CN112467317B - Novel miniaturized low-insertion-loss microwave switch device - Google Patents
Novel miniaturized low-insertion-loss microwave switch device Download PDFInfo
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- CN112467317B CN112467317B CN202011296128.9A CN202011296128A CN112467317B CN 112467317 B CN112467317 B CN 112467317B CN 202011296128 A CN202011296128 A CN 202011296128A CN 112467317 B CN112467317 B CN 112467317B
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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 novel miniaturized low-insertion-loss microwave switch device, which comprises: the device comprises a main line part, a signal input part, a microstrip line unit, a switch part and a signal output part; the microstrip line unit includes: a first microstrip line part and a second microstrip line part; the main line part is connected with the signal input part; the main line part is connected with the first microstrip line part; the main line part is connected with the switch part; the switch part is connected with the second microstrip line part; the switch component is connected with the signal output component. The invention achieves the function of one-out-of-more by using the single-stage switch to replace the multi-stage switch nesting, reduces the number of switch structures through which signals enter a path, and reduces the insertion loss caused by the diode switch structure.
Description
Technical Field
The invention relates to the technical field of microwave switch devices, in particular to a novel miniaturized low-insertion-loss microwave switch device.
Background
One-out-of-many microwave switches are widely used at the receiving end of modern communication equipment, such as modern electronic countermeasure equipment. The multi-way switch commonly used in the existing microwave circuit generally adopts a multi-stage structure.
Patent document ZL2017212027697 discloses an ultra-wideband one-out-of-six microwave switch assembly, which comprises a decoder, a driving circuit and a microwave link module; the driving circuit comprises a triode, a resistor and a capacitor; the microwave link module comprises five one-out-of-four microwave switches, the four one-out-of-four switches are used as subordinate switches of the first-stage switch, and the switches are formed by pin diodes in series-parallel connection. Such a switch structure is bulky, the connection is complex and relatively fixed, which is not beneficial to the practical miniaturization and the diversification of the form, and the multi-stage switch structure is adopted, so that signals all need to pass through two stages of diode switches before entering a certain path, the insertion loss is often relatively high, and the transmission requirement for small signals or high accuracy is difficult to meet.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a novel miniaturized low-insertion-loss microwave switch device.
According to the invention, the novel miniaturized low-insertion-loss microwave switch device is characterized by comprising the following components: the device comprises a main line part, a signal input part, a microstrip line unit, a switch part and a signal output part; the microstrip line unit includes: a first microstrip line part and a second microstrip line part; the main line part is connected with the signal input part; the main line part is connected with the first microstrip line part; the main line part is connected with the switch part; the switch part is connected with the second microstrip line part; the switch component is connected with the signal output component.
Preferably, the method further comprises the following steps: a choke structure;
the choke structure is connected with the second microstrip line part.
Preferably, the resistances of the first microstrip line part and the second microstrip line part are greater than a set threshold.
Preferably, the trunk line part adopts a circular ring-shaped 50 Ω -long microstrip line.
Preferably, the switch component is an alternative switch.
Preferably, the number of the alternative switches is 12.
Preferably, the number of the signal output parts is 12.
Preferably, the first microstrip line section is a narrow microstrip line.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention achieves the function of one-out-of-more by using the single-stage switch to replace the multi-stage switch nesting, reduces the number of switch structures through which signals enter a path, and reduces the insertion loss caused by a diode switch structure;
2. the invention utilizes the inductance-capacitance choking structure at the tail end of the branch node to control the signal frequency, and the signal entering the unconnected branch node in the working frequency of the switch is grounded, so that the influence of the reflection of the same-frequency signal from other unconnected circuit structures on one path of the switch is eliminated;
3) the switch structure is connected with the microstrip line, the shape of the switch structure can adapt to the whole structure of a system circuit, and the switch structure can be adjusted by changing the shape of the long microstrip line, is not limited to a certain fixed shape or position, and can form various shapes such as a circular ring shape, a linear shape and the like according to the design condition.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a twelve-out-of-one microwave switch in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a twelve-out-of-one microwave switch circuit in the embodiment of the present invention.
Fig. 3 is a schematic diagram of a part of the structure of the switching branch in the embodiment of the present invention.
Fig. 4 is a schematic diagram of S parameters in the 11 th run in the embodiment of the present invention.
Fig. 5 is a schematic diagram of S parameters during the 12 th operation in the embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention uses multi-path single-stage switches, and solves the problems of complex structure and high insertion loss of the common multi-stage switch;
the invention comprehensively utilizes the half-wavelength microstrip line, the high-resistance line and the inductance-capacitance choke structure, solves the problem that one path of signal transmission is influenced by the whole structure of the microstrip line, realizes high isolation among all branches, and enables each path of parameter to be independently adjusted.
A novel miniaturized low-insertion-loss microwave switch device comprises the following parts:
1. a section of circular 50 omega long microstrip line is used as a trunk, one end of the microstrip line is connected with a signal input end, the other end of the microstrip line is connected with a narrow microstrip line and used as a high-resistance line, so that the microstrip line can prevent signals from passing through the microstrip line when a switch is disconnected, the shape of the microstrip line can be modified along with the overall design of a circuit, the principle of the microstrip line is shown in figure 1, and the structure of the microstrip line is shown in figure 2;
2. one end of each of the 12 two-way switches is connected with the trunk, the distance between every two-way switches and the connection point of the trunk is approximately equal to one half of the working wavelength, and through the transmission characteristic of signals on a transmission line with one half of the wavelength, all the branches behind the switches form a high-resistance line when the certain switch is switched on, so that the transmission of the current path signals is not influenced by the subsequent branch sections, and the signals are ensured to enter the gating line as much as possible;
3. one of the two-way switch is connected with a microstrip high-resistance line and then grounded with the parallel structure of the inductor and the capacitor, as shown in fig. 3. When a switch of one path is switched on, other paths are connected with a high-resistance line to prevent input signals from being transmitted to the high-resistance line, and the inductor-capacitor parallel structure can enable a small amount of signals entering the path to be grounded, so that the influence of signal reflection on the transmission characteristics of other paths is prevented, and good isolation among the branches is realized. The other path is connected with the signal output end;
4. the one-out-of-twelve function of the whole system is realized through the on-off of the one-out-of-two switch, and the microstrip line parameters are designed, so that when only one path is communicated with the signal output end, signals are transmitted to the signal output end from the input end through the microstrip line in a low-loss mode.
Specifically, in one embodiment, a twelve-out-of-one microwave switch requires an operating center frequency of 4.75GHz and a frequency bandwidth of 100 MHz. At this time, the circuit is made of a substrate with a thickness of 0.254mm and a relative dielectric constant of 2.2. The trunk width of the 50 omega transmission line is 0.73mm, and the line width of the high-resistance microstrip line is 0.2 mm. The distance between every two alternative switches is 22.5 mm; the length of the microstrip line between the branch node at the tail end and the high impedance line at the tail end is 28.2 mm; the length of the branch microstrip line is 11.5 mm. The inductance L at the end of each stub is 26nH, and the capacitance C is 10 pF. The simulation results of the circuit part of the design are shown in fig. 4 and fig. 5, when twelve channels are switched on in a twelve-out-of-two mode within the range of 4.7GHz-4.8GHz, the return loss coefficients are all smaller than-15 dB, and the transmission coefficient is larger than-1 dB, which shows that most of signals at the input end enter one channel switched on by the switch, and the transmission effect is good.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (5)
1. The utility model provides a novel miniaturized low insertion loss microwave switch device which characterized in that includes: the device comprises a main line part, a signal input part, a microstrip line unit, a switch part and a signal output part;
the microstrip line unit includes: a first microstrip line part and a second microstrip line part;
the main line part is connected with the signal input part;
the main line part is connected with the first microstrip line part;
the main line part is connected with the switch part;
the switch part is connected with the second microstrip line part;
the switch component is connected with the signal output component;
a choke structure;
the choke structure is connected with the second microstrip line part;
the choke structure controls the signal frequency, and the signal entering the unconnected branch section in the switch working frequency is grounded, so that the influence of reflection of the same-frequency signal from other unconnected circuit structures on one path of switch connection is eliminated;
when a switch of one path is switched on, other paths are connected with a high-resistance line to prevent input signals from being transmitted to the high-resistance line, and the inductor-capacitor parallel structure can enable a small amount of signals entering the path to be grounded, so that the influence of signal reflection on the transmission characteristics of other paths is prevented, and good isolation among the branches is realized;
the resistances of the first microstrip line part and the second microstrip line part are greater than a set threshold;
the main line part adopts a ring-shaped 50 omega long microstrip line; the annular 50 omega long microstrip line is used as a trunk, one end of the microstrip line is connected with a signal input end, and the other end of the microstrip line is connected with a narrow microstrip line and used as a high-resistance line;
the switch component adopts an alternative switch;
one path of the alternative switch is connected with a microstrip high-resistance line and then grounded with the parallel structure of the inductor and the capacitor.
2. A novel miniaturized low insertion loss microwave switch device according to claim 1, characterized in that the number of said alternative switches is 12.
3. The novel miniaturized low insertion loss microwave switching device of claim 2 wherein the number of signal output components is 12.
4. A novel miniaturized low insertion loss microwave switch device according to claim 1, characterized in that said first microstrip line section is a narrow microstrip line.
5. The utility model provides a novel miniaturized low insertion loss microwave switch device which characterized in that includes: the device comprises a main line part, a signal input part, a microstrip line unit, a switch part and a signal output part;
the microstrip line unit includes: a first microstrip line part and a second microstrip line part;
the main line part is connected with the signal input part;
the main line part is connected with the first microstrip line part;
the main line part is connected with the switch part;
the switch part is connected with the second microstrip line part;
the switch component is connected with the signal output component;
further comprising: a choke structure;
the choke structure is connected with the second microstrip line part;
the resistances of the first microstrip line part and the second microstrip line part are greater than a set threshold;
the main line part adopts a ring-shaped 50 omega long microstrip line;
the switch component adopts an alternative switch;
the number of the alternative switches is 12;
the number of the signal output parts is 12;
the first microstrip line part adopts a narrow microstrip line;
one path of the alternative switch is connected with a microstrip high-resistance line and then grounded with the parallel structure of the inductor and the capacitor;
when a switch of one path is switched on, other paths are connected with a high-resistance line to prevent input signals from being transmitted to the high-resistance line, and the inductor-capacitor parallel structure can enable a small amount of signals entering the path to be grounded, so that the influence of signal reflection on the transmission characteristics of other paths is prevented, and good isolation among the branches is realized;
the ring-shaped 50 omega long microstrip line is used as a trunk, one end of the microstrip line is connected with a signal input end, and the other end of the microstrip line is connected with a narrow microstrip line and used as a high-resistance line.
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| CN202011296128.9A CN112467317B (en) | 2020-11-18 | 2020-11-18 | Novel miniaturized low-insertion-loss microwave switch device |
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| CN112467317B true CN112467317B (en) | 2021-11-23 |
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| CN108270054A (en) * | 2018-03-16 | 2018-07-10 | 成都中电锦江信息产业有限公司 | C-band minimizes low-loss microwave hilted broadsword four-throw solid-state switch |
| CN108292911A (en) * | 2015-12-03 | 2018-07-17 | 派瑞格恩半导体有限公司 | Low phase shift high frequency attenuator |
Family Cites Families (4)
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| CN101202369B (en) * | 2007-12-11 | 2011-12-07 | 中国电子科技集团公司第五十五研究所 | Miniature MEMS switching line phase shifter |
| US8049574B2 (en) * | 2009-05-18 | 2011-11-01 | Lockheed Martin Corporation | High power UHF single-pole multi-throw switch |
| US9362602B2 (en) * | 2013-06-17 | 2016-06-07 | The United States Of America As Represented By The Secretary Of The Army | Power dividing and/or power-combining circuits with isolation |
| US11362698B2 (en) * | 2017-07-20 | 2022-06-14 | L3Harris Technologies, Inc. | Low-insertion-loss triple throw switch |
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| CN101127025A (en) * | 1993-12-28 | 2008-02-20 | 株式会社日立制作所 | Signal transmitting device suitable for fast signal transmission |
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| CN108292911A (en) * | 2015-12-03 | 2018-07-17 | 派瑞格恩半导体有限公司 | Low phase shift high frequency attenuator |
| CN107069152A (en) * | 2017-03-21 | 2017-08-18 | 南京米乐为微电子科技有限公司 | A kind of integrated single-pole double-throw switch (SPDT) of high-power high-isolation of millimeter wave ultra-wideband |
| CN108270054A (en) * | 2018-03-16 | 2018-07-10 | 成都中电锦江信息产业有限公司 | C-band minimizes low-loss microwave hilted broadsword four-throw solid-state switch |
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