CN111564679A - Radio frequency switch with stable phase - Google Patents
Radio frequency switch with stable phase Download PDFInfo
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- CN111564679A CN111564679A CN202010482914.1A CN202010482914A CN111564679A CN 111564679 A CN111564679 A CN 111564679A CN 202010482914 A CN202010482914 A CN 202010482914A CN 111564679 A CN111564679 A CN 111564679A
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- attenuator
- directional coupler
- phase
- switch
- adjustable
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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
Abstract
The invention relates to a phase-stable radio frequency switch, comprising: the microwave attenuator comprises a first directional coupler, a directional attenuator, a second directional coupler, an adjustable attenuator, an adjustable phase shifter and a microwave switch; the input end of the first directional coupler is connected with an input signal, the output end of the first directional coupler is connected with the input end of the directional attenuator, the coupling end of the first directional coupler is further connected with the input end of the adjustable attenuator, the output end of the directional attenuator is connected with the coupling end of the second directional coupler, the output end of the adjustable attenuator is connected with the input end of the adjustable phase shifter, the output end of the adjustable phase shifter is connected with the input end of the microwave switch, and the output end of the microwave switch is connected with the output end of the second directional coupler. The radio frequency switch can realize the phase stability of the radio frequency signal when the radio frequency signal is turned on, and has the characteristics of high isolation, high switching speed and the like.
Description
Technical Field
The invention relates to the field of radio frequency switches, in particular to a radio frequency switch with stable phase.
Background
The radio frequency switch is a device capable of controlling the on-off of a radio frequency signal transmission path, has the characteristics of high response speed, high isolation, low insertion loss and the like, and is widely applied to the fields of radars, communication and the like.
In the prior art, generally only one radio frequency switch is adopted to control the microwave signal channel switching, but when a signal is connected/disconnected, a common radio frequency switch usually only controls the energy of the signal, the phase of the signal fluctuates by-10 mrad within several seconds, and the fluctuation can affect the frequency mixing of a system and the coherence process of the signal, so that the system is in an unstable working state within several seconds of phase fluctuation, and even the system is completely out of work. Therefore, it is necessary to provide a phase-stable rf switch to achieve continuous phase stabilization.
Disclosure of Invention
The invention aims to provide a radio frequency switch with continuous and stable phase, which realizes the phase stability when a radio frequency signal is turned on and has the characteristics of high isolation, high switching speed and the like.
In order to achieve the purpose, the invention provides the following scheme:
a phase-stabilized radio frequency switch, the radio frequency switch comprising:
the microwave attenuator comprises a first directional coupler, a directional attenuator, a second directional coupler, an adjustable attenuator, an adjustable phase shifter and a microwave switch;
the input end of the first directional coupler is connected with an input signal, the output end of the first directional coupler is connected with the input end of the directional attenuator, the coupling end of the first directional coupler is connected with the input end of the adjustable attenuator, the output end of the directional attenuator is connected with the coupling end of the second directional coupler, the output end of the adjustable attenuator is connected with the input end of the adjustable phase shifter, the output end of the adjustable phase shifter is connected with the input end of the microwave switch, and the output end of the microwave switch is connected with the output end of the second directional coupler.
Optionally, the microwave switch is of a PIN type.
Optionally, the directional attenuator is a 6dB directional attenuator.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the radio frequency switch, the first directional coupler, the directional attenuator, the second directional coupler, the adjustable attenuator, the adjustable phase shifter and the microwave switch are arranged, a 200MHz signal is divided into two paths through the first directional coupler, one path of the 200MHz signal is output to the 6dB directional attenuator, the other path of the 200MHz signal is output to the adjustable phase shifter, the phase is accurately adjusted through the adjustable phase shifter, the amplitude of the adjustable attenuator is adjusted to cancel the phase, the radio frequency signal is stable when being switched on, and the radio frequency switch has the advantages of being high in isolation degree, high in switching speed and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a phase-stable rf switch according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of turn-off ratio of the microwave RF interference switch according to the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating phase transient effects of an RF interference switch according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of phase transient effects of the RF interference switch and the commercial microwave switch according to the 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a radio frequency switch with continuous and stable phase, which realizes the phase stability when a radio frequency signal is turned on and has the characteristics of high isolation, high switching speed and the like.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a phase-stable rf switch according to an embodiment of the present invention, and as shown in fig. 1, the rf switch includes:
the microwave attenuator comprises a first directional coupler 1, a directional attenuator 2, a second directional coupler 3, an adjustable attenuator 4, an adjustable phase shifter 5 and a microwave switch 6;
the input end of the first directional coupler 1 is connected with an input signal, the output end of the first directional coupler 1 is connected with the input end of the directional attenuator 2, the coupling end of the first directional coupler 1 is further connected with the input end of the adjustable attenuator 4, the output end of the directional attenuator 2 is connected with the coupling end of the second directional coupler 3, the output end of the adjustable attenuator 4 is connected with the input end of the adjustable phase shifter 5, the output end of the adjustable phase shifter 5 is connected with the input end of the microwave switch 6, and the output end of the microwave switch 6 is connected with the output end of the second directional coupler 3.
The design of the radio frequency interference switch comes from an optical interferometer comprising two arms, one containing a PIN-type microwave switch and the other free to propagate, if the interferometer is tuned precisely to a destructive state, then when the switch is open, the output signal of the interferometer is strongly attenuated, the atoms do not interact with the excitation field propagating in the PIN-type microwave switch, and the phase of the microwave signal interacting with the atoms is always unaffected. The 200MHz signal is divided into two paths through the first directional coupler, one path is output to the 6dB directional attenuator, the other path is output to the adjustable phase shifter, the phase is accurately adjusted through the adjustable phase shifter, and the amplitude of the adjustable attenuator is adjusted to achieve phase cancellation. The attenuation ratio can reach 58dB as shown in fig. 2.
As shown in fig. 3 and 4, the fluctuation range disappears after the introduction of the rf interference switch, which indicates that the rf interference switch does not cause transient effect and discontinuity of the phase. However, the phase has an exponential downward trend at the moment of opening, as shown in fig. 3, similar to the phenomenon of microwave interference switches developed by the measurement institute. The down-trend phenomenon disappears by improvement, as shown in fig. 4, where the small graph in fig. 4 is the result of amplifying the phase fluctuation of the interferometric switch. Since the rf interferometric switching involves multiple devices introducing additional noise, the phase fluctuates by up to 10 μ rad over a five day time period.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A phase-stabilized radio frequency switch, comprising:
the microwave attenuator comprises a first directional coupler, a directional attenuator, a second directional coupler, an adjustable attenuator, an adjustable phase shifter and a microwave switch;
the input end of the first directional coupler is connected with an input signal, the output end of the first directional coupler is connected with the input end of the directional attenuator, the coupling end of the first directional coupler is further connected with the input end of the adjustable attenuator, the output end of the directional attenuator is connected with the coupling end of the second directional coupler, the output end of the adjustable attenuator is connected with the input end of the adjustable phase shifter, the output end of the adjustable phase shifter is connected with the input end of the microwave switch, and the output end of the microwave switch is connected with the output end of the second directional coupler.
2. The phase-stabilized radio frequency switch according to claim 1, characterized in that said microwave switch is of the PIN type.
3. The phase-stabilized radio frequency switch of claim 1, wherein the directional attenuator is a 6dB directional attenuator.
4. The phase-stabilized rf switch of claim 1, wherein the first directional coupler has an isolation of 25dB or greater, a coupling of 10dB, and an insertion loss of less than 0.9 dB.
5. The phase-stabilized rf switch of claim 1, wherein the second directional coupler has an isolation of 25dB or more, a coupling of 10dB, and an insertion loss of less than 0.9 dB.
6. The phase-stabilized radio frequency switch according to claim 1, wherein the adjustable range of the adjustable attenuator is 0-10 dB.
7. The phase-stabilized radio frequency switch according to claim 1, wherein the parameters of the adjustable phase shifter are DC-18GHz, 540 degrees.
8. The phase-stabilized rf switch of claim 1, wherein the insertion loss of the microwave switch is equal to or less than 1dB, and the isolation is equal to or greater than 50 dB.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482914.1A CN111564679B (en) | 2020-06-01 | 2020-06-01 | Radio frequency switch with stable phase |
| NL2028301A NL2028301B1 (en) | 2020-06-01 | 2021-05-27 | Phase-stable radio frequency switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482914.1A CN111564679B (en) | 2020-06-01 | 2020-06-01 | Radio frequency switch with stable phase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111564679A true CN111564679A (en) | 2020-08-21 |
| CN111564679B CN111564679B (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010482914.1A Active CN111564679B (en) | 2020-06-01 | 2020-06-01 | Radio frequency switch with stable phase |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1117464A (en) * | 1997-06-26 | 1999-01-22 | Hitachi Denshi Ltd | Phase shifter |
| JPH1174941A (en) * | 1997-06-20 | 1999-03-16 | Omron Corp | Phase modulator circuit |
| JP2002171101A (en) * | 2000-12-04 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Phase compensation gain control circuit, its regulating method, and radio communication device |
| CN101388649A (en) * | 2008-10-13 | 2009-03-18 | 电子科技大学 | Low non-linear power amplifier |
| CN106338658B (en) * | 2016-08-25 | 2018-12-25 | 南京航空航天大学 | The phase noise measurement method that is offseted based on radio frequency, device |
| CN109379145A (en) * | 2018-11-27 | 2019-02-22 | 维沃移动通信有限公司 | A kind of signal processing circuit, terminal device and signal processing method |
| CN110275199A (en) * | 2019-06-18 | 2019-09-24 | 中国科学院近代物理研究所 | A kind of resonance Schottky probe unit and its application method |
-
2020
- 2020-06-01 CN CN202010482914.1A patent/CN111564679B/en active Active
-
2021
- 2021-05-27 NL NL2028301A patent/NL2028301B1/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1174941A (en) * | 1997-06-20 | 1999-03-16 | Omron Corp | Phase modulator circuit |
| JPH1117464A (en) * | 1997-06-26 | 1999-01-22 | Hitachi Denshi Ltd | Phase shifter |
| JP2002171101A (en) * | 2000-12-04 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Phase compensation gain control circuit, its regulating method, and radio communication device |
| CN101388649A (en) * | 2008-10-13 | 2009-03-18 | 电子科技大学 | Low non-linear power amplifier |
| CN106338658B (en) * | 2016-08-25 | 2018-12-25 | 南京航空航天大学 | The phase noise measurement method that is offseted based on radio frequency, device |
| CN109379145A (en) * | 2018-11-27 | 2019-02-22 | 维沃移动通信有限公司 | A kind of signal processing circuit, terminal device and signal processing method |
| CN110275199A (en) * | 2019-06-18 | 2019-09-24 | 中国科学院近代物理研究所 | A kind of resonance Schottky probe unit and its application method |
Also Published As
| Publication number | Publication date |
|---|---|
| NL2028301A (en) | 2021-12-14 |
| NL2028301B1 (en) | 2023-02-24 |
| CN111564679B (en) | 2021-07-30 |
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