CN205160484U - Load impedance matching unit - Google Patents
Load impedance matching unit Download PDFInfo
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- CN205160484U CN205160484U CN201521031682.9U CN201521031682U CN205160484U CN 205160484 U CN205160484 U CN 205160484U CN 201521031682 U CN201521031682 U CN 201521031682U CN 205160484 U CN205160484 U CN 205160484U
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- port
- acoustic wave
- surface acoustic
- circuit unit
- inductance
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Abstract
The utility model discloses a load impedance matching unit belongs to the impedance match field. Utility model includes surface acoustic wave device adaptation seat, is connected with a port matching circuit unit in its one end, is connected with two matching circuit units of port at its other end, and a port matching circuit unit links to each other with first joint, connects at two matching circuit units of port and second to link to each other. The utility model discloses a regulation of four single -pole double -throw states among the the device constitutes the unmatch passageway that corresponds with the surface acoustic wave device that awaits measuring respectively and matches the passageway to the messenger is awaited measuring one step surface acoustic wave device and is accomplished load impedance and match. For prior art, the emergence of this condition has been avoided dismantling a plurality of hardware at whole in -process to can design different passive load impedance matching network respectively to two ports, the nimble processing makes the both ends mouth reach the impedance match central point simultaneously, reduces the back wave on the transmission line, has improved the transmission efficiency and the quality of surface acoustic wave signal.
Description
Technical field
The utility model belongs to impedance-matching art, particularly a kind of load impedance coalignment.
Background technology
Load impedance coupling and load impedance equal the characteristic impedance of transmission line, are to make high-frequency microwave signal all can with maximum power transfer to a kind of state of POL.Sound surface device exports as high frequency analog signals, the reflected wave on transmission line can be caused comparatively strong thus direct efficiency of transmission and the quality affecting signal when load impedance mismatch.
Carry out the method for load impedance coupling much for SAW (Surface Acoustic Wave) device at present, but all can not solve load matched problem very well:
First, what exist at present can not make its input and output two-port reach coupling about SAW (Surface Acoustic Wave) device load matched scheme mostly simultaneously, and now the connection transmission line place of two-port still exists larger reflected wave;
Secondly, existing SAW (Surface Acoustic Wave) device load matched aspect lacks coalignment and the matching scheme thereof of a system, and conventional method is repeatedly repeatedly dismantled hardware and measured contrast, makes to mate and expends larger time and energy.
Summary of the invention
In order to solve the problem of prior art, the utility model provides a kind of load impedance coalignment, and described load impedance coalignment, comprising:
SAW (Surface Acoustic Wave) device adapted seat, one end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port one match circuit unit, the other end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port two match circuit unit, described port one match circuit unit is connected with the first joint, is connected with the second joint at described port two match circuit unit;
Wherein, described SAW (Surface Acoustic Wave) device adapted seat is connected with described port one match circuit unit by the first single-pole double-throw switch (SPDT), and described SAW (Surface Acoustic Wave) device adapted seat is connected with described port two match circuit unit by the second single-pole double-throw switch (SPDT);
Be provided with the 3rd single-pole double-throw switch (SPDT) between described port one match circuit unit and described first joint, between described port two match circuit unit and described second joint, be provided with the 4th single-pole double-throw switch (SPDT).
Optionally, described SAW (Surface Acoustic Wave) device adapted seat, comprising:
Be provided with the In port be connected with acoustic wave device input pin to be measured in one end of described SAW (Surface Acoustic Wave) device adapted seat, be provided with the Out port be connected with acoustic wave device output pin to be measured at the other end of described SAW (Surface Acoustic Wave) device adapted seat.
Optionally, described port one match circuit unit, comprising:
Electric capacity C11, inductance L 11, inductance L 12;
Wherein, one end of described inductance L 11 is connected with one end of described electric capacity C11, the other end ground connection of described inductance L 11, one end of described inductance L 12 is connected with the other end of described electric capacity C11, the other end ground connection of described inductance L 12, one end of described electric capacity C11 is connected with described first single-pole double-throw switch (SPDT), and the other end of described electric capacity C11 is connected with described 3rd single-pole double-throw switch (SPDT).
Optionally, described port two match circuit unit, comprising:
Electric capacity C21, inductance L 21, inductance L 22;
Wherein, one end of described inductance L 21 and one end of described inductance L 22 are connected to one end of described electric capacity C21 jointly, the other end of described inductance L 21 is connected with described second single-pole double-throw switch (SPDT), the other end ground connection of described inductance L 22, the other end of described electric capacity C21 is connected with described 4th single-pole double-throw switch (SPDT).
The beneficial effect that the technical scheme that the utility model provides is brought is:
By the adjustment of four single-pole double-throw switch (SPDT) states in this device, form do not mate passage and mate passage corresponding with SAW (Surface Acoustic Wave) device to be measured respectively, thus make SAW (Surface Acoustic Wave) device one step to be measured complete load impedance coupling.Relative to prior art, avoid the generation of multiple hardware being dismantled to this situation in whole process, and different passive load impedance matching networks can be designed respectively for two ports, sweetly disposition makes two-port reach impedance matching central point simultaneously, reduce the reflected wave on transmission line, improve efficiency of transmission and the quality of surface acoustic wave signal.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the overall structure schematic diagram of a kind of load impedance coalignment that the utility model provides;
Fig. 2 is the electrical block diagram of a kind of load impedance coalignment that the utility model provides;
Fig. 3 is the structural representation of a kind of load impedance coalignment middle port one match circuit that the utility model provides;
Fig. 4 is the structural representation of a kind of load impedance coalignment middle port two match circuit that the utility model provides.
Embodiment
For making structure of the present utility model and advantage clearly, below in conjunction with accompanying drawing, structure of the present utility model is further described.
Embodiment one
The utility model provides a kind of load impedance coalignment, and described load impedance coalignment, comprising:
SAW (Surface Acoustic Wave) device adapted seat, one end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port one match circuit unit, the other end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port two match circuit unit, described port one match circuit unit is connected with the first joint, is connected with the second joint at described port two match circuit unit;
Wherein, described SAW (Surface Acoustic Wave) device adapted seat is connected with described port one match circuit unit by the first single-pole double-throw switch (SPDT), and described SAW (Surface Acoustic Wave) device adapted seat is connected with described port two match circuit unit by the second single-pole double-throw switch (SPDT);
Be provided with the 3rd single-pole double-throw switch (SPDT) between described port one match circuit unit and described first joint, between described port two match circuit unit and described second joint, be provided with the 4th single-pole double-throw switch (SPDT).
In force, the defect of matching status can not be reached in order to solve the SAW (Surface Acoustic Wave) device input port that exists in prior art and output port simultaneously, propose a kind of load impedance coalignment in the utility model, as shown in Figure 1, the detailed construction of this device is as follows:
The main body of this load impedance coalignment is SAW (Surface Acoustic Wave) device adapted seat, be connected to port one match circuit unit and port two match circuit unit at these adapted seat two ends, and port one match circuit unit is connected with the second joint with the first joint respectively with port two match circuit unit.
Wherein, between port one match circuit unit and SAW (Surface Acoustic Wave) device adapted seat, be provided with the first single-pole double-throw switch (SPDT) S1, between port two match circuit unit and SAW (Surface Acoustic Wave) device adapted seat, be provided with the second single-pole double-throw switch (SPDT) S2.Between port one match circuit unit and described first joint, be provided with the 3rd single-pole double-throw switch (SPDT) S3, between port two match circuit unit and described second joint, be provided with the 4th single-pole double-throw switch (SPDT) S4.
Concrete, in fig. 2, when single-pole double-throw switch (SPDT) S1 be positioned at S11 end, single-pole double-throw switch (SPDT) S2 be positioned at S21 end, single-pole double-throw switch (SPDT) S3 be positioned at S31 and single-pole double-throw switch (SPDT) S4 be positioned at S41 end time, the first joint, SAW (Surface Acoustic Wave) device are formed with the second joint interface channel does not mate passage;
When single-pole double-throw switch (SPDT) S1 be positioned at S12 end, single-pole double-throw switch (SPDT) S2 is positioned at S22 end, single-pole double-throw switch (SPDT) S3 be positioned at S32 and single-pole double-throw switch (SPDT) S4 be positioned at S42 end time, the first joint, port one match circuit unit, SAW (Surface Acoustic Wave) device, port two match circuit unit form with the second joint interface channel and mate passage.
Owing to devising four single-pole double-throw switch (SPDT)s in whole load impedance coalignment, by adjusting the concrete connection status of four single-pole double-throw switch (SPDT)s, can make when carrying out load impedance coupling, the order SAW (Surface Acoustic Wave) device to be measured be arranged in SAW (Surface Acoustic Wave) device adapted seat accesses respectively does not mate passage and coupling passage, different passive impedance matching networks can also be built for port one and port two, finally make port one and port two reach load impedance match point, on the transmission line of minimizing two ends, information source is to the reflected wave of Load transportation signal simultaneously.
The utility model provides a kind of load impedance coalignment, comprise SAW (Surface Acoustic Wave) device adapted seat, and the port one match circuit unit be attached thereto and port two match circuit unit, by the adjustment of four single-pole double-throw switch (SPDT) states in this device, form do not mate passage and mate passage corresponding with SAW (Surface Acoustic Wave) device to be measured respectively, thus make SAW (Surface Acoustic Wave) device one step to be measured complete load impedance coupling.Relative to prior art, avoid the generation of multiple hardware being dismantled to this situation in whole process, and different passive load impedance matching networks can be designed respectively for two ports, sweetly disposition makes two-port reach impedance matching central point simultaneously, reduce the reflected wave on transmission line, improve efficiency of transmission and the quality of surface acoustic wave signal.
Optionally, described SAW (Surface Acoustic Wave) device adapted seat, comprising:
Be provided with the In port be connected with acoustic wave device input pin to be measured in one end of described SAW (Surface Acoustic Wave) device adapted seat, be provided with the Out port be connected with acoustic wave device output pin to be measured at the other end of described SAW (Surface Acoustic Wave) device adapted seat.
In force, SAW (Surface Acoustic Wave) device adapted seat In port accesses SAW (Surface Acoustic Wave) device input pin to be measured, and SAW (Surface Acoustic Wave) device adapted seat Out port accesses SAW (Surface Acoustic Wave) device output pin to be measured.
By above-mentioned connection, SAW (Surface Acoustic Wave) device to be measured is accessed whole load impedance coalignment by SAW (Surface Acoustic Wave) device adapted seat.
Optionally, described port one match circuit unit, comprising:
Electric capacity C11, inductance L 11, inductance L 12;
Wherein, one end of described inductance L 11 is connected with one end of described electric capacity C11, the other end ground connection of described inductance L 11, one end of described inductance L 12 is connected with the other end of described electric capacity C11, the other end ground connection of described inductance L 12, one end of described electric capacity C11 is connected with described first single-pole double-throw switch (SPDT), and the other end of described electric capacity C11 is connected with described 3rd single-pole double-throw switch (SPDT).
In force, the details of port one match circuit unit as shown in Figure 3, one end of electric capacity C11 is connected to the S32 end in the 3rd single-pole double-throw switch (SPDT) S3, the other end of electric capacity C11 is connected to the S12 end in the first single-pole double-throw switch (SPDT) S1, and one end of inductance L 11 is connected with one end of described electric capacity C11, the other end ground connection of inductance L 11, inductance L 12 is similar with it, its one end is connected with the other end of described electric capacity C11, the other end ground connection of inductance L 12.
The said structure of port one match circuit unit is also called pi-network.
Optionally, described port two match circuit unit, comprising:
Electric capacity C21, inductance L 21, inductance L 22;
Wherein, one end of described inductance L 21 and one end of described inductance L 22 are connected to one end of described electric capacity C21 jointly, the other end of described inductance L 21 is connected with described second single-pole double-throw switch (SPDT), the other end ground connection of described inductance L 22, the other end of described electric capacity C21 is connected with described 4th single-pole double-throw switch (SPDT).
In force, the details of port two match circuit unit as shown in Figure 4, one end of inductance L 21 and one end of inductance L 22 are connected to one end of electric capacity C21 jointly, the other end of inductance L 21 is then connected to the S22 end in the second single-pole double-throw switch (SPDT) S2, the other end ground connection of inductance L 21, the other end of electric capacity C21 is connected to the S42 end in the 4th single-pole double-throw switch (SPDT) S4.
The said structure of port two match circuit unit is also called T-shaped circuit.
