CN207009612U - A kind of high-isolation novel capacitor switch - Google Patents
A kind of high-isolation novel capacitor switch Download PDFInfo
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- CN207009612U CN207009612U CN201720824440.8U CN201720824440U CN207009612U CN 207009612 U CN207009612 U CN 207009612U CN 201720824440 U CN201720824440 U CN 201720824440U CN 207009612 U CN207009612 U CN 207009612U
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- insulating barrier
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- 238000002955 isolation Methods 0.000 title claims abstract description 20
- 239000003990 capacitor Substances 0.000 title claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005283 ground state Effects 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
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
A kind of high-isolation novel capacitor switch is the utility model is related to, belongs to RF switch technical field.Including co-plane waveguide CPW transmission lines and switch beam, the co-plane waveguide transmission line is by substrate, insulating barrier, ground wire and signal line group into, insulating barrier is located above substrate, signal wire is located at centre position above insulating barrier, ground wire is spaced apart with signal wire and is arranged symmetrically in the both ends above insulating barrier, the switch beam by clamped beam and anchor district's groups into, it is connected across by anchor area between ground wire, the signal wire is located at switch beam underlying surfaces and is provided with dielectric layer, the capacitance switch uses electrostatic drive, its ground wire connects direct current ground terminal, signal wire on-load voltage, on the clamped beam four size identical circular arc gap are surrounded by close to anchor area；The utility model increases inductance, realizes the reduction of resonant frequency and the lifting of isolation by changing fixed beam structure.
Description
Technical field
It the utility model is related to RF switch technical field, more particularly to a kind of high-isolation novel capacitor switch.
Background technology
Under the promotion of globalization of world economy, the information industry using wireless communication technology as core enters booming
Stage.People for the demand more and more higher of communication, urgently wish can it is efficient, convenient, obtain information exactly.So
And a large amount of passive splitter parts include the resistance that switch, wave filter, antenna, variable capacitance, inductance etc. but turn into system compact
Hinder.
Frequency-adjustable device can effectively transmit the useful signal of special frequency channel, reduce mutually dry between each communication channel
Disturb, fully using frequency spectrum resource, reduce frequency spectrum waste and ensure communication equipment normal work.The core composition of adjustable device is penetrated
The research of frequency switch is an important directions of wireless communication devices development.The performance of RF switch to adjustable device, or even it is whole
Individual communication system plays the role of important.The effective exploitation of high band is utilized adjustable to tunable filter, reconfigurable antenna etc.
Radio-frequency devices design proposes higher requirement.Therefore, it is necessary to which more advanced and mature switching technique ensures its realization.
RF MEMSs have the advantages that inexpensive, in light weight and small size, can efficiently solve passive device quality
Greatly, bulky problem.Meanwhile with the rise of working frequency, radio-frequency devices are to size, precision, firing frequency performance and Gao Ke
Higher requirement is proposed by property etc..Its excellent performance is applied in many fields.RF MEMS technologies can be realized
The miniaturization of each communication component and integrated, the processing speed of signal can be improved and reduce the power consumption and body of communication system
Product, by more and more extensive concern.
RF mems switch small volumes, light weight is insensitive to acceleration, no DC power, can low cost silicon or
Manufactured on person's glass, than GaAs technology cut-off frequency high power, there is excellent isolation and insertion loss in microwave frequency.
But existing capacitance switch structure, the switch beam portion of electrical current density between ground wire and signal wire is very high, and this is right
Reduce the insertion loss of switch and improve isolation and suffer from serious influence.
Utility model content
The problem of for shortcomings and deficiencies in the prior art, the utility model proposes a kind of high-isolation novel capacitor to open
Close, by changing fixed beam structure, increase inductance, realize the reduction of resonant frequency and the lifting of isolation.
Technical scheme is used by the utility model solves its technical problem：
A kind of high-isolation novel capacitor switch, including co-plane waveguide CPW transmission lines and switch beam, the copline ripple
Transmission line is led by substrate, insulating barrier, ground wire and signal line group into insulating barrier is located above substrate, and signal wire is located on insulating barrier
Square centre position, ground wire are spaced apart with signal wire and are arranged symmetrically in the both ends above insulating barrier, and the switch beam is by clamped beam
With anchor district's groups between being connected across ground wire by anchor area, the signal wire is located at switch beam underlying surfaces and is provided with dielectric layer, described
Capacitance switch uses electrostatic drive, its ground wire connection direct current ground terminal, signal wire on-load voltage, close to anchor area four on the clamped beam
Week is provided with four size identical circular arc gap.
Further, the clamped beam is provided with square release aperture.
