CN205646079U - Adjustable plane band -pass - band elimination filter - Google Patents
Adjustable plane band -pass - band elimination filter Download PDFInfo
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- CN205646079U CN205646079U CN201620089366.5U CN201620089366U CN205646079U CN 205646079 U CN205646079 U CN 205646079U CN 201620089366 U CN201620089366 U CN 201620089366U CN 205646079 U CN205646079 U CN 205646079U
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Abstract
The utility model discloses an adjustable plane band -pass band elimination filter to the preparation of printed circuit board's mode two -sided cover copper microstrip board on, two -sided cover copper microstrip board with in the one side respectively the preparation have feeder port port1 and feeder port port2, first microstrip line, second microstrip line, third microstrip line, fourth microstrip line, first syntonizer, second syntonizer and the third syntonizer that is used for the input or exports the electromagnetic wave signal, this two -sided another side that covers copper microstrip board is for covering the copper ground plate. This wave filter is at the syntonizer terminal loading varactor of minor matters of opening a way, thereby adjusts the appearance value of varactor through the voltage of control varactor, and then adjusts the central frequency of wave filter, and the band -pass band -stop characteristic's regulation is controlled by the PIN diode. The utility model discloses a wave filter has a great deal of advantages such as can switch at band pass filter and band elimination filter, central frequency is controllable, simple structure, size are little.
Description
Technical field
This utility model relates to the technical field of plane microstrip filter, leads to-band elimination filter particularly to a kind of adjustable planar band.
Background technology
In recent years, the high speed development of radio communication, universal, the arrival of 4G of 3G technology, all indicate that wireless technology will welcome a flourish peak period.Simultaneously along with wireless electronic product popularizing in people's lives, miniaturization, low cost have had become as the trend of electronic product.On the other hand, along with the fast development of electronic information, the frequency spectrum resource being becoming tight day is deficienter, for improving message capacity and reducing signal cross-talk between adjacent channel, has higher requirement the selectivity of wave filter and integrated etc..Microstrip filter then meets this some requirements.
In radio-frequency filter, the research belonging to band filter and band elimination filter is the most active, and the IEEE TMTT and IEEE MWCL of each phase has substantial amounts of about band filter with the article of band elimination filter.Wherein, band filter is one of most important element in Modern Communication System, and its signal acting as in making band logical passes freely through and allows the logical outer information of band pass through damply as far as possible.Band elimination filter is the most contrary, it is therefore an objective to allow the passing through of the decay as far as possible of the signal in stopband, and allow signal outside band freely through, the decay of unwanted interference and noise etc. is had great importance by this.
But along with becoming increasingly complex of electromagnetic environment, broadband wireless system it is frequently necessary to receive and is under dynamic interference environment required signal, the most changeable band is logical-and band elimination filter is just of great immediate significance.Because for a high power interference electromagnetic environment, bandstop mode can suppress the high-power interference near desired signal, and bandpass mode can be used under low-power jamming pattern.It is therefore necessary to band changeable to micro-strip logical-band elimination filter further studied.
Data shows the article delivering entitled " Two-and Four-Pole Tunable 0.7 1.1-GHzBandpass-to-Bandstop Filters With Bandwidth Control " in March, 2014, Young-Ho Cho and Gabriel M.Rebeiz on the top periodical of the art " IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES ".This wave filter employs radio-frequency (RF) switch, controls the switching of band filter and band elimination filter.The switch that this wave filter uses is RF mems switch, though this switch characteristic good, the cost of its costliness limits its popularization and application, and this patent uses PIN diode to control to carry the selection of logical-band-stop response, and PIN diode is widely used, technology maturation, cheap and easily-available.
Simultaneously, data is additionally shown in April, 2013, William J.Chappell etc. has delivered " New Bandstop Filter Circuit Topology and Its Application to Design of a Bandstop-to-Bandpass Switchable Filter " at the top periodical of the art " IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES ", and the wave filter of this article design is as shown in Figure 1.This wave filter is also the switching being realized band filter and band elimination filter by RF mems switch.
Utility model content
This utility model open end end based on 1/2nd wavelength open minor matters and quarter-wave short circuit minor matters loading varactor devises a kind of adjustable planar band and leads to-band elimination filter.This wave filter loads varactor at the open end end of open circuit minor matters end and short circuit minor matters, regulates the capacitance of varactor by controlling the voltage of varactor, and then the mid frequency of regulation wave filter, and carries the regulation of logical-band-stop response by PIN diode management and control system.
The purpose of this utility model is achieved through the following technical solutions:
A kind of adjustable planar band leads to-band elimination filter, it is produced in the manner of a printed circuit board on double-sided copper-clad micro-strip plate 1, it is produced in the manner of a printed circuit board on double-sided copper-clad micro-strip plate 1, making respectively on the same face of described double-sided copper-clad micro-strip plate 1 and have for inputting or export the feeder line port port1 and feeder line port port2 of electromagnetic wave signal, first microstrip line the 21, second microstrip line the 22, the 3rd microstrip line the 25, the 4th microstrip line the 26, first resonator, the second resonator and the 3rd resonator, the another side of this double-sided copper-clad micro-strip plate 1 is for covering copper earth plate；
Wherein, described first resonator, the second resonator and the 3rd resonator are positioned at the same side of the straight line that input/output port port1 and port2 is constituted；
Described feeder line port port1 top half is connected with the first end of the first port microstrip line 23, and the second end of the first port microstrip line 23 is by series connection capacitance C11It is connected with the first end of described first microstrip line 21；Described feeder line port port1 the latter half is connected with the first end of the second port microstrip line 24, and the second end of the second port microstrip line 24 is by series connection capacitance C12It is connected with the first end of described second microstrip line 22；Described feeder line port port2 top half is connected with the second end of the 3rd port microstrip line 27, and the first end of the 3rd port microstrip line 27 is by series connection capacitance C13It is connected with the second end of described 3rd microstrip line 25；Described feeder line port port2 the latter half is connected with the second end of four-port microstrip line 28, and the first end of four-port microstrip line 28 is by series connection capacitance C14It is connected with the second end of described 4th microstrip line 26；Second end of described first microstrip line 21 is by series connection capacitance C21Being connected with the first end of the 5th microstrip line 29, the second end of the 5th microstrip line 29 is connected with the second end of described second microstrip line 22；First end of described 3rd microstrip line 25 passes through capacitance C22Being connected with the first end of the 6th microstrip line 210, the second end of the 6th microstrip line 210 is connected with the first end of described 4th microstrip line 26；External direct current power supply V simultaneously1By series connection high frequency choke coil RF choke and current-limiting resistance R1First end of described second microstrip line 22 of rear access, the second end of described 4th microstrip line 26 is by series connection high frequency choke coil RF choke ground connection；Second end of described second microstrip line 22 and the first end of described 4th microstrip line 26 are by series connected PIN diodes D1Connect.
Further, by controlling external direct current power supply V1Voltage so that control described PIN diode D1Both end voltage, it is achieved described PIN diode D1The control of open and-shut mode, as described PIN diode D1Forward voltage more than 5V time, PIN diode two ends are fully on, the most described PIN diode D1Being in closure state, it is the connecting line between input and output port that described wave filter is in bandstop mode, described second microstrip line (22) and described 4th microstrip line (26)；When external direct current power supply V1 is zero, described PIN diode D1Disconnection is in isolation, and it is the feeder line between input and output port that described wave filter is in bandpass mode, described second microstrip line (22) and described 4th microstrip line (26).
Further, described first resonator includes the first open circuit minor matters the 31, the 7th microstrip line 32 and ground connection microstrip line 33, and described first open circuit minor matters 31, described 7th microstrip line 32 and described ground connection microstrip line 33 constitute one U-shaped；Described second resonator includes the second open circuit minor matters the 36, the 8th microstrip line 35 and ground connection microstrip line 34, and described second open circuit minor matters 36, described 8th microstrip line 35 and described ground connection microstrip line 34 constitute one U-shaped；Described 3rd resonator includes the 3rd open circuit minor matters the 44, the 4th open circuit minor matters the 45, the 9th microstrip line the 41, the tenth microstrip line the 42, the 11st microstrip line the 43, the 12nd microstrip line the 46, the 13rd microstrip line 47, wherein said 9th microstrip line 41 and described 3rd open circuit minor matters 44 constitute a L-type, described 12nd microstrip line the 46, the tenth microstrip line the 42, the 13rd microstrip line 47 constitute one U-shaped, described 11st microstrip line 43 constitutes a L-type with described 4th open circuit minor matters 45.
Further, described first, second, third resonator becomes left-right symmetric relation with the perpendicular bisector of described tenth microstrip line 42.
Further, described first port microstrip line 23, described first microstrip line 21 are with described 3rd microstrip line 25, described 3rd port microstrip line 27 on the same line, described second port microstrip 24, described second microstrip line 22 are with described 4th microstrip line 26, described four-port microstrip 28 on the same line, described 7th microstrip line 32, described tenth microstrip line 35 are on the same line, parallel to each other between above-mentioned straight line；Described first open circuit minor matters 31, described first ground connection microstrip line 33, described 5th microstrip line 29, described 6th microstrip line 210, described second ground connection microstrip line 34, described second open circuit minor matters 36, described 3rd open circuit minor matters 44, described 4th open circuit minor matters 45, described 12nd microstrip line 46, described 13rd microstrip line 47 respectively place straight line between the most parallel to each other.
Further, the open circuit port of described first open circuit minor matters 31 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V21Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of described second open circuit minor matters 36 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V22Connect, the most respectively by series connection capacitance, varactor ground connection.
Further, the open circuit port of described 3rd open circuit minor matters 44 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V31Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of described 4th open circuit minor matters 45 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V32Connect, the most respectively by series connection capacitance, varactor ground connection.
Further, when described first open circuit minor matters 31, described 7th microstrip line 32, described micro-strip short-circuit line 33 work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding；
When described second open circuit minor matters 36, described 8th microstrip line 35, described micro-strip short-circuit line 34 work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding.
Further, described 3rd open circuit minor matters 44 and described 4th open circuit minor matters 45, described 9th microstrip line 41, described tenth microstrip line 42, described 11st microstrip line 43, described 12nd microstrip line 46, described 13rd microstrip line 47 are equivalent to 1/2nd wavelength that during work of described wave filter, mid frequency is corresponding with the microstrip line length sum of equivalence during the work of varactor.
Further, described first microstrip line 21, described second microstrip line 22, described 3rd microstrip line 25, the length of described 4th microstrip line 26 are respectively greater than described 7th microstrip line 32 and the length of described 8th microstrip line 35.
This utility model has such advantages as relative to prior art and effect:
1, this utility model uses PIN diode in wave filter, can control wave filter flexibly and switch between bandpass mode and bandstop mode.
2, the mid frequency of bandpass mode and bandstop mode can regulate the most on a large scale, and wherein, the adjustable extent of bandpass mode is 670MHz-1210MHz, and the adjustable extent of bandstop mode is 670MHz-1225MHz.
3, feeder line uses engraved structure, adds the length of feeder line, adds end stiffness of coupling, the design of convenient wave filter.
4, feeder terminal is loaded with varactor, in that context it may be convenient to adjustable side stiffness of coupling, on the one hand facilitates the design of wave filter, on the other hand adds the adjustable extent of frequency.
5, being microstrip structure due to wave filter, volume is little, lightweight, low cost, be suitable for industrial mass manufacture, so the advantage that wave filter possesses simple in construction, production cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation carrying logical-band elimination filter in prior art；
Fig. 2 be a kind of adjustable planar band disclosed in this utility model logical-structural representation of band elimination filter；
Fig. 3 is the ADS model of the varactor used in this utility model；
Fig. 4 (a) is PIN diode scattering parameter S of wave filter when being in isolation11Simulation result figure；
Fig. 4 (b) is PIN diode scattering parameter S of wave filter when being in isolation21Simulation result figure；
Fig. 5 (a) is PIN diode scattering parameter S of wave filter when being in closure state11Simulation result figure；
Fig. 5 (b) is PIN diode scattering parameter S of wave filter when being in closure state21Simulation result figure.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, clear and definite, this utility model is further described by the embodiment that develops simultaneously referring to the drawings.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Embodiment
The structural representation of a kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters as shown in Figure 2, a kind of adjustable planar band disclosed in the present embodiment leads to-band elimination filter, and open end ends based on 1/2nd wavelength open minor matters and quarter-wave short circuit minor matters load varactor.
This wave filter is produced on double-sided copper-clad micro-strip plate 1 in the manner of a printed circuit board, making respectively on the same face of described double-sided copper-clad micro-strip plate 1 and have for inputting or export the feeder line port port1 and feeder line port port2 of electromagnetic wave signal, first microstrip line the 21, second microstrip line the 22, the 3rd microstrip line the 25, the 4th microstrip line the 26, first resonator, the second resonator and the 3rd resonator, the another side of this double-sided copper-clad micro-strip plate 1 is for covering copper earth plate；
Wherein, described first resonator, the second resonator and the 3rd resonator are positioned at the same side of the straight line that input/output port port1 and port2 is constituted；
Described feeder line port port1 top half is connected with the first end of the first port microstrip line 23, and the second end of the first port microstrip line 23 is by series connection capacitance C11It is connected with the first end of described first microstrip line 21；Described feeder line port port1 the latter half is connected with the first end of the second port microstrip line 24, and the second end of the second port microstrip line 24 is by series connection capacitance C12It is connected with the first end of described second microstrip line 22；Described feeder line port port2 top half is connected with the second end of the 3rd port microstrip line 27, and the first end of the 3rd port microstrip line 27 is by series connection capacitance C13It is connected with the second end of described 3rd microstrip line 25；Described feeder line port port2 the latter half is connected with the second end of four-port microstrip line 28, and the first end of four-port microstrip line 28 is by series connection capacitance C14It is connected with the second end of described 4th microstrip line 26；Second end of described first microstrip line 21 is by series connection capacitance C21Being connected with the first end of the 5th microstrip line 29, the second end of the 5th microstrip line 29 is connected with the second end of described second microstrip line 22；First end of described 3rd microstrip line 25 passes through capacitance C22Being connected with the first end of the 6th microstrip line 210, the second end of the 6th microstrip line 210 is connected with the first end of described 4th microstrip line 26；External direct current power supply V simultaneously1By series connection high frequency choke coil RF choke and current-limiting resistance R1First end of described second microstrip line 22 of rear access, the second end of described 4th microstrip line 26 is by series connection high frequency choke coil RF choke ground connection；Second end of described second microstrip line 22 and the first end of described 4th microstrip line 26 are by series connected PIN diodes D1Connect.
By controlling external direct current power supply V1Voltage so that control described PIN diode D1Both end voltage, it is achieved described PIN diode D1The control of open and-shut mode, as described PIN diode D1Forward voltage more than 5V time, PIN diode two ends are fully on, the most described PIN diode D1Being in closure state, it is the connecting line between input and output port that described wave filter is in bandstop mode, described second microstrip line (22) and described 4th microstrip line (26)；When external direct current power supply V1 is zero, described PIN diode D1Disconnection is in isolation, and it is the feeder line between input and output port that described wave filter is in bandpass mode, described second microstrip line (22) and described 4th microstrip line (26).
Wherein, the first resonator includes the first open circuit minor matters the 31, the 7th microstrip line 32 and ground connection microstrip line 33, and described first open circuit minor matters 31, described 7th microstrip line 32 and described ground connection microstrip line 33 constitute one U-shaped；Second resonator includes the second open circuit minor matters the 36, the 8th microstrip line 35 and ground connection microstrip line 34, and described second open circuit minor matters 36, described 8th microstrip line 35 and described ground connection microstrip line 34 constitute one U-shaped；3rd resonator includes the 3rd open circuit minor matters the 44, the 4th open circuit minor matters the 45, the 9th microstrip line the 41, the tenth microstrip line the 42, the 11st microstrip line the 43, the 12nd microstrip line the 46, the 13rd microstrip line 47, wherein said 9th microstrip line 41 and described 3rd open circuit minor matters 44 constitute a L-type, described 12nd microstrip line the 46, the tenth microstrip line the 42, the 13rd microstrip line 47 constitute one U-shaped, described 11st microstrip line 43 constitutes a L-type with described 4th open circuit minor matters 45.
The open circuit port of the first open circuit minor matters 31 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V21Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of the second open circuit minor matters 36 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V22Connect, the most respectively by series connection capacitance, varactor ground connection.
The open circuit port of the 3rd open circuit minor matters 44 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V31Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of the 4th open circuit minor matters 45 is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V32Connect, the most respectively by series connection capacitance, varactor ground connection.
D1For PIN diode, can be by controlling V1And then control its both end voltage and then control its open and-shut mode, when its two ends turn on, switch is in closure state, and wave filter is in bandstop mode, and when its two ends pressure drop is zero, PIN diode is in isolation, and wave filter is in bandpass mode.R1For the resistance of 1k resistance, it is not burned with protection PIN diode for limiting the size of current on PIN diode.D21、D22、D3、D41、D42It is all varactor, V21、V22And V31、V32For the control DC voltage of varactor, change the resonant frequency of resonator by changing the capacitance controlling DC voltage change varactor, and then realize the tunable characteristic of this wave filter.V41、V42For varactor D41、D42Direct-current control voltage, be used for controlling D41、D42Capacitance, and then control wave filter end coupling, control wave filter performance.C11-C42It is all capacitance, isolated DC voltage affecting or affecting the circuit outside port alternating current circuit.RF choke is high frequency choke coil, prevents the radiofrequency signal impact on DC source.Input port and output port are the coupling impedance of 50 ohm.
As shown in Figure 2, the microstrip line of above-mentioned resonator and composition has a following positional structure feature:
Wherein, first, second, third resonator becomes left-right symmetric relation with the perpendicular bisector of the tenth microstrip line 42.
Described first port microstrip line 23, described first microstrip line 21 are with described 3rd microstrip line 25, described 3rd port microstrip line 27 on the same line, described second port microstrip 24, described second microstrip line 22 are with described 4th microstrip line 26, described four-port microstrip 28 on the same line, described 7th microstrip line 32, described tenth microstrip line 35 are on the same line, parallel to each other between above-mentioned straight line；First open circuit minor matters 31, described first ground connection microstrip line 33, described 5th microstrip line 29, described 6th microstrip line 210, described second ground connection microstrip line 34, described second open circuit minor matters 36, described 3rd open circuit minor matters 44, described 4th open circuit minor matters 45, described 12nd microstrip line 46, described 13rd microstrip line 47 respectively place straight line between the most parallel to each other.
Needs further point out, and when described first open circuit minor matters 31, described 7th microstrip line 32, described micro-strip short-circuit line 33 work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding；
When described second open circuit minor matters 36, described 8th microstrip line 35, described micro-strip short-circuit line 34 work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding.
Simultaneously, the another aspect further pointed out, described 3rd open circuit minor matters 44 and described 4th open circuit minor matters 45, described 9th microstrip line 41, described tenth microstrip line 42, described 11st microstrip line 43, described 12nd microstrip line 46, described 13rd microstrip line 47 is needed to be equivalent to 1/2nd wavelength that during work of described wave filter, mid frequency is corresponding with the microstrip line length sum of equivalence during the work of varactor.
Further, described first microstrip line 21, described second microstrip line 22, described 3rd microstrip line 25, the length of described 4th microstrip line 26 are respectively greater than described 7th microstrip line 32 and the length of described 8th microstrip line 35.
Quarter-wave short-circuit line resonator equivalent circuit is parallel LC resonators, so loading varactor at its open end end to be equivalent on LC resonator adjustable electric capacity in parallel, thus the electric capacity of resonator can be changed by the capacitance of regulation varactor, and then by condition of resonanceResonant frequency can be controlled, and then realize the purpose of frequency-adjustable.And the open-circuit line resonator of 1/2nd wavelength is also equivalent to parallel LC resonators, therefore it controls the principle of resonant frequency as above.Therefore load varactor at open circuit minor matters end, and by controlling the magnitude of voltage of varactor, thus regulate the capacitance of varactor, and then regulate passband central frequency or the stopband center frequency of wave filter, it is achieved the frequency-adjustable of wave filter.The quarter-wave of corresponding wavelength when the first resonator and the second resonator (resonator of the varactor equivalence that i.e. microstrip line loads with it) work.3rd resonator (i.e. microstrip line and two open circuit minor matters end load varactor) work time corresponding wavelength 1/2nd.
Using simulation software Advanced Design System to emulate wave filter, the relative dielectric constant of the micro-strip substrate that the wave filter of this utility model design uses is 2.55, and medium level is 0.8mm
Fig. 3 is the ADS model of the varactor used, and this patent uses SMV 1408 (CV=4.08-0.95pF, RS=0.60 Ω, Cp=0.21pF, Ls=0.7nH).
Fig. 4 (a) shows when PIN diode is in isolation, and the scattering parameter simulation result of wave filter when i.e. switch is opened, wave filter now is bandpass mode.Transverse axis represents the signal frequency of microstrip filter in this utility model, and the longitudinal axis represents the return loss (S of wave filter11), return loss represents the relation between the input power of this port signal and the reflection power of signal, and its corresponding mathematical function is as follows: reflection power/incident power==20*log | S11|.Fig. 4 (b) shows the insertion loss (S of wave filter21) simulation result, insertion loss represents the relation between input power and the output of another port signal of a signal, and its corresponding mathematical function is: output/input power (dB)=20*log | S21|.It appeared that the range of accommodation of its bandpass mode frequency is 670MHz-1210MHz, and its return loss is above 18dB, function admirable.
When Fig. 5 (a) and Fig. 5 (b) shows PIN diode for conducting state, i.e. the scattering parameter simulation result of wave filter during switch Guan Bi, wave filter now is bandstop mode.It appeared that the range of accommodation of its bandpass mode frequency is 670MHz-1225MHz, and its degree of suppression is above 15dB, function admirable.
In sum, a kind of band filter that the utility model proposes and band elimination filter mutually switch and the design of frequency-adjustable of wave filter, the method utilizing open circuit minor matters to load varactor is designed, by the voltage of regulation transfiguration it is achieved thereby that the function of frequency-adjustable, the effect of PIN diode is then the mutual switching controlling to carry logical-band-stop response.Having flexible design, volume is little, low cost, the feature that characteristic is good.
