CN205790296U - A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters - Google Patents
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters Download PDFInfo
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- CN205790296U CN205790296U CN201620089367.XU CN201620089367U CN205790296U CN 205790296 U CN205790296 U CN 205790296U CN 201620089367 U CN201620089367 U CN 201620089367U CN 205790296 U CN205790296 U CN 205790296U
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Abstract
The utility model discloses a kind of tunable band-pass band elimination filter loaded based on open circuit minor matters, it is produced in the manner of a printed circuit board on double-sided copper-clad micro-strip plate, making respectively on the same face of described double-sided copper-clad micro-strip plate and have for inputting or export the feeder line port port1 and feeder line port port2 of electromagnetic wave signal, the first microstrip line, the second microstrip line, the first multimode loading resonator and the second multimode loading resonator, the another side of this double-sided copper-clad micro-strip plate is for covering copper earth plate.This wave filter loads varactor at open circuit minor matters end, 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 control.Wave filter disclosed in this utility model has can be in band filter and the plurality of advantages such as band elimination filter switches over, mid frequency is controlled, simple in construction, size are little.
Description
Technical field
This utility model relates to the technical field of plane microstrip filter, particularly to a kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters.
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
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, a kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters is provided, this wave filter loads varactor at open circuit minor matters end, the capacitance of varactor is regulated by controlling the voltage of varactor, and then the mid frequency of regulation wave filter, and carry the regulation of logical-band-stop response by PIN diode control.
The purpose of this utility model is achieved through the following technical solutions:
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters, 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, first multimode loading resonator and the second multimode loading resonator, the another side of this double-sided copper-clad micro-strip plate 1 is for covering copper earth plate；
Wherein, described feeder line port port1, described feeder line port port2, described first microstrip line 21, described second microstrip line 22 are located along the same line, and described first multimode loads resonator and described second multimode loads resonator and lays respectively at the both sides of straight line；
Described feeder line port port1 is connected with the first end of described first microstrip line 21 by series connection capacitance C7, described feeder line port port2 is connected with the second end of described second microstrip line 22 by series connection capacitance C8, and the second end of described first microstrip line 21 is connected by series connected PIN diodes D7 with the first end of described second microstrip line 22；External direct current power supply V3 is by accessing the first end of described first microstrip line 21 after series connection high frequency choke coil RF choke and current-limiting resistance R simultaneously, and the second end of described second microstrip line 22 is by series connection high frequency choke coil RF choke ground connection.
Further, by controlling the voltage of described external direct current power supply V3 and then controlling the both end voltage of described PIN diode D7, realize the control of described PIN diode D7 open and-shut mode, when described PIN diode D7 closure state, its two ends turn on, it is the connecting line between input and output port that described wave filter is in bandstop mode, described first microstrip line 21 and described second microstrip line 22；When described PIN diode D7 isolation, its two ends disconnect, and it is the feeder line between input and output port that described wave filter is in bandpass mode, described first microstrip line 21 and described second microstrip line 22.
Further, described first multimode loads resonator and is mirrored into symmetry or reverse symmetry with described second microstrip line 22 place straight line for axis of symmetry with described first microstrip line 21 with described second multimode loading resonator.
Further, described first multimode loads resonator and includes the first open circuit minor matters 3, second open circuit minor matters 4 and the 3rd open circuit minor matters 5, wherein said first open circuit minor matters 3 include the 3rd microstrip line 31 and the 4th microstrip line 32, wherein said 3rd microstrip line 31 and described 4th microstrip line 32 vertically connect and compose L-type, wherein said second open circuit minor matters 4 include the 5th microstrip line 41 and the 6th microstrip line 42, wherein said 5th microstrip line 41 and described 6th microstrip line 42 vertically connect and compose L-type, described 3rd open circuit minor matters 5 are connected and composed with U-shaped 8th microstrip line 52 by linear type the 7th microstrip line 51, one end and described 5th microstrip line 41 one end straight line of described 3rd microstrip line 31 connect, said two devices is vertical with one end of described 7th microstrip line 51 respectively to be connected；
Described second multimode loads resonator and includes the 4th open circuit minor matters 6, 5th open circuit minor matters 7 and the 6th open circuit minor matters 8, wherein said 4th open circuit minor matters 6 include the 9th microstrip line 61 and the tenth microstrip line 62, wherein said 9th microstrip line 61 and described tenth microstrip line 62 vertically connect and compose L-type, wherein said 5th open circuit minor matters 7 include the 11st microstrip line the 71 and the 12nd microstrip line 72, wherein said 11st microstrip line 71 and described 12nd microstrip line 72 vertically connect and compose L-type, described 6th open circuit minor matters 8 are connected and composed with U-shaped 14th microstrip line 82 by linear type the 13rd microstrip line 81, one end and described 11st microstrip line 71 one end straight line of described 9th microstrip line 61 connect, said two devices is vertical with one end of described 13rd microstrip line 81 respectively to be connected.
Further, described 9th microstrip line 61 and described 11st microstrip line 71 place straight line, described 3rd microstrip line 31 and described 5th microstrip line 41 place straight line are parallel to each other with described first microstrip line 21 and described second microstrip line 22 place straight line respectively, and adjacent there is coupling gap.
Further, described first open circuit minor matters 3, described second open circuit minor matters 4, described 4th open circuit minor matters 6 are connected by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V1, the most respectively by series connection capacitance, varactor ground connection respectively with the open circuit port of described 5th open circuit minor matters 7.
Further, described 3rd open circuit minor matters 5 are connected by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V2, the most respectively by series connection capacitance, varactor ground connection respectively with the open circuit port of described 6th open circuit minor matters 8.
Further, when the microstrip line of described first open circuit minor matters 3, described second open circuit minor matters 4, described 4th open circuit minor matters 6 and described 5th open circuit minor matters 7 works with varactor respectively, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding.
Further, when the microstrip line of described 3rd open circuit minor matters 5 and described 6th open circuit minor matters 8 works with varactor respectively, the length sum of equivalence is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding.
Further, described first microstrip line 21 is respectively greater than described 3rd microstrip line 31 and the length of described 5th microstrip line 41 with the length requirement of described second microstrip line 22.
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 easily, and wherein, the adjustable extent of bandpass mode is 675MHz-975MHz, and the adjustable extent of bandstop mode is 695MHz-1000MHz.
3, 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 is the structural representation of a kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters disclosed in this utility model；
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；
1-double-sided copper-clad micro-strip plate, 21-the first microstrip line, 22-the second microstrip line, 3-first opens a way minor matters, 31-the 3rd microstrip line, 32-the 4th microstrip line, 4-second opens a way minor matters, 41-the 5th microstrip line, 42-the 6th microstrip line, 5-the 3rd opens a way minor matters, 51-the 7th microstrip line, 52-the 8th microstrip line, 6-the 4th opens a way minor matters, 61-the 9th microstrip line, 62-the tenth microstrip line, 7-the 5th opens a way minor matters, 71-the 11st microstrip line, 72-the 12nd microstrip line, 8-the 6th opens a way minor matters, 81-the 13rd microstrip line, 82-the 14th microstrip line.
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 tunable band-pass-band elimination filter loaded based on open circuit minor matters disclosed in the present embodiment, it is produced in the manner of a printed circuit board on double-sided copper-clad micro-strip plate 1, make respectively on the same face of described double-sided copper-clad micro-strip plate 1 and have the feeder line port port1 and feeder line port port2 for inputting or export electromagnetic wave signal, first microstrip line 21, second microstrip line 22, first multimode loads resonator and the second multimode loads resonator, the another side of this double-sided copper-clad micro-strip plate 1 is for covering copper earth plate.
First microstrip line 21 and the second microstrip line 22 are the feeder line between input and output port in the bandpass mode of wave filter, are also the connecting lines under the bandstop mode of wave filter between two ports simultaneously.
Wherein, described feeder line port port1, described feeder line port port2, described first microstrip line 21, described second microstrip line 22 are located along the same line, and described first multimode loads resonator and described second multimode loads resonator and lays respectively at the both sides of straight line.
Described feeder line port port1 is connected with the first end of described first microstrip line 21 by series connection capacitance C7, described feeder line port port2 is connected with the second end of described second microstrip line 22 by series connection capacitance C8, and the second end of described first microstrip line 21 is connected by series connected PIN diodes D7 with the first end of described second microstrip line 22；External direct current power supply V3 is by accessing the first end of described first microstrip line 21 after series connection high frequency choke coil RF choke and current-limiting resistance R simultaneously, and the second end of described second microstrip line 22 is by series connection high frequency choke coil RF choke ground connection.
By controlling the voltage of described external direct current power supply V3 and then controlling the both end voltage of described PIN diode D7, realize the control of described PIN diode D7 open and-shut mode, when described PIN diode D7 closure state, its two ends turn on, it is the connecting line between input and output port that described wave filter is in bandstop mode, described first microstrip line 21 and described second microstrip line 22；When described PIN diode D7 isolation, its two ends disconnect, and it is the feeder line between input and output port that described wave filter is in bandpass mode, described first microstrip line 21 and described second microstrip line 22.
D7 is PIN diode, by controlling external direct current power supply V3 and then its both end voltage can be controlled and then control its open and-shut mode, when its two ends turn on, switch is in closure state, wave filter is in bandstop mode, when its two ends pressure drop is zero, PIN diode is in isolation, and wave filter is in bandpass mode.R is resistance, is not burned with protection PIN diode for limiting the size of current on PIN diode.Input/output end port is the coupling impedance of 50 ohm.
As shown in Figure 2, the first multimode loads resonator and the second multimode loads resonator and is mirrored into symmetry or reverse symmetry with described second microstrip line 22 place straight line for axis of symmetry with the first microstrip line 21.
Wherein, first multimode loads resonator and includes the first open circuit minor matters 3, second open circuit minor matters 4 and the 3rd open circuit minor matters 5, wherein the first open circuit minor matters 3 include the 3rd microstrip line 31 and the 4th microstrip line 32, wherein said 3rd microstrip line 31 and described 4th microstrip line 32 vertically connect and compose L-type, wherein said second open circuit minor matters 4 include the 5th microstrip line 41 and the 6th microstrip line 42, wherein said 5th microstrip line 41 and described 6th microstrip line 42 vertically connect and compose L-type, described 3rd open circuit minor matters 5 are connected and composed with U-shaped 8th microstrip line 52 by linear type the 7th microstrip line 51, one end and described 5th microstrip line 41 one end straight line of described 3rd microstrip line 31 connect, said two devices is vertical with one end of described 7th microstrip line 51 respectively to be connected.
Wherein, second multimode loads resonator and includes the 4th open circuit minor matters 6, 5th open circuit minor matters 7 and the 6th open circuit minor matters 8, wherein said 4th open circuit minor matters 6 include the 9th microstrip line 61 and the tenth microstrip line 62, wherein said 9th microstrip line 61 and described tenth microstrip line 62 vertically connect and compose L-type, wherein said 5th open circuit minor matters 7 include the 11st microstrip line the 71 and the 12nd microstrip line 72, wherein said 11st microstrip line 71 and described 12nd microstrip line 72 vertically connect and compose L-type, described 6th open circuit minor matters 8 are connected and composed with U-shaped 14th microstrip line 82 by linear type the 13rd microstrip line 81, one end and described 11st microstrip line 71 one end straight line of described 9th microstrip line 61 connect, said two devices is vertical with one end of described 13rd microstrip line 81 respectively to be connected.
Described 9th microstrip line 61 and described 11st microstrip line 71 place straight line, described 3rd microstrip line 31 and described 5th microstrip line 41 place straight line are parallel to each other with the first microstrip line 21 and the second microstrip line 22 place straight line respectively, and adjacent there is coupling gap.
As shown in Figure 2, first open circuit minor matters the 3, second open circuit minor matters the 4, the 4th open circuit minor matters 6 are connected with external direct current power supply V1 by series connection capacitance C1-C2 and C4-C5, high frequency choke coil RFchoke, the most respectively by corresponding above-mentioned capacitance, varactor D1-D2 and the D4-D5 ground connection connected respectively with the open circuit port of the 5th open circuit minor matters 7.
3rd open circuit minor matters 5 are connected by series connection capacitance C3 with C6, high frequency choke coil RF choke and external direct current power supply V2, the most respectively by corresponding above-mentioned capacitance, varactor D3 and the D6 ground connection connected respectively with the open circuit port of the 6th open circuit minor matters 8.
Above-mentioned D1-D6 is varactor, and external direct current power supply V1 and V2 is the control DC voltage of varactor, changes the resonant frequency of resonator by changing the capacitance controlling DC voltage change varactor, and then realizes the tunable characteristic of this wave filter.C1-C8 is capacitance, external DC voltage affecting or affecting the circuit outside port alternating current circuit.The effect of capacitance is to isolate the impact on other varactors or PIN switching diode of each external direct current power supply or the impact for port external circuit, because the present embodiment takes bigger and suitable capacitance, so it is short-circuit for radiofrequency signal, frequency or the performance of radio circuit can't be affected, only served every straight effect.RF choke is high frequency choke coil, prevents the radiofrequency signal impact on DC source.
Wherein, the microstrip line of first open circuit minor matters the 3, second open circuit minor matters the 4, the 4th open circuit minor matters 6 and the 5th open circuit minor matters 7 is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding respectively with the length sum of corresponding varactor.
When the microstrip line of the 3rd open circuit minor matters 5 and the 6th open circuit minor matters 8 works with varactor respectively, the length sum of equivalence is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding.
The length of the first microstrip line 21 and the second microstrip line 22 is respectively greater than the 3rd microstrip line 31 and the length of the 5th microstrip line 41.
Quarter-wave open-circuit line resonator equivalent circuit is series LC resonator, so loading varactor at its 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.This patent uses multimode resonator, and its main transmission line is to be made up of two quarter-wave open-circuit resonant devices, and the open circuit minor matters loaded in centre are also quarter-wave open-circuit line resonators.Can be obtained can being changed the parity mode resonant frequency of resonator by regulation main resonator end varactor capacitance by odd-even mode analytical method, the varactor capacitance of the open-circuit line end loaded in the middle of changing can change the even mould resonant frequency of resonator, the overlap of the parity mode resonant frequency of wave filter can be realized by suitable regulation, and we can realize the regulation of resonant frequency very easily by the capacitance of change varactor.During resonator (resonator of varactor that i.e. microstrip line loads with it equivalence) work 1/4th of corresponding wavelength.
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 1405 (CV=2.67-0.63pF, RS=0.80 Ω, Cp=0.29pF, 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 675MHz-975MHz, and its return loss is above 20dB, 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 695MHz-1000MHz, 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. tunable band-pass-the band elimination filter loaded based on open circuit minor matters, is produced in double-sided copper-clad micro-strip plate (1) in the manner of a printed circuit board, it is characterised in that:
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, the first microstrip line (21), the second microstrip line (22), the first multimode loading resonator and the second multimode loading resonator, the another side of this double-sided copper-clad micro-strip plate (1) is for covering copper earth plate；
Wherein, described feeder line port port1, described feeder line port port2, described first microstrip line (21), described second microstrip line (22) are located along the same line, and described first multimode loads resonator and described second multimode loads resonator and lays respectively at the both sides of straight line；
Described feeder line port port1 is connected with the first end of described first microstrip line (21) by series connection capacitance C7, described feeder line port port2 is connected with the second end of described second microstrip line (22) by series connection capacitance C8, and the second end of described first microstrip line (21) is connected by series connected PIN diodes D7 with the first end of described second microstrip line (22)；External direct current power supply V3 is by accessing the first end of described first microstrip line (21) after series connection high frequency choke coil RF choke and current-limiting resistance R simultaneously, and the second end of described second microstrip line (22) is by series connection high frequency choke coil RF choke ground connection.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 1, it is characterised in that:
By controlling the voltage of described external direct current power supply V3 and then controlling the both end voltage of described PIN diode D7, realize the control of described PIN diode D7 open and-shut mode, when described PIN diode D7 closure state, its two ends turn on, described wave filter is in bandstop mode, and described first microstrip line (21) and described second microstrip line (22) are the connecting line between input and output port；When described PIN diode D7 isolation, its two ends disconnect, and described wave filter is in bandpass mode, and described first microstrip line (21) and described second microstrip line (22) are the feeder line between input and output port.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 1, it is characterised in that:
Described first multimode loads resonator and loads resonator with described first microstrip line (21) and described second microstrip line (22) place straight line with described second multimode is that axis of symmetry is mirrored into symmetry or reverse symmetry.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 3, it is characterised in that:
nullDescribed first multimode loads resonator and includes the first open circuit minor matters (3)、Second open circuit minor matters (4) and the 3rd open circuit minor matters (5)，Wherein said first open circuit minor matters (3) includes the 3rd microstrip line (31) and the 4th microstrip line (32)，Wherein said 3rd microstrip line (31) and described 4th microstrip line (32) vertically connect and compose L-type，Wherein said second open circuit minor matters (4) includes the 5th microstrip line (41) and the 6th microstrip line (42)，Wherein said 5th microstrip line (41) and described 6th microstrip line (42) vertically connect and compose L-type，Described 3rd open circuit minor matters (5) is connected and composed with U-shaped 8th microstrip line (52) by linear type the 7th microstrip line (51)，One end and described 5th microstrip line (41) one end straight line of described 3rd microstrip line (31) connect，Said two devices is vertical with one end of described 7th microstrip line (51) respectively to be connected；
nullDescribed second multimode loads resonator and includes the 4th open circuit minor matters (6)、5th open circuit minor matters (7) and the 6th open circuit minor matters (8)，Wherein said 4th open circuit minor matters (6) includes the 9th microstrip line (61) and the tenth microstrip line (62)，Wherein said 9th microstrip line (61) and described tenth microstrip line (62) vertically connect and compose L-type，Wherein said 5th open circuit minor matters (7) includes the 11st microstrip line (71) and the 12nd microstrip line (72)，Wherein said 11st microstrip line (71) and described 12nd microstrip line (72) vertically connect and compose L-type，Described 6th open circuit minor matters (8) is connected and composed with U-shaped 14th microstrip line (82) by linear type the 13rd microstrip line (81)，One end and described 11st microstrip line (71) one end straight line of described 9th microstrip line (61) connect，Said two devices is vertical with one end of described 13rd microstrip line (81) respectively to be connected.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 4, it is characterised in that:
Described 9th microstrip line (61) is parallel to each other with described first microstrip line (21) and described second microstrip line (22) place straight line with described 5th microstrip line (41) place straight line respectively with described 11st microstrip line (71) place straight line, described 3rd microstrip line (31), and adjacent there is coupling gap.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 4, it is characterised in that:
Described first open circuit minor matters (3), described second open circuit minor matters (4), described 4th open circuit minor matters (6) are connected by series connection capacitance, high frequency choke coil RFchoke and external direct current power supply V1 with the open circuit port of described 5th open circuit minor matters (7), respectively the most respectively by series connection capacitance, varactor ground connection.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 4, it is characterised in that:
Described 3rd open circuit minor matters (5) is connected by series connection capacitance, high frequency choke coil RF choke and external direct current power supply V2 respectively with the open circuit port of described 6th open circuit minor matters (8), the most respectively by series connection capacitance, varactor ground connection.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 6, it is characterised in that:
When the microstrip line of described first open circuit minor matters (3), described second open circuit minor matters (4), described 4th open circuit minor matters (6) and described 5th open circuit minor matters (7) works with varactor respectively, the microstrip line length sum of equivalence is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 7, it is characterised in that:
The microstrip line of described 3rd open circuit minor matters (5) and described 6th open circuit minor matters (8) is equivalent to the quarter-wave that during described tunable band-pass-band elimination filter work, mid frequency is corresponding respectively with the microstrip line length sum of equivalence during the work of varactor.
A kind of tunable band-pass-band elimination filter loaded based on open circuit minor matters the most according to claim 4, it is characterised in that:
The length requirement of described first microstrip line (21) and described second microstrip line (22) is respectively greater than the length of described 3rd microstrip line (31) and described 5th microstrip line (41).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529515A (en) * | 2016-01-28 | 2016-04-27 | 华南理工大学 | Adjustable bandpass-bandstop filter based on loading on open circuit branch |
| CN106785261A (en) * | 2017-01-09 | 2017-05-31 | 华东交通大学 | A kind of adjustable bandpass filter of arrowband trap |
| CN107196671A (en) * | 2017-04-15 | 2017-09-22 | 深圳市景程信息科技有限公司 | Sender unit with broadband Out-of-band rejection |
| CN110061333A (en) * | 2019-04-04 | 2019-07-26 | 电子科技大学 | A kind of microwave electricity tune bandstop filter of high degree of suppression and broad tuning range |
| CN114024108A (en) * | 2021-10-28 | 2022-02-08 | 南湖实验室 | Miniaturized reconfigurable microstrip low-pass filter |
-
2016
- 2016-01-28 CN CN201620089367.XU patent/CN205790296U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529515A (en) * | 2016-01-28 | 2016-04-27 | 华南理工大学 | Adjustable bandpass-bandstop filter based on loading on open circuit branch |
| CN105529515B (en) * | 2016-01-28 | 2018-04-13 | 华南理工大学 | A kind of tunable band-pass bandstop filter based on open circuit minor matters loading |
| 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 |
| CN107196671A (en) * | 2017-04-15 | 2017-09-22 | 深圳市景程信息科技有限公司 | Sender unit with broadband Out-of-band rejection |
| CN110061333A (en) * | 2019-04-04 | 2019-07-26 | 电子科技大学 | A kind of microwave electricity tune bandstop filter of high degree of suppression and broad tuning range |
| CN110061333B (en) * | 2019-04-04 | 2021-04-06 | 电子科技大学 | Microwave electrically tunable band-stop filter with high suppression degree and wide tuning range |
| CN114024108A (en) * | 2021-10-28 | 2022-02-08 | 南湖实验室 | Miniaturized reconfigurable microstrip low-pass filter |
| CN114024108B (en) * | 2021-10-28 | 2022-10-11 | 南湖实验室 | Miniaturized reconfigurable microstrip low-pass filter |
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