The utility model has the advantages that：By setting circular arc gap on clamped beam, change traditional switch
The high structure of beam current density so that capacitance switch insertion loss reduces, isolation is higher；High isolation can be reached on high band
Degree, fully using frequency spectrum resource, reduce frequency spectrum waste and ensure communication equipment normal work；Using electrostatic drive, power consumption is lower,
Response is faster, smaller；The utility model also has the advantages that the linearity is good, microwave property is good, more lighting.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model switch beam top view；
Fig. 3 is the utility model simulation curve figure；
Fig. 4 is the utility model parameter computational chart.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
As illustrated, a kind of high-isolation novel capacitor switchs a kind of high-isolation novel capacitor switch, including copline
Waveguide CPW transmission lines 1 and switch beam 2, the co-plane waveguide transmission line 1 is by substrate 11, insulating barrier 12, ground wire 13 and signal wire
14 compositions, insulating barrier 12 are located at the top of substrate 11, and signal wire 14 is located at the top centre position of insulating barrier 12, ground wire 13 and signal wire
14 are spaced apart and are arranged symmetrically in the both ends of the top of insulating barrier 12, and the switch beam 2 is made up of clamped beam 21 and anchor area 22, passed through
Anchor area 22 is connected across between ground wire 13, and the signal wire 14 is located at the underlying surfaces of switch beam 2 and is provided with dielectric layer 31, and the electric capacity is opened
Pass uses electrostatic drive, its ground wire 13 connection direct current ground terminal, the on-load voltage of signal wire 14.
On the clamped beam 21 four size identical circular arc gap are surrounded by close to anchor area 22；Set on clamped beam 21
There is square release aperture 41.
Specifically, the action of switch is provided by direct-current static electric power, wherein ground wire 13 connects direct current ground terminal, while makes switch beam
2 are similarly in ground state, are Top electrode；It is bottom electrode and signal wire 14 loads high voltage or low-voltage.When signal wire 14 adds
When carrying high voltage, voltage difference is produced between signal wire 14 and switch beam 2, due to the attraction of electrostatic force, clamped beam 21 is by elastic shape
Change is close on dielectric layer 31, completes the drop-down of switch beam 2.Wherein, dielectric layer 31 is provided to underground state when switch beam 2 pulls down
Electric capacity.
The state on switch（Up states）When, electric capacity is smaller between signal wire 14 and the switch beam 2 for being connected across ground wire 13, radio frequency letter
Number pass through the structure onwards transmission of transmission line 1.When switch is pulled down by electrostatic force to be closed（Down states), switch beam 2 is close to
Dielectric layer 31, capacitance structure is formed, causes radiofrequency signal shorted to earth, so as to realize the blocking of radiofrequency signal.
From its simulation result, it is apparent that this it is novel switched can reach very high isolation on high band,
Especially in 35GHz resonant frequencies, switch isolation degree emulates the isolation for reaching 82dB.
The utility model reduces the part of switch beam 2 between ground wire 13 and signal wire 14 by changing the structure of clamped beam 21
Current density, inductance is increased, it is achieved thereby that the reduction of resonant frequency and the lifting of isolation.
Claims (2)
- A kind of 1. high-isolation novel capacitor switch, it is characterised in that：Including co-plane waveguide CPW transmission lines and switch beam, institute Co-plane waveguide transmission line is stated by substrate, insulating barrier, ground wire and signal line group into insulating barrier is located above substrate, signal wire position The centre position above insulating barrier, ground wire are spaced apart with signal wire and are arranged symmetrically in the both ends above insulating barrier, the switch Beam is by clamped beam with anchor district's groups between being connected across ground wire by anchor area, the signal wire is located at switch beam underlying surfaces and is provided with Dielectric layer, the capacitance switch use electrostatic drive, its ground wire connection direct current ground terminal, signal wire on-load voltage, the clamped beam It is upper to be surrounded by four size identical circular arc gap close to anchor area.
- A kind of 2. high-isolation novel capacitor switch according to claim 1, it is characterised in that：The clamped beam is provided with Square release aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720824440.8U CN207009612U (en) | 2017-07-10 | 2017-07-10 | A kind of high-isolation novel capacitor switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720824440.8U CN207009612U (en) | 2017-07-10 | 2017-07-10 | A kind of high-isolation novel capacitor switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207009612U true CN207009612U (en) | 2018-02-13 |
Family
ID=61452661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720824440.8U Active CN207009612U (en) | 2017-07-10 | 2017-07-10 | A kind of high-isolation novel capacitor switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207009612U (en) |
-
2017
- 2017-07-10 CN CN201720824440.8U patent/CN207009612U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Type of High Isolation Capacitor Switch Effective date of registration: 20231228 Granted publication date: 20180213 Pledgee: Agricultural Bank of China Limited by Share Ltd. Chizhou branch Pledgor: CHIZHOU RICHSEMI ELECTRONICS CO.,LTD. Registration number: Y2023980074541 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |