CN206114774U - FSS structure for real -time calibration - Google Patents
FSS structure for real -time calibration Download PDFInfo
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- CN206114774U CN206114774U CN201620716025.6U CN201620716025U CN206114774U CN 206114774 U CN206114774 U CN 206114774U CN 201620716025 U CN201620716025 U CN 201620716025U CN 206114774 U CN206114774 U CN 206114774U
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- fss
- diode
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- switch
- fss structure
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Abstract
The utility model relates to a switch, in particular to FSS structure for real -time calibration. The switch include FSS structure and diode, each of FSS structure is selected frequently and all is connected with the diode on the array unit, the waveguide equipotential be connected of diode negative electrode and switch, the positive electrode is drawn forth from the waveguide fluting is insulating, connects. The utility model provides a can be applied to the electronic switch of phase detection system phase place calibration, solve the phase place calibration accuracy and hanged down, received environmental factor to influence big technical problem.
Description
Technical field
This utility model is related to a kind of switch, the FSS structure electricals switch of more particularly to a kind of real time calibration.
Background technology
Radome electricity thickness measure is mutually made an uproar with frequency stability, measuring system, temperature drift is relevant.Measurement process is to environmental requirement
Higher, the test used time is very long.Elapse over time, environmental change, instrument temperature drift, cable shake cause test system amplitude and phase
The skew of position, it is necessary to calibrated.Traditional system calibration is to carry out manual calibration to port in the case where survey state is stopped, not only take but also
Imperfect, more fatal is to need ceaselessly to calibrate in test process, and this can not possibly be completed in testing automatically.For this just
Need to improve instrument design parameter, such as improve frequency stability, drop Low phase noise, temperature drift correction etc., but this is again by technical merit
Limit, many parameters can not possibly unconfined improve.Therefore electric thickness measure precision and stability can only maintain certain degree,
Such as 1 ° of uncertainty.Using real time calibration with switch to offset the measurement error that variation of ambient temperature is brought, become and improve electricity thickness
The effective means of degree certainty of measurement.
The content of the invention
The purpose of this utility model：A kind of phase test system real time calibration FSS structure electricals switch is provided.
The technical solution of the utility model：A kind of FSS structure electricals switch of real time calibration, it is characterized by：Described
Switch includes FSS structures and diode, and each of FSS structures is selected frequently diode is connected with a period of time unit；
Described diode negative electrode and the waveguide isoelectric level that is connected of switch, anelectrode insulate from waveguide fluting extraction,
Connection power supply.
Preferably, described frequency is selected, and FSS structures are bilayer.
Preferably, the negative pole of diode and waveguide isoelectric level, positive pole are insulated with waveguide and are connected power supply.
The beneficial effects of the utility model：There is provided a kind of electronic cutting that can be applied to phase detection phase alignment
Close, solve phase alignment precision it is low, by the big technical problem of such environmental effects.
Description of the drawings
Fig. 1 selects a period of time schematic diagram for frequency.
Specific embodiment
Described switch includes FSS structures and diode, and each of FSS structures is selected frequently two are connected with a period of time unit
Pole pipe；Described diode negative electrode and the waveguide isoelectric level that be connected of switch, anelectrode insulate from waveguide fluting extraction, connect
Power supply.
Frequency-selective surfaces (FSS) are a kind of two-dimensional and periodic array junctions to incident electromagnetic wave with selecting frequency characteristic
Structure.The array structure is made up of substantial amounts of passive resonance unit periodic arrangement.Frequency-selective surfaces to resonant frequency at
Incident electromagnetic wave shows the selecting frequency characteristic of total reflection or total transmissivity.
Traditional FSS resonant elements are divided into metal patch and conductor screen perforate two types.Incident electromagnetic wave is because of resonance list
The periodicity of unit produces various scattering effects and modulated.When incident electromagnetic wave is radiated at FSS surfaces, in each resonance list
The certain faradic current of unit's excitation forms scattered field, is superimposed to form the resultant field with filtering characteristic with in-field.
FSS cellular constructions have the multiple structural forms such as dipole, square, annular, cross, Y shape, according to bandwidth compared with
Greatly, resonant frequency stability is high, and square array minor structure may be selected.
For the electrical switch of real time calibration, with band logical and band two kinds of working conditions of resistance, therefore active FSS structures are selected
Mode, by the impedance of PIN diode and microwave varactor, adjusts which and stays bias current or voltage to be controlled.
To unloaded FSS a period of time, equivalent to a kind of LC parallel resonances structure, when electromagnetic wave by when there is selecting frequency characteristic.
According to formula, as capacitive load is raised, resonant frequency is raised, otherwise is then reduced.Inductance loading is also such.Using the spy
Property, loading capacitance realize the break-make of electrical switch changing the population structure of electrical switch.Consider from manufacturability, preferably using two
Pole pipe load mode.During positive power-up, diode current flow, when zero-bias or negative sense power-up, diode is unable to work in high-impedance state
Make.
FSS in electrical switch really can not be independently present in three dimensions, need coated by dielectric, i.e. supporter.It is situated between
The loading of material can affect the selecting frequency characteristic of periodic structure to a certain extent.As dielectric permittivity is more than air,
This can cause the electromagnetic wavelength of Propagation to reduce, and eventually force the resonant frequency in a period of time in cycle to shift.
In the design of FSS results, the attenuation outside a channel of monolayer FSS structures is more slow, and general with interior flatness, therefore examines
Worry adopts Cascaded Double-layer, the FSS structures of dielectric surface loading to meet bandwidth requirement, and to have preferably with outer cut-off.
In phase test system, electronic switch unit is transmission channel of popping one's head in be compensated by the method for reflecting,
The width that causes of shake can mutually be fluctuated, the amplitude phase error that the fluctuation of the temperature drift of instrument, Measurement channel, switch cause is carried out in real time
Compensation.Electrical switch can introduce Insertion Loss and phase place to transmission channel certainly, but due to be under conducting situation transmission state, its
For passive device, the Insertion Loss brought by which and phase place can utilize the mode of compensation table compensate.
Claims (3)
1. a kind of FSS structure electricals of real time calibration are switched, it is characterized by：Described switch includes FSS structures and diode,
Each of FSS structures is selected frequently and diode is connected with a period of time unit；
Described diode negative electrode and the waveguide isoelectric level that be connected of switch, anelectrode insulate from waveguide fluting extraction, connect
Power supply.
2. a kind of FSS structure electricals of real time calibration according to claim 1 are switched, it is characterized by：Described frequency choosing
Square endless metal body is provided with a period of time unit, FSS structures are bilayer.
3. a kind of FSS structure electricals of real time calibration according to claim 1 are switched, it is characterized by：Diode it is negative
Pole and waveguide isoelectric level, positive pole are insulated with waveguide and are connected power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620716025.6U CN206114774U (en) | 2016-07-08 | 2016-07-08 | FSS structure for real -time calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620716025.6U CN206114774U (en) | 2016-07-08 | 2016-07-08 | FSS structure for real -time calibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206114774U true CN206114774U (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620716025.6U Active CN206114774U (en) | 2016-07-08 | 2016-07-08 | FSS structure for real -time calibration |
Country Status (1)
| Country | Link |
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| CN (1) | CN206114774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676592A (en) * | 2019-11-04 | 2020-01-10 | 淮安信息职业技术学院 | Dual-polarized three-order band-pass three-dimensional frequency selection surface |
| CN110690577A (en) * | 2019-09-17 | 2020-01-14 | 淮安信息职业技术学院 | Dual-polarization band-pass three-dimensional frequency selection surface with bilateral steep drop characteristic |
-
2016
- 2016-07-08 CN CN201620716025.6U patent/CN206114774U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690577A (en) * | 2019-09-17 | 2020-01-14 | 淮安信息职业技术学院 | Dual-polarization band-pass three-dimensional frequency selection surface with bilateral steep drop characteristic |
| CN110676592A (en) * | 2019-11-04 | 2020-01-10 | 淮安信息职业技术学院 | Dual-polarized three-order band-pass three-dimensional frequency selection surface |
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