CN203491995U - Microwave single-pole double-throw switch employing common terminal feeding without separate control and powering - Google Patents
Microwave single-pole double-throw switch employing common terminal feeding without separate control and powering Download PDFInfo
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- CN203491995U CN203491995U CN201320627306.0U CN201320627306U CN203491995U CN 203491995 U CN203491995 U CN 203491995U CN 201320627306 U CN201320627306 U CN 201320627306U CN 203491995 U CN203491995 U CN 203491995U
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Abstract
The utility model discloses a microwave single-pole double-throw switch employing common terminal feeding without separate control and powering. The switch comprises a common terminal RFin, a first gating branch and a second gating branch. A shell of one end of the common terminal RFin is grounded, and the other end is parallelly connected between the first gating branch and the second gating branch. The first gating branch comprises a first microstrip line L1, a second microstrip line L2 and a first pin diode VD1. One end of the L1 is connected to the RFin, and the other end is connected to an RFout1. One end of the L2 is parallelly connected between the L1 and the RFout1, and the other end is connected to the anode of the VD1, the cathode of which is grounded. The second gating branch comprises a third microstrip line L3 and a second pin diode VD2. One end of the L3 is connected to the RFin, and the other end to an RFout2. The anode of the VD2 is parallelly connected between the L3 and the RFout2, and the cathode is grounded. The switch employs a common terminal feeding method and thus can be fed through a radio frequency cable to accomplish switch gating functions, with no need for separate control and powering. The switch is suitable for base stations, tower tops and other situations where it is inconvenient for control and powering.
Description
Technical field
The utility model relates to a kind of radio-frequency (RF) switch, particularly relate to a kind ofly adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up.
Background technology
Microwave electron switch is the conventional device in microwave telecommunication system, is used for controlling the channel switching of microwave signal.It comprises a public port and a plurality of separate port, generally also needs to have independently Power supply and control port.Microwave electron switch adopts the various combination mode of PIN diode to realize conventionally, and traditional microwave single-pole double-throw switch (SPDT) is mainly divided into tandem, parallel and series-parallel three kinds of forms.
The circuit theory diagrams of conventional tandem single-pole double-throw switch (SPDT) as shown in Figure 1, add positive current when controlling 1, when control 2 adds negative voltage, and PIN diode VD1 conducting, VD2 cut-off, corresponding passage RFin-RFout1 conducting, passage RFin-RFout2 cut-off; When controlling 2, add positive current, when control 1 adds negative voltage, PIN diode VD2 conducting, VD1 cut-off, corresponding passage RFin-RFout2 conducting, passage RFin-RFout1 cut-off.The feature of conventional tandem single-pole double-throw switch (SPDT) is the impact that radio-frequency channel is not subject to frequency, and bandwidth of operation is very wide.But its shortcoming is the rising along with frequency, and its insertion loss increases gradually, and isolation reduces gradually.
The circuit theory diagrams of the parallel single-pole double-throw switch (SPDT) of tradition as shown in Figure 2, add negative voltage when controlling 1, when control 2 adds positive current, and PIN diode VD1 cut-off, VD2 conducting, corresponding passage RFin-RFout1 conducting, passage RFin-RFout2 cut-off; When controlling 2, add negative voltage, when control 1 adds positive current, PIN diode VD2 cut-off, VD1 conducting, corresponding passage RFin-RFout2 conducting, passage RFin-RFout1 cut-off.The shortcoming of the parallel single-pole double-throw switch (SPDT) of tradition is the impact that radio-frequency channel is subject to 1/4 λ, and bandwidth of operation is very narrow, and along with the rising of frequency, insertion loss becomes greatly gradually, and in the centre frequency of work, isolation is maximum; Depart from centre frequency far away, isolation is lower.
Traditional tandem, parallel, series-parallel single-pole double-throw switch (SPDT) all can only be applicable to the convenient connection such as pcb board, cabinet, rack and control, and have again the occasion of electric power system.Under some special occasions, both needed switch to carry out the switching controls of channel, there is no again power supply and control, as the antenna on top, base station, between antenna, also need to select, yet control terminal is conventionally apart from tens meters of base stations, only has radio frequency cable to connect base station to control terminal.At this moment just need to design one and meet above-mentioned requirements, not need the microwave switch of controlling separately and powering up.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of be applicable to the controls such as base station, high building top and power up the employing common port feed of all inconvenient occasion, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, can pass through radio frequency cable feed, insertion loss is low, isolation is high.
The purpose of this utility model is achieved through the following technical solutions: a kind ofly adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it comprises common port RFin, the first gating branch road and the second gating branch road, one end earthing of casing of common port RFin, the other end is parallel between the first gating branch road and the second gating branch road;
The first described gating branch road comprises the first microstrip line L1, the second microstrip line L2 and the first PIN diode VD1, one end of the first microstrip line L1 is connected with common port RFin, the other end is connected with the first output RFout1, one end of the second microstrip line L2 is parallel between the first microstrip line L1 and the first output RFout1, the other end of the second microstrip line L2 is connected with the positive pole of the first PIN diode VD1, the minus earth of the first PIN diode VD1;
The second described gating branch road comprises the 3rd microstrip line L3 and the second PIN diode VD2, one end of the 3rd microstrip line L3 is connected with common port RFin, the other end is connected with the second output RFout2, the positive pole of the second PIN diode VD2 is parallel between the 3rd microstrip line L3 and the second output RFout2, the minus earth of the second PIN diode VD2.
As further improvement of the utility model, between the first described microstrip line L1 and the first output RFout1, be in series with the first filter capacitor C1.
As further improvement of the utility model, between the 3rd described microstrip line L3 and the second output RFout2, be in series with the second filter capacitor C2.
Further, the first described microstrip line L1, the second microstrip line L2 and the 3rd microstrip line L3 are 1/4 λ microstrip line.
The beneficial effects of the utility model are:
1) adopt common port feeding classification, can complete switching gate function by radio frequency cable feed, without controlling separately and powering up, go for the controls such as base station, high building top and power up all inconvenient occasion;
2) insertion loss is low, standing-wave ratio is little, isolation is high;
3) bear power large.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of conventional tandem single-pole double-throw switch (SPDT);
Fig. 2 is the circuit theory diagrams of traditional parallel single-pole double-throw switch (SPDT);
Fig. 3 is the circuit theory diagrams of the utility model single-pole double-throw switch (SPDT).
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 3, a kind ofly adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it comprises common port RFin, the first gating branch road and the second gating branch road, one end earthing of casing of common port RFin, the other end is parallel between the first gating branch road and the second gating branch road.
The first described gating branch road comprises the first microstrip line L1, the second microstrip line L2 and the first PIN diode VD1, one end of the first microstrip line L1 is connected with common port RFin, the other end is connected with the first output RFout1, the first output RFout1 ground connection, one end of the second microstrip line L2 is parallel between the first microstrip line L1 and the first output RFout1, the other end of the second microstrip line L2 is connected with the positive pole of the first PIN diode VD1, the minus earth of the first PIN diode VD1.
The second described gating branch road comprises the 3rd microstrip line L3 and the second PIN diode VD2, one end of the 3rd microstrip line L3 is connected with common port RFin, the other end is connected with the second output RFout2, the second output RFout2 ground connection, the positive pole of the second PIN diode VD2 is parallel between the 3rd microstrip line L3 and the second output RFout2, the minus earth of the second PIN diode VD2.
As preferably, between the first microstrip line L1 and the first output RFout1, be in series with the first filter capacitor C1; Between the 3rd microstrip line L3 and the second output RFout2, be in series with the second filter capacitor C2.
The first described microstrip line L1, the second microstrip line L2 and the 3rd microstrip line L3 are 1/4 λ microstrip line.
The utility model is compared with conventional tandem single-pole double-throw switch (SPDT), traditional parallel single-pole double-throw switch (SPDT), and its performance comparison is as shown in table 1:
Table 1
The above is only preferred implementation of the present utility model, be to be understood that the utility model is not limited to disclosed form herein, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can, in contemplated scope described herein, by technology or the knowledge of above-mentioned instruction or association area, change.And the change that those skilled in the art carry out and variation do not depart from spirit and scope of the present utility model, all should be in the protection range of the utility model claims.
Claims (4)
- One kind adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it is characterized in that: it comprises common port RFin, the first gating branch road and the second gating branch road, one end earthing of casing of common port RFin, the other end is parallel between the first gating branch road and the second gating branch road;The first described gating branch road comprises the first microstrip line L1, the second microstrip line L2 and the first PIN diode VD1, one end of the first microstrip line L1 is connected with common port RFin, the other end is connected with the first output RFout1, one end of the second microstrip line L2 is parallel between the first microstrip line L1 and the first output RFout1, the other end of the second microstrip line L2 is connected with the positive pole of the first PIN diode VD1, the minus earth of the first PIN diode VD1;The second described gating branch road comprises the 3rd microstrip line L3 and the second PIN diode VD2, one end of the 3rd microstrip line L3 is connected with common port RFin, the other end is connected with the second output RFout2, the positive pole of the second PIN diode VD2 is parallel between the 3rd microstrip line L3 and the second output RFout2, the minus earth of the second PIN diode VD2.
- 2. according to claim 1ly a kind ofly adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it is characterized in that: between the first described microstrip line L1 and the first output RFout1, be in series with the first filter capacitor C1.
- 3. according to claim 1ly a kind ofly adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it is characterized in that: between the 3rd described microstrip line L3 and the second output RFout2, be in series with the second filter capacitor C2.
- According to a kind of described in any one in claim 1～3 adopt common port feed, without the microwave single-pole double-throw switch (SPDT) of controlling separately and powering up, it is characterized in that: the first described microstrip line L1, the second microstrip line L2 and the 3rd microstrip line L3 are 1/4 λ microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320627306.0U CN203491995U (en) | 2013-10-11 | 2013-10-11 | Microwave single-pole double-throw switch employing common terminal feeding without separate control and powering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320627306.0U CN203491995U (en) | 2013-10-11 | 2013-10-11 | Microwave single-pole double-throw switch employing common terminal feeding without separate control and powering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491995U true CN203491995U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320627306.0U Withdrawn - After Issue CN203491995U (en) | 2013-10-11 | 2013-10-11 | Microwave single-pole double-throw switch employing common terminal feeding without separate control and powering |
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| Country | Link |
|---|---|
| CN (1) | CN203491995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546132A (en) * | 2013-10-11 | 2014-01-29 | 成都九华圆通科技发展有限公司 | Microwave single-pole double-throw switch having a function of common feed and requiring no independent control or powering up |
-
2013
- 2013-10-11 CN CN201320627306.0U patent/CN203491995U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546132A (en) * | 2013-10-11 | 2014-01-29 | 成都九华圆通科技发展有限公司 | Microwave single-pole double-throw switch having a function of common feed and requiring no independent control or powering up |
| CN103546132B (en) * | 2013-10-11 | 2016-01-27 | 成都九华圆通科技发展有限公司 | A kind ofly adopt common port feed, microwave single-pole double-throw switch (SPDT) without the need to controlling separately and powering up |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20160127 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20160127 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |