CN112234327A - Waveguide microwave switch - Google Patents
Waveguide microwave switch Download PDFInfo
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- CN112234327A CN112234327A CN202010976161.XA CN202010976161A CN112234327A CN 112234327 A CN112234327 A CN 112234327A CN 202010976161 A CN202010976161 A CN 202010976161A CN 112234327 A CN112234327 A CN 112234327A
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- microwave switch
- radio frequency
- protective film
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- 230000001681 protective effect Effects 0.000 claims abstract description 42
- 239000000565 sealant Substances 0.000 claims description 13
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 239000012528 membrane Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 13
- 238000003780 insertion Methods 0.000 description 10
- 230000037431 insertion Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
- H01P1/12—Auxiliary devices for switching or interrupting by mechanical chopper
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Abstract
The invention provides a waveguide microwave switch, comprising: a radio frequency device and a protective film; the position of the waveguide channel of the radio frequency device is provided with a limiting structure for limiting the protective film in the channel direction; the protective film is fixedly connected with the limiting structure so as to seal the waveguide channel. The invention can effectively eliminate window resonance, expand the working frequency of the waveguide switch, and has simple structure realization form and easy processing.
Description
Technical Field
The invention relates to the technical field of microwave products, in particular to a waveguide microwave switch.
Background
The microwave switches are an indispensable component in satellite payloads, almost appear in satellite payloads of all categories such as communication, navigation, data transmission, measurement and control, and are large in number.
At present, a mechanical waveguide microwave switch manufactured by manufacturers is composed of a radio frequency device, a driving device and a control circuit, wherein the control circuit sends a control signal to the driving device, the driving device drives a radio frequency rotating shaft to move in the circumferential direction, and a corresponding radio frequency channel is conducted. The radio frequency device of the mechanical waveguide microwave switch bears the task of transmitting radio frequency signals and is an important component of the microwave switch, the radio frequency device consists of a rotating shaft and a base, and a waveguide port of the radio frequency device is an important external interface of the microwave switch; in order to avoid the risks of switching failure and radio frequency channel discharge of the switch caused by dust, excess materials and the like entering the switch from the waveguide port, a dust-proof window is designed on the waveguide port of the traditional mechanical waveguide switch.
In the prior art, a waveguide port pressing sheet is usually added to a waveguide port of a radio frequency device, and the waveguide port pressing sheet is covered by a protective film to seal the waveguide port, and this way may cause in-band clutter, which may further cause in-band standing wave and insertion loss performance degradation, and reduce the operating bandwidth of the microwave switch.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, and a waveguide microwave switch is provided.
In order to solve the above technical problem, an embodiment of the present invention provides a waveguide microwave switch, including: a radio frequency device and a protective film; wherein,
a limiting structure for limiting the protective film in the channel direction is arranged at a position associated with a waveguide channel of the radio frequency device;
the protective film is fixedly connected with the limiting structure so as to seal the waveguide channel.
Optionally, the waveguide microwave switch further comprises: a control circuit and a driving device, wherein,
one end of the driving device is connected with the control circuit, and the other end of the driving device is connected with the radio frequency device;
the control circuit is configured to generate a control signal and send the control signal to the driving device;
the driving device is configured to receive the control signal and drive the radio frequency device to rotate in the circumferential direction according to the control signal;
the radio frequency device is configured to transmit radio frequency signals during the rotation.
Optionally, the radio frequency device comprises a spindle and a base, wherein,
one end of the rotating shaft is connected with the driving device;
the base is arranged at the other end of the rotating shaft and is fixedly connected with the rotating shaft so as to support the rotating shaft.
Optionally, the limiting structure is a step-shaped limiting structure.
Optionally, the waveguide channel comprises a first waveguide port near the outer side,
and a step-shaped limiting structure with an empty center is arranged at a position in the waveguide channel and away from the first preset distance of the first waveguide port.
Optionally, the waveguide channel comprises a second waveguide port near the inner side,
and a step-shaped limiting structure with an empty center is arranged at a position in the waveguide channel and away from a second preset distance of the second waveguide port.
Optionally, the limiting structure is a groove-shaped limiting structure.
Optionally, the waveguide channel comprises a first waveguide port near the outer side,
two groove-shaped limiting structures are arranged at the position, which is away from the first waveguide port by a third preset distance, in the waveguide channel;
and the connecting plane of the two groove-shaped limiting structures is parallel to the cross section of the waveguide channel.
Optionally, the waveguide channel comprises a second waveguide port near the inner side,
two groove-shaped limiting structures are arranged at the position, away from the fourth preset distance of the second waveguide port, in the waveguide channel;
and the connecting plane of the two groove-shaped limiting structures is parallel to the cross section of the waveguide channel.
Optionally, the protective film is a film made of polyimide.
Optionally, the protective film is fixedly connected with the limiting structure through a sealant.
Compared with the prior art, the invention has the advantages that:
according to the embodiment of the invention, the limiting structure is arranged at the position related to the wave channel to limit the protective film, and the traditional waveguide port pressing sheet is abandoned.
Drawings
Fig. 1 is a schematic structural diagram of a waveguide microwave switch according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dustproof device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another dustproof device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another dustproof device provided in the embodiment of the present invention;
fig. 5 is a schematic diagram of a measured straight channel standing wave curve according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a straight channel insertion loss actual measurement curve according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a curved channel standing wave actual measurement curve according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an actual insertion loss measurement curve of a curved channel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, which shows a schematic structural diagram of a waveguide microwave switch according to an embodiment of the present invention, as shown in fig. 1, the waveguide microwave switch may include a radio frequency device 10 and a protective film 4,
the limiting structure 3 for limiting the protective film in the channel direction is arranged at the position related to the waveguide channel of the radio frequency device, and the protective film 4 can be fixedly connected with the limiting structure 3 to seal the waveguide channel.
In specific implementation, the protective film 4 and the limiting structure 3 can be fixedly connected through sealant to realize the sealing of the waveguide channel.
According to the embodiment of the invention, the limiting structure is arranged at the position related to the waveguide channel, and the waveguide channel is sealed through the protective film, compared with the traditional dustproof window arrangement mode, a waveguide port pressing sheet is abandoned, and a new protective film fixing mode is adopted.
In a specific implementation of the present invention, the waveguide microwave switch may further include: a control circuit 1 and a drive means 2, wherein,
the control circuit 1 may be configured to generate a control signal and transmit the control signal to the driving device in the case of entering the operating state.
The driving device 2 may be configured to receive the control signal sent by the control circuit 1, and drive the artifact device to rotate in the circumferential direction according to the control signal.
The radio frequency device may be configured to transmit a radio frequency signal during the rotation. The control circuit and the driving device are both of the conventional structure, and the embodiment of the invention is not described herein again.
In another embodiment of the present invention, the rf device may further include a rotating shaft and a base (not shown in the figure), wherein one end of the rotating shaft is connected to the driving device, and the rotating shaft may be driven to rotate in the circumferential direction during the rotation of the driving device. The base is arranged at the other end of the rotating shaft and is fixedly connected with the rotating shaft so as to support the rotating shaft, the driving device and the control circuit.
In this embodiment, the limiting structure may be a step-shaped limiting structure, and specifically, the following specific implementation manner may be described in detail.
In a specific implementation manner of the present invention, as shown in fig. 1 and 4, the limiting structure may be a stepped limiting structure, such as the stepped limiting structure 3 in fig. 1 and the stepped limiting structure 7 in fig. 4.
The waveguide channel may include a first waveguide port near the outer side and a second waveguide port near the inner side.
When the limiting structure is a step-shaped limiting structure, a step-shaped limiting structure with an empty center can be arranged at a position away from a first preset distance of the first waveguide port in the waveguide channel, as shown in fig. 1, a step-shaped limiting structure 3 can be arranged at an external port of the waveguide channel, the protective film 4 can be limited, when the protective film 4 is fixedly connected with the limiting structure 3, the sealant can be coated on the edge of the protective film 4, and one side coated with the sealant moves to the limiting structure 3, so that the protective film 4 is fixedly connected with the limiting structure 3.
A step-shaped limiting structure with a hollow center may also be arranged at a position of the waveguide channel at a second preset distance from the second waveguide port, as shown in fig. 4, a step-shaped limiting structure 7 may be arranged at an inner diameter interface of the waveguide channel to limit the protective film 4. When the protective film 4 is fixedly connected with the limiting structure 7, the sealant can be coated on the edge of the protective film 4, and one side coated with the sealant moves to the limiting structure 7, so that the protective film 4 is fixedly connected with the limiting structure 7.
In this embodiment, the limiting structure may be a groove-shaped limiting structure, and specifically, the following detailed description may be provided in conjunction with the following specific implementation manner.
In another embodiment of the present invention, as shown in fig. 2 and 3, the limiting structure may be a groove-shaped limiting structure, such as the groove-shaped limiting structure 5 in fig. 2 and the groove-shaped limiting structure 6 in fig. 3.
When the limiting structure is a groove-shaped limiting structure, two groove-shaped limiting structures can be arranged at a position in the waveguide channel away from a third preset distance of the first waveguide port, wherein a connecting plane of the two groove-shaped limiting structures is parallel to a cross section of the waveguide channel, as shown in fig. 2, two groove-shaped limiting structures 5 can be arranged at an external interface of the waveguide channel, namely two grooves are arranged at opposite positions of the waveguide channel to limit the protective film 4, when the protective film 4 is fixedly connected with the limiting structures 5, sealant can be coated on the edge of the protective film 4, one side of the coated sealant moves towards the limiting structures 5, and when the protective film 4 is moved into the groove-shaped limiting structures 5, the protective film 4 can be fixedly connected with the limiting structures 3 through the sealant.
Two groove-shaped limiting structures may also be disposed at a position in the waveguide channel away from the fourth preset distance of the second waveguide port, as shown in fig. 3, two groove-shaped limiting structures 6 (two grooves disposed at opposite positions of the wave channel shown in fig. 3) may be disposed at the inner diameter interface of the waveguide channel, wherein a connection plane of the two groove-shaped limiting structures is parallel to the cross section of the waveguide channel, so as to limit the protective film 4. When the protective film 4 is fixedly connected with the limiting structure 6, the sealant can be coated on the edge of the protective film 4, one side coated with the sealant moves towards the limiting structure 6, and when the protective film 4 is moved into the groove-shaped limiting structure 6, the protective film 4 can be fixedly connected with the limiting structure 6 through the sealant.
It can be understood that, in the above-mentioned scheme, numerical values of the first preset distance, the second preset distance, the third preset distance, and the fourth preset distance may be the same or different, and specifically, may be determined according to a service requirement, which is not limited in this embodiment.
It should be understood that the two types of limiting structures mentioned in the embodiments of the present invention are implemented by providing an internal interface or an external interface to limit the protective film, and on this basis, the values of the first preset distance, the second preset distance, the third preset distance and the fourth preset distance should be less than half of the length of the waveguide channel.
In this embodiment, the protection film may be a film made of polyimide, and certainly, in a specific implementation, the protection film may also be made of other materials, and specifically, the protection film may be determined according to business requirements, which is not limited in this embodiment.
The technical effects of the protective film fixing method provided by the embodiment of the invention are described in the following with experiments.
Experiments prove that the insertion loss of the waveguide microwave switch in the prior art is remarkably reduced within the range of 37-39Hz in the working frequency band no matter a straight channel or a bent channel, the actual measurement is about 2-3dB, and the phenomenon exists on the transmission performance of the straight channel and the bent channel at the same time and is caused by the clutter excited at a dustproof window.
By adopting the structure, the invention designs the BJ400 waveguide switch, and the specific size of the step surface of the waveguide port is as follows: the wide side of the waveguide is 6.8mm, and the narrow side of the waveguide is 3.3 mm. The test results may be as shown in fig. 5 to 8:
referring to fig. 5, a schematic diagram of an actual measurement curve of a straight channel standing wave provided by an embodiment of the present invention is shown, as shown in fig. 5, when a step-shaped limiting structure is adopted, the curve is continuous in a frequency band range of 37 to 42.5GHz, the maximum value of the standing wave is 1.34, and there is no curve abnormality caused by resonance.
Referring to fig. 6, a schematic diagram of an actual measurement curve of the straight channel insertion loss provided by the embodiment of the present invention is shown, as shown in fig. 6, when a step-shaped limiting structure is adopted, the curve is continuous in a frequency band range of 37 to 42.5GHz, the maximum value of the insertion loss is-0.28 dB, the insertion loss fluctuates by 0.15dB, and there is no curve abnormality caused by resonance.
Referring to fig. 7, a schematic diagram of an actual measurement curve of a standing wave in a curved channel according to an embodiment of the present invention is shown, as shown in fig. 7, when a groove-shaped limiting structure is adopted, the curve is continuous in a frequency band range of 37 to 42.5GHz, a maximum value of the standing wave is 1.13, and there is no curve abnormality caused by resonance.
Referring to fig. 8, a schematic diagram of an actual measurement curve for curved channel query provided by an embodiment of the present invention is shown, and as shown in fig. 8, when a groove-shaped limiting structure is adopted, a curve is continuous in a frequency band range of 37 to 42.5GHz, an insertion loss maximum value is-0.22 dB, an insertion loss fluctuation is 0.14dB, and there is no curve abnormality caused by resonance.
In summary, after the waveguide microwave switch provided by the embodiment of the invention is adopted, the resonant frequency in the switch working frequency band completely disappears; and when the traditional dustproof window mode is adopted, resonance exists near 37.8GHz, the insertion loss is-2.3 dB, the maximum value of standing wave is 1.63(-12.352dB), and the in-band resonance seriously influences the in-band transmission characteristic. The waveguide microwave switch provided by the embodiment of the invention has a remarkable improvement effect, and the working frequency of the waveguide switch can be 37-42.5 GHz. .
According to the waveguide microwave switch provided by the embodiment of the invention, the limiting structure is arranged at the position related to the wave channel to limit the protective film, and the traditional waveguide port pressing sheet is abandoned.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (11)
1. A waveguide microwave switch, characterized in that it comprises: a radio frequency device and a protective film; wherein,
a limiting structure for limiting the protective film in the channel direction is arranged at a position associated with a waveguide channel of the radio frequency device;
the protective film is fixedly connected with the limiting structure so as to seal the waveguide channel.
2. The waveguide microwave switch of claim 1 further comprising: a control circuit and a driving device, wherein,
one end of the driving device is connected with the control circuit, and the other end of the driving device is connected with the radio frequency device;
the control circuit is configured to generate a control signal and send the control signal to the driving device when entering a working state;
the driving device is configured to receive the control signal and drive the radio frequency device to rotate in the circumferential direction according to the control signal;
the radio frequency device is configured to transmit radio frequency signals during the rotation.
3. The waveguide microwave switch of claim 2, wherein the radio frequency device includes a shaft and a base, wherein,
one end of the rotating shaft is connected with the driving device;
the base is arranged at the other end of the rotating shaft and is fixedly connected with the rotating shaft so as to support the rotating shaft.
4. A waveguide microwave switch as claimed in claim 1, in which the limit formation is a stepped limit formation.
5. A waveguide microwave switch according to claim 4, characterized in that the waveguide channel comprises a first waveguide port near the outside,
and a step-shaped limiting structure with an empty center is arranged at a position in the waveguide channel and away from the first preset distance of the first waveguide port.
6. A waveguide microwave switch according to claim 4, characterized in that the waveguide channel comprises a second waveguide port near the inner side,
and a step-shaped limiting structure with an empty center is arranged at a position in the waveguide channel and away from a second preset distance of the second waveguide port.
7. A waveguide microwave switch according to claim 1, wherein the spacing structure is a groove-like spacing structure.
8. A waveguide microwave switch according to claim 7, characterized in that the waveguide channel comprises a first waveguide port near the outside,
two groove-shaped limiting structures are arranged at the position, which is away from the first waveguide port by a third preset distance, in the waveguide channel;
and the connecting plane of the two groove-shaped limiting structures is parallel to the cross section of the waveguide channel.
9. A waveguide microwave switch according to claim 7, characterized in that the waveguide channel comprises a second waveguide port near the inner side,
two groove-shaped limiting structures are arranged at the position, away from the fourth preset distance of the second waveguide port, in the waveguide channel;
and the connecting plane of the two groove-shaped limiting structures is parallel to the cross section of the waveguide channel.
10. A waveguide microwave switch according to any one of claims 1 to 9, characterized in that the protective film is a film made of polyimide.
11. A waveguide microwave switch as claimed in claim 1, wherein the protective membrane is fixedly connected to the confinement structure by a sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976161.XA CN112234327A (en) | 2020-09-16 | 2020-09-16 | Waveguide microwave switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976161.XA CN112234327A (en) | 2020-09-16 | 2020-09-16 | Waveguide microwave switch |
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| Publication Number | Publication Date |
|---|---|
| CN112234327A true CN112234327A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010976161.XA Pending CN112234327A (en) | 2020-09-16 | 2020-09-16 | Waveguide microwave switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799784A (en) * | 2023-01-31 | 2023-03-14 | 成都世源频控技术股份有限公司 | Clutch type switch switching filter set |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60178707A (en) * | 1984-02-25 | 1985-09-12 | Tokyo Keiki Co Ltd | Slot array antenna system |
| US6018276A (en) * | 1997-01-14 | 2000-01-25 | Sharp Kabushiki Kaisha | Waveguide input apparatus of two orthogonally polarized waves including two probes attached to a common board |
| CN102377442A (en) * | 2010-08-26 | 2012-03-14 | 中国科学院物理研究所 | Low-temperature receiver based on waveguide input and output |
| CN104752793A (en) * | 2013-12-26 | 2015-07-01 | 中国科学院物理研究所 | Band-pass filter |
| CN205543159U (en) * | 2016-02-02 | 2016-08-31 | 中国科学院电子学研究所 | Microwave output window |
| CN109728383A (en) * | 2018-11-28 | 2019-05-07 | 中国航天时代电子有限公司 | A kind of novel sequence switching waveguide switch |
-
2020
- 2020-09-16 CN CN202010976161.XA patent/CN112234327A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60178707A (en) * | 1984-02-25 | 1985-09-12 | Tokyo Keiki Co Ltd | Slot array antenna system |
| US6018276A (en) * | 1997-01-14 | 2000-01-25 | Sharp Kabushiki Kaisha | Waveguide input apparatus of two orthogonally polarized waves including two probes attached to a common board |
| CN102377442A (en) * | 2010-08-26 | 2012-03-14 | 中国科学院物理研究所 | Low-temperature receiver based on waveguide input and output |
| CN104752793A (en) * | 2013-12-26 | 2015-07-01 | 中国科学院物理研究所 | Band-pass filter |
| CN205543159U (en) * | 2016-02-02 | 2016-08-31 | 中国科学院电子学研究所 | Microwave output window |
| CN109728383A (en) * | 2018-11-28 | 2019-05-07 | 中国航天时代电子有限公司 | A kind of novel sequence switching waveguide switch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799784A (en) * | 2023-01-31 | 2023-03-14 | 成都世源频控技术股份有限公司 | Clutch type switch switching filter set |
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Application publication date: 20210115 |