 12 inductance, 13 inductance, 14 inductance, 18 inductance, 19 inductance, 20 inductance, 25 inductance, 26 inductance, 27 inductance, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance,
One end of described 12 electric capacity is connected with one end of the 12 inductance, one end of the 16 electric capacity, one end of the 18 inductance, one end of the 25 inductance, one end of the 20 electric capacity respectively;
The other end of described 12 inductance is connected with one end of the 13 electric capacity, one end of the 13 inductance, one end of the first resistance respectively; The other end of described 13 inductance is connected with one end of the 14 electric capacity, one end of the 14 inductance, one end of the second resistance respectively; The other end of described 14 inductance is connected with one end of the 15 electric capacity, one end of the 3rd resistance respectively;
The other end of described 12 electric capacity, the other end of the 13 electric capacity, the other end of the 14 electric capacity, the equal ground connection of the other end of the 15 electric capacity;
The other end of described 18 inductance connects the other end of the first resistance, one end of the 19 inductance, one end of the 17 electric capacity, one end of the 4th resistance respectively, the other end of described 19 inductance connects the other end of the second resistance, one end of the 20 inductance, one end of the 5th resistance, one end of the 18 electric capacity respectively, and the other end of described 20 inductance connects one end of the 3rd resistance, one end of the 19 electric capacity, one end of the 6th resistance respectively;
The other end of described 16 electric capacity, the other end of the 17 electric capacity, the other end of the 18 electric capacity, the equal ground connection of the other end of the 19 electric capacity;
The other end of described 25 inductance connects the other end of the 4th resistance, one end of the 21 electric capacity, one end of the 26 inductance respectively, the other end of described 26 inductance connects the other end of the 5th resistance, one end of the 27 inductance, one end of the 22 electric capacity respectively, the other end of described 27 inductance connects the other end of the 6th resistance, one end of the 23 electric capacity respectively
The other end of described 20 electric capacity, the other end of the 21 electric capacity, the other end of the 22 electric capacity, the equal ground connection of the other end of the 23 electric capacity.
As further prioritization scheme of the present utility model, described first matching network and the composition of the second matching network are the electric capacity and inductance of connecting.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
Mixer of the present utility model, adopts along separate routes matching process, is connected in series LC resonant circuit in VHF frequency range with the output of frequency combiner and uhf band band pass filter simultaneously, achieves mating of circuit and load, reduces the return loss of each passage; Secondly, the utility model is compact to design, and all components and parts form by inductance, electric capacity and resistance.Especially use the Wilkinson power divider of lamped element equivalence, the volume of same frequency combiner is significantly reduced, and lightweight, structure is simple, and cost is low, easy of integrationization, is more applicable for engineering.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model;
C1-C23 represents that the first electric capacity is to the 23 electric capacity respectively, the inductance of L1-L27 first inductance to the 27,1 is substrate, 2-1,2-2 represent the first matching network, the second matching network respectively, 3 represent the three same frequency combiners in tunnel, 4-1,4-2,4-3,4-4 represent first, second, third, fourth filter respectively, and A, B, C, D, E represent the first port, the second port, the 3rd port, the 4th port, five-port respectively;
Fig. 2 is the insertion loss schematic diagram of UHF radio frequency path;
Fig. 3 is the return loss schematic diagram of UHF radio frequency path;
Fig. 4 is the insertion loss schematic diagram of VHF radio frequency path;
Fig. 5 and Fig. 6 is the return loss schematic diagram of VHF radio frequency path;
Fig. 7 is the isolation schematic diagram between VHF and UHF radio frequency path;
Fig. 8 and Fig. 9 is that VHF is with the isolation frequently between radio frequency path.
Embodiment
Be described below in detail execution mode of the present utility model, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the utility model.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:
Structural model schematic diagram of the present utility model, as shown in Figure 1, a kind of mixer comprising three road VHF and a road UHF, substrate, filter, three tunnels are with frequency combiner and matching network, matching network is two, structure is identical, and the first matching network and the composition of the second matching network are the electric capacity and inductance of connecting, and substrate is printed circuit board (PCB).
Filter comprises the first filter, the second filter, the 3rd filter, the 4th filter.
The operating frequency of the first filter is UHF(225MHz-512MHz); Second, third, the 4th filter is three duplicate filters, its operating frequency is VHF(30MHz-88MHz).
First, second, third, fourth filter is LC band pass filter.The exponent number of described first, second, third, fourth filter is five rank, and the type function of first, second, third, fourth filter is Chebyshev.
Three tunnels are four port networks with frequency combiner, and three tunnels input a road and export.Three tunnels are the inverse process of Wilkinson power divider with frequency combiner, and it act as the conjunction road of same frequency and can ensure isolation certain between same frequency.
Three tunnels are 30-88MHz with the operating frequency of frequency combiner, but because three tunnels are too low with the Out-of-band rejection of frequency combiner, so respectively access a band pass filter on three tunnels with the input port of frequency combiner, namely second, third, the 4th filter, to reach the effect with other frequency isolation.
All lumped-parameter elements of the utility model mixer are surface mounting component, and all welding on a printed circuit.The utility model mixer is totally five ports, is distributed in the circuit board left and right sides.Wherein left side is the first port, and right side is followed successively by the second port, the 3rd port, the 4th port, five-port from top to bottom, and as shown in Figure 1, A represents the first port, and B, C, D, E represent the second port, the 3rd port, the 4th port, five-port respectively.
The port of the first filter, namely the second port is for receiving the radiofrequency signal of 225-512MHz, second, third, the input of the 4th filter, be namely respectively the 3rd port, the 4th port, five-port, for receiving the radiofrequency signal of 30-88MHz.Second, third, the 30-88MHz signal Jing San Road received synthesizes behind a road again through the second matching network with frequency combiner by the 4th filter, that receive with the first filter and carry out conjunction road by the 225-512MHz signal that the second matching network exports simultaneously, finally export.
The all right reverse operation of this circuit, signal inputs via the joint of the first matching network and the second matching network, and signal exports after being branched out to first, second, third, fourth filter.
As shown in Figure 2, at radio frequency path UHF(225-512MHz) in frequency range, loss is less than 0.1dB, and the Out-of-band rejection of 30-88MHz is less than-60dB.
As shown in Figure 3, at radio frequency path UHF(225MHz-512MHz) return loss in frequency range is less than-20dB, shows that this mixer coupling is good.
As shown in Figure 4, at radio frequency path VHF(30-88MHz) in frequency range, three tunnels are less than 4.9dB with the loss of frequency combiner.
As shown in Fig. 5, Fig. 6, at radio frequency path VHF(30-88MHz) in frequency range, the return loss with frequency combiner is all less than-20dB.
As shown in Figure 7, UHF(225-512MHz) radio frequency path and VHF(30-88MHz) isolation of radio frequency path is less than-60dB.
As shown in Fig. 8, Fig. 9, at radio frequency path VHF(30-88MHz) in frequency range, the isolation with frequency combiner is less than-21dB.
Because these three tunnels are wider with the relative bandwidth of frequency combiner Zhong Tongpinhe road part, traditional single-unit microstrip line Wilkinson power divider can not meet the requirement in broadband.So in order to broadened bandwidth, three tunnels have employed the method for designing of more piece Chebyshev impedance transformer with frequency combiner.Select three joint Chebyshev impedance transformers can reach required bandwidth in the utility model.And in VHF frequency range, the Wilkinson power divider using microstrip line mode to make takes up space too large, is unfavorable for installing.So adopt the quarter-wave microstrip line in lamped element equivalence Wilkinson power divider, significantly reduce to make mixer overall volume.
Described matching network is serial inductor capacitance resonant circuit, a narrow passband can be formed and Out-of-band rejection is good after itself and load in series, utilize this characteristic can mate this mixer common port, the job stability of circuit can be ensured, prevent from producing between VHF and UHF frequency influencing each other, reduce the loss of mixer, improve mixer operating efficiency.
By reference to the accompanying drawings execution mode of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solutions of the utility model content, according to technical spirit of the present utility model, within spirit of the present utility model and principle, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection range all still belonging to technical solutions of the utility model.
Claims (6)
1. one kind comprises the mixer of three road VHF and a road UHF, it is characterized in that: comprise substrate, filter, three tunnels with frequency combiner and matching network, described filter, the three same frequency combiners in tunnel, matching network are all arranged on substrate, and matching network comprises the first matching network and the second matching network;
Described filter comprises the first filter, the second filter, the 3rd filter, the 4th filter;
Described three tunnels comprise three inputs, an output with frequency combiner;
One end of one end of described second filter, one end of the 3rd filter, the 4th filter is connected with three inputs of three tunnels with frequency combiner respectively, and described three tunnels are connected with one end of the second matching network with the output of frequency combiner;
One end of described first filter is connected with one end of the first matching network, and the other end of described first matching network is connected with the other end of the second matching network.
2. a kind of mixer comprising three road VHF and a road UHF as claimed in claim 1, is characterized in that: described first, second, third, fourth filter is LC band pass filter.
3. a kind of mixer comprising three road VHF and a road UHF as claimed in claim 1, is characterized in that: described first, second, third, fourth filter is the Chebyshev filter on five rank.
4. a kind of mixer comprising three road VHF and a road UHF as described in claim or 1 or 2 or 3, it is characterized in that: described second, 3rd, 4th filter construction is identical, include the first inductance, first electric capacity, second inductance, second electric capacity, 3rd inductance, 3rd electric capacity, 4th inductance, 4th electric capacity, 5th inductance, 5th electric capacity, one end of described first inductance is connected with one end of the first electric capacity, the other end of described first electric capacity respectively with one end of the second inductance, one end of second electric capacity, one end of 3rd inductance is connected, the other end of described second inductance, the equal ground connection of the other end of the second electric capacity,
The other end of described 3rd inductance is connected with one end of the 3rd electric capacity, the other end of described 3rd electric capacity is connected with one end of the 4th inductance, one end of the 4th electric capacity, one end of the 5th inductance respectively, the other end of described 4th inductance, the other end of the 4th electric capacity are connected equal ground connection, and the other end of described 5th inductance connects one end of the 5th electric capacity.
5. a kind of mixer comprising three road VHF and a road UHF as claimed in claim 1, it is characterized in that: described three tunnels comprise the 12 electric capacity with frequency combiner, 13 electric capacity, 14 electric capacity, 15 electric capacity, 16 electric capacity, 17 electric capacity, 18 electric capacity, 19 electric capacity, 20 electric capacity, 21 electric capacity, 22 electric capacity, 23 electric capacity, 12 inductance, 13 inductance, 14 inductance, 18 inductance, 19 inductance, 20 inductance, 25 inductance, 26 inductance, 27 inductance, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance,
One end of described 12 electric capacity is connected with one end of the 12 inductance, one end of the 16 electric capacity, one end of the 18 inductance, one end of the 25 inductance, one end of the 20 electric capacity respectively;
The other end of described 12 inductance is connected with one end of the 13 electric capacity, one end of the 13 inductance, one end of the first resistance respectively; The other end of described 13 inductance is connected with one end of the 14 electric capacity, one end of the 14 inductance, one end of the second resistance respectively; The other end of described 14 inductance is connected with one end of the 15 electric capacity, one end of the 3rd resistance respectively;
The other end of described 12 electric capacity, the other end of the 13 electric capacity, the other end of the 14 electric capacity, the equal ground connection of the other end of the 15 electric capacity;
The other end of described 18 inductance connects the other end of the first resistance, one end of the 19 inductance, one end of the 17 electric capacity, one end of the 4th resistance respectively, the other end of described 19 inductance connects the other end of the second resistance, one end of the 20 inductance, one end of the 5th resistance, one end of the 18 electric capacity respectively, and the other end of described 20 inductance connects the other end of the 3rd resistance, one end of the 19 electric capacity, one end of the 6th resistance respectively;
The other end of described 16 electric capacity, the other end of the 17 electric capacity, the other end of the 18 electric capacity, the equal ground connection of the other end of the 19 electric capacity;
The other end of described 25 inductance connects the other end of the 4th resistance, one end of the 21 electric capacity, one end of the 26 inductance respectively, the other end of described 26 inductance connects the other end of the 5th resistance, one end of the 27 inductance, one end of the 22 electric capacity respectively, the other end of described 27 inductance connects the other end of the 6th resistance, one end of the 23 electric capacity respectively
The other end of described 20 electric capacity, the other end of the 21 electric capacity, the other end of the 22 electric capacity, the equal ground connection of the other end of the 23 electric capacity.
6. a kind of mixer comprising three road VHF and a road UHF as described in claim 1 or 5, is characterized in that: described first matching network and the composition of the second matching network are the electric capacity and inductance of connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520263745.7U CN204516879U (en) | 2015-04-28 | 2015-04-28 | A kind of mixer comprising three road VHF and a road UHF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520263745.7U CN204516879U (en) | 2015-04-28 | 2015-04-28 | A kind of mixer comprising three road VHF and a road UHF |
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| Publication Number | Publication Date |
|---|---|
| CN204516879U true CN204516879U (en) | 2015-07-29 |
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|---|---|---|---|
| CN201520263745.7U Expired - Fee Related CN204516879U (en) | 2015-04-28 | 2015-04-28 | A kind of mixer comprising three road VHF and a road UHF |
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| CN (1) | CN204516879U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882658A (en) * | 2015-04-28 | 2015-09-02 | 南京信息工程大学 | Combiner including three paths of VHFs and one path of UHF |
| CN108432128A (en) * | 2016-01-05 | 2018-08-21 | 三菱电机株式会社 | Doherty amplifier |
| CN111162360A (en) * | 2020-01-07 | 2020-05-15 | 上海科技大学 | Dual-frequency band-pass response lumped element power divider with-/+ 45 DEG phase shift |
-
2015
- 2015-04-28 CN CN201520263745.7U patent/CN204516879U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882658A (en) * | 2015-04-28 | 2015-09-02 | 南京信息工程大学 | Combiner including three paths of VHFs and one path of UHF |
| CN108432128A (en) * | 2016-01-05 | 2018-08-21 | 三菱电机株式会社 | Doherty amplifier |
| CN108432128B (en) * | 2016-01-05 | 2021-08-06 | 三菱电机株式会社 | Doherty amplifier |
| CN111162360A (en) * | 2020-01-07 | 2020-05-15 | 上海科技大学 | Dual-frequency band-pass response lumped element power divider with-/+ 45 DEG phase shift |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20170428 |
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| CF01 | Termination of patent right due to non-payment of annual fee |