Above-described embodiment is this utility model preferably embodiment; but embodiment of the present utility model is also not restricted to the described embodiments; other any without departing from the change made under spirit of the present utility model and principle, modify, substitute, combine, simplify; all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (10)
1. adjustable planar band leads to-a band elimination filter, is produced in the manner of a printed circuit board in double-sided copper-clad micro-strip plate (1), it is characterised in that:
Making respectively on the same face of described double-sided copper-clad micro-strip plate (1) and have feeder line port port1 and feeder line port port2, the first microstrip line (21), the second microstrip line (22), the 3rd microstrip line (25), the 4th microstrip line (26), the first resonator, the second resonator and the 3rd resonator for inputting or export electromagnetic wave signal, the another side of this double-sided copper-clad micro-strip plate (1) is for covering copper earth plate；
Wherein, described first resonator, the second resonator and the 3rd resonator are positioned at the same side of the straight line that input/output port port1 and port2 is constituted；
Described feeder line port port1 top half is connected with the first end of the first port microstrip line (23), and the second end of the first port microstrip line (23) is by series connection capacitance C11It is connected with the first end of described first microstrip line (21)；Described feeder line port port1 the latter half is connected with the first end of the second port microstrip line (24), and the second end of the second port microstrip line (24) is by series connection capacitance C12It is connected with the first end of described second microstrip line (22)；Described feeder line port port2 top half is connected with the second end of the 3rd port microstrip line (27), and the first end of the 3rd port microstrip line (27) is by series connection capacitance C13It is connected with the second end of described 3rd microstrip line (25)；Described feeder line port port2 the latter half is connected with the second end of four-port microstrip line (28), and the first end of four-port microstrip line (28) is by series connection capacitance C14It is connected with the second end of described 4th microstrip line (26)；Second end of described first microstrip line (21) is by series connection capacitance C21Being connected with the first end of the 5th microstrip line (29), the second end of the 5th microstrip line (29) is connected with the second end of described second microstrip line (22)；First end of described 3rd microstrip line (25) passes through capacitance C22Being connected with the first end of the 6th microstrip line (210), the second end of the 6th microstrip line (210) is connected with the first end of described 4th microstrip line (26)；External direct current power supply V simultaneously1By series connection high frequency choke coil RF choke and current-limiting resistance R1First end of described second microstrip line of rear access (22), the second end of described 4th microstrip line (26) is by series connection high frequency choke coil RF choke ground connection；Second end of described second microstrip line (22) passes through series connected PIN diodes D with the first end of described 4th microstrip line (26)1Connect.
The adjustable planar band of one the most according to claim 1 leads to-band elimination filter, it is characterised in that: by controlling external direct current power supply V1Voltage so that control described PIN diode D1Both end voltage, it is achieved described PIN diode D1The control of open and-shut mode, as described PIN diode D1Forward voltage more than 5V time, PIN diode two ends are fully on, the most described PIN diode D1Being in closure state, it is the connecting line between input and output port that described wave filter is in bandstop mode, described second microstrip line (22) and described 4th microstrip line (26)；When external direct current power supply V1 is zero, described PIN diode D1Disconnection is in isolation, and it is the feeder line between input and output port that described wave filter is in bandpass mode, described second microstrip line (22) and described 4th microstrip line (26).
The adjustable planar band of one the most according to claim 1 leads to-band elimination filter, it is characterised in that:
Described first resonator includes the first open circuit minor matters (31), the 7th microstrip line (32) and the first ground connection microstrip line (33), and described first open circuit minor matters (31), described 7th microstrip line (32) are U-shaped with described first ground connection microstrip line (33) composition one；Described second resonator includes the second open circuit minor matters (36), the 8th microstrip line (35) and the second ground connection microstrip line (34), and described second open circuit minor matters (36), described 8th microstrip line (35) are U-shaped with described second ground connection microstrip line (34) composition one；Described 3rd resonator includes the 3rd open circuit minor matters (44), 4th open circuit minor matters (45), 9th microstrip line (41), tenth microstrip line (42), 11st microstrip line (43), 12nd microstrip line (46), 13rd microstrip line (47), wherein said 9th microstrip line (41) and described 3rd open circuit minor matters (44) constitute a L-type, described 12nd microstrip line (46), described tenth microstrip line (42) and described 13rd microstrip line (47) composition one are U-shaped, described 11st microstrip line (43) constitutes a L-type with described 4th open circuit minor matters (45).
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
Described first, second, third resonator becomes left-right symmetric relation with the perpendicular bisector of described tenth microstrip line (42).
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
Described first port microstrip line (23), described first microstrip line (21) are with described 3rd microstrip line (25), described 3rd port microstrip line (27) on the same line, described second port microstrip line (24), described second microstrip line (22) are with described 4th microstrip line (26), described four-port microstrip (28) on the same line, described 7th microstrip line (32), described tenth microstrip line (35) are on the same line, parallel to each other between above-mentioned straight line；Described first open circuit minor matters (31), described first ground connection microstrip line (33), described 5th microstrip line (29), described 6th microstrip line (210), described second ground connection microstrip line (34), described second open circuit minor matters (36), described 3rd open circuit minor matters (44), described 4th open circuit minor matters (45), described 12nd microstrip line (46), described 13rd microstrip line (47) respectively place straight line between the most parallel to each other.
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
The open circuit port of described first open circuit minor matters (31) is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V21Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of described second open circuit minor matters (36) is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V22Connect, the most respectively by series connection capacitance, varactor ground connection.
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
The open circuit port of described 3rd open circuit minor matters (44) is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V31Connect, the most respectively by series connection capacitance, varactor ground connection；
The open circuit port of described 4th open circuit minor matters (45) is respectively by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V32Connect, the most respectively by series connection capacitance, varactor ground connection.
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
When described first open circuit minor matters (31), described 7th microstrip line (32), described first ground connection microstrip line (33) work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding；
When described second open circuit minor matters (36), described 8th microstrip line (35), described second ground connection microstrip line (34) work with varactor, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during work of described wave filter, mid frequency is corresponding.
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
Described 3rd open circuit minor matters (44) and described 4th open circuit minor matters (45), described 9th microstrip line (41), described tenth microstrip line (42), described 11st microstrip line (43), described 12nd microstrip line (46), described 13rd microstrip line (47) and the microstrip line length sum of equivalence during the work of varactor are equivalent to 1/2nd wavelength that during work of described wave filter, mid frequency is corresponding.
The adjustable planar band of one the most according to claim 3 leads to-band elimination filter, it is characterised in that:
Described first microstrip line (21), described second microstrip line (22), described 3rd microstrip line (25), the length of described 4th microstrip line (26) are respectively greater than described 7th microstrip line (32) and the length of described 8th microstrip line (35).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620089366.5U CN205646079U (en) | 2016-01-28 | 2016-01-28 | Adjustable plane band -pass - band elimination filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620089366.5U CN205646079U (en) | 2016-01-28 | 2016-01-28 | Adjustable plane band -pass - band elimination filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552494A (en) * | 2016-01-28 | 2016-05-04 | 华南理工大学 | Adjustable flat band-pass and band-stop filter |
| CN106785261A (en) * | 2017-01-09 | 2017-05-31 | 华东交通大学 | A kind of adjustable bandpass filter of arrowband trap |
| CN109713409A (en) * | 2019-01-30 | 2019-05-03 | 华南理工大学 | A kind of three band Planer filters based on multimode resonator |
-
2016
- 2016-01-28 CN CN201620089366.5U patent/CN205646079U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552494A (en) * | 2016-01-28 | 2016-05-04 | 华南理工大学 | Adjustable flat band-pass and band-stop filter |
| CN105552494B (en) * | 2016-01-28 | 2018-04-13 | 华南理工大学 | A kind of adjustable plane bandpass and band-rejection filter |
| CN106785261A (en) * | 2017-01-09 | 2017-05-31 | 华东交通大学 | A kind of adjustable bandpass filter of arrowband trap |
| CN106785261B (en) * | 2017-01-09 | 2019-08-09 | 华东交通大学 | A kind of adjustable bandpass filter of narrowband trap |
| CN109713409A (en) * | 2019-01-30 | 2019-05-03 | 华南理工大学 | A kind of three band Planer filters based on multimode resonator |
| CN109713409B (en) * | 2019-01-30 | 2023-11-03 | 华南理工大学 | Three-frequency-band plane filter based on multimode resonator |
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Granted publication date: 20161012 Termination date: 20190128 |