The utility model provides a kind of load impedance coalignment, comprise SAW (Surface Acoustic Wave) device adapted seat, and the port one match circuit unit be attached thereto and port two match circuit unit, by the adjustment of four single-pole double-throw switch (SPDT) states in this device, form do not mate passage and mate passage corresponding with SAW (Surface Acoustic Wave) device to be measured respectively, thus make SAW (Surface Acoustic Wave) device one step to be measured complete load impedance coupling.Relative to prior art, avoid the generation of multiple hardware being dismantled to this situation in whole process, and different passive load impedance matching networks can be designed respectively for two ports, sweetly disposition makes two-port reach impedance matching central point simultaneously, reduce the reflected wave on transmission line, improve efficiency of transmission and the quality of surface acoustic wave signal.
It should be noted that: a kind of load impedance coalignment that above-described embodiment provides carries out the embodiment of load impedance coupling, only as the explanation in actual applications of this coalignment, can also use in other application scenarioss according to actual needs and by above-mentioned coalignment, its specific implementation process is similar to above-described embodiment, repeats no more here.
Each sequence number in above-described embodiment, just to describing, not to represent in the assembling of each parts or use procedure to obtain sequencing.
The foregoing is only exemplary embodiments of the present utility model; not in order to limit this utility model; all within this spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within this protection range of the present utility model.
Claims (4)
1. a load impedance coalignment, is characterized in that, described load impedance coalignment, comprising:
SAW (Surface Acoustic Wave) device adapted seat, one end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port one match circuit unit, the other end of described SAW (Surface Acoustic Wave) device adapted seat is connected with port two match circuit unit, described port one match circuit unit is connected with the first joint, is connected with the second joint at described port two match circuit unit;
Wherein, described SAW (Surface Acoustic Wave) device adapted seat is connected with described port one match circuit unit by the first single-pole double-throw switch (SPDT), and described SAW (Surface Acoustic Wave) device adapted seat is connected with described port two match circuit unit by the second single-pole double-throw switch (SPDT);
Be provided with the 3rd single-pole double-throw switch (SPDT) between described port one match circuit unit and described first joint, between described port two match circuit unit and described second joint, be provided with the 4th single-pole double-throw switch (SPDT).
2. load impedance coalignment according to claim 1, is characterized in that, described SAW (Surface Acoustic Wave) device adapted seat, comprising:
Be provided with the In port be connected with acoustic wave device input pin to be measured in one end of described SAW (Surface Acoustic Wave) device adapted seat, be provided with the Out port be connected with acoustic wave device output pin to be measured at the other end of described SAW (Surface Acoustic Wave) device adapted seat.
3. load impedance coalignment according to claim 1, is characterized in that, described port one match circuit unit, comprising:
Electric capacity C11, inductance L 11, inductance L 12;
Wherein, one end of described inductance L 11 is connected with one end of described electric capacity C11, the other end ground connection of described inductance L 11, one end of described inductance L 12 is connected with the other end of described electric capacity C11, the other end ground connection of described inductance L 12, one end of described electric capacity C11 is connected with described first single-pole double-throw switch (SPDT), and the other end of described electric capacity C11 is connected with described 3rd single-pole double-throw switch (SPDT).
4. load impedance coalignment according to claim 1, is characterized in that, described port two match circuit unit, comprising:
Electric capacity C21, inductance L 21, inductance L 22;
Wherein, one end of described inductance L 21 and one end of described inductance L 22 are connected to one end of described electric capacity C21 jointly, the other end of described inductance L 21 is connected with described second single-pole double-throw switch (SPDT), the other end ground connection of described inductance L 22, the other end of described electric capacity C21 is connected with described 4th single-pole double-throw switch (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521031682.9U CN205160484U (en) | 2015-12-11 | 2015-12-11 | Load impedance matching unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521031682.9U CN205160484U (en) | 2015-12-11 | 2015-12-11 | Load impedance matching unit |
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| Publication Number | Publication Date |
|---|---|
| CN205160484U true CN205160484U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521031682.9U Expired - Fee Related CN205160484U (en) | 2015-12-11 | 2015-12-11 | Load impedance matching unit |
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| CN (1) | CN205160484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391416A (en) * | 2015-12-11 | 2016-03-09 | 长安大学 | Load impedance matching device and matching method |
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2015
- 2015-12-11 CN CN201521031682.9U patent/CN205160484U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391416A (en) * | 2015-12-11 | 2016-03-09 | 长安大学 | Load impedance matching device and matching method |
| CN105391416B (en) * | 2015-12-11 | 2018-08-21 | 长安大学 | A kind of load impedance coalignment and matching process |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20181211 |