CN108832237A - A kind of two-band reconfigurable filter based on SIR load PIN diode structure - Google Patents
A kind of two-band reconfigurable filter based on SIR load PIN diode structure Download PDFInfo
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- CN108832237A CN108832237A CN201810433580.1A CN201810433580A CN108832237A CN 108832237 A CN108832237 A CN 108832237A CN 201810433580 A CN201810433580 A CN 201810433580A CN 108832237 A CN108832237 A CN 108832237A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
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Abstract
The invention proposes a kind of two-band reconfigurable filter based on SIR load PIN diode structure, including medium substrate, the microstrip circuitry on matter substrate of printing, the metal being arranged under medium substrate applies copper, and metal applies copper ground connection；Upper layer microstrip circuitry of the present invention includes three U-shaped SIR resonators and signal coupling line, and SIR resonator one is located at coupling line top, and SIR resonator two and SIR resonator three are located at symmetrical below signal coupling line.The load of load PIN diode matching connection or impedance line on the resonator, the reconfigurable function of filter is realized by regulation PIN switching diode.Two-band reconfigurable filter based on SIR load PIN diode structure of the invention has the characteristics that big band connection frequency jump range, compact-sized, low spurious frequency, two frequency ranges are mutually isolated big.
Description
Technical field
It is especially a kind of based on the double of SIR load PIN diode structure the present invention relates to reconfigurable filter technical field
Frequency range reconfigurable filter.
Background technique
With the fast development of electronic countermeasure, for the anti-interference ability for improving fuze system, modern Fuze Technology towards
The trend development of multiband, more systems.Different working frequency range and operating mode, receiving and transmitting front end need to use in multiple and different
The filter group of frequency of heart composition carries out frequency selection.The shortcomings that filter group is that system architecture is made to become complicated, is increased
System dimension brings significant loss, does not meet current receiving and transmitting front end circuit miniaturization, integrated, low energy consumption main trend.
Therefore, it is desirable to realize the function of multiple filters with a filter, this can be made up well using RF reconfigurable technology
One defect.But the method that the reconfigurable filter research reported at present mostly uses greatly load tunable capacitance, realizes L, in S-band
The tuning of frequency small range, is much unable to satisfy the requirement of multiband, more system fuze systems.
Summary of the invention
It is an object of the invention to be directed to the deficiency of above-mentioned background technique, meet what radio-frequency front-end switched wide range of frequencies
Demand proposes a kind of two-band reconfigurable filter based on SIR load PIN diode structure.
Realize that technical solution of the invention is：A kind of two-band based on SIR load PIN diode structure is restructural
Filter, including medium substrate, the microstrip circuitry on matter substrate of printing, the metal being arranged under medium substrate apply copper,
And metal applies copper ground connection；The microstrip circuitry includes SIR resonator one, SIR resonator two, SIR resonator three, signal coupling
Line, impedance matching line and filter output, wherein resonator one is the U-shaped resonator of symmetrical structure, including U-shaped resonator pair
Arm and U-shaped resonator crossbeam；The SIR resonator two is identical with SIR resonator three, is the U-shaped humorous of unsymmetric structure
Shake device, and SIR resonator two and SIR resonator three are located at the outside of U-shaped resonator crossbeam and SIR resonator two and SIR resonator
Three about resonator one middle line it is symmetrical；The signal coupling line is along U-shaped resonator crossbeam and SIR resonator two, SIR resonator
Gap setting and the both ends of signal coupling line between three are connect with one end of impedance matching line respectively, impedance matching line it is another
End is connect with filter output.
Compared with prior art, the present invention its remarkable advantage is：
(1) compared with current some reconfigurable filters, it is big that band connection frequency jumps range.
(2) using the structure for separating the resonator of passband under filter and upper passband, two passbands of filter
Centre frequency, bandwidth and can be separately adjustable with internal characteristic.
(3) it uses SIR resonator technologies to keep overall structure more compact and reduces resonator generation and be not intended to out
Existing spurious frequency.
(4) based on the ingehious design of coupled structure, two passbands when regulating and controlling PIN switching diode switching frequency
Influence each other it is very small.
Further detailed description is done to the present invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the printed circuit board that the present invention uses.
Fig. 2 is the schematic top plan view of microstrip circuitry in the present invention.
Fig. 3 is that dual-passband of the present invention opens S parameter emulation schematic diagram, using HFSS and ADS associative simulation.
Fig. 4 is that passband is opened under the present invention, and upper passband closes S parameter and emulates schematic diagram, is combined using HFSS and ADS imitative
Very.
Fig. 5 is that passband is closed under the present invention, and upper passband opens S parameter and emulates schematic diagram, is combined using HFSS and ADS imitative
Very.
Fig. 6 is that dual-passband of the present invention closes S parameter emulation schematic diagram, using HFSS and ADS associative simulation.
Specific embodiment
The invention discloses a kind of two-band reconfigurable filters based on SIR load PIN diode structure, including medium
Substrate 1, the microstrip circuitry 2 on matter substrate 1 of printing, the metal being arranged under medium substrate 1 applies copper 3, and metal applies copper 3
Ground connection；The microstrip circuitry 2 includes SIR resonator 1, SIR resonator 2 22, SIR resonator 3 23, signal coupling line
24, impedance matching line 25 and filter output 26, wherein resonator 1 is the U-shaped resonator of symmetrical structure, including U-shaped humorous
Shake device both arms 211 and U-shaped resonator crossbeam 212；The SIR resonator 2 22 is identical with SIR resonator 3 23, is non-
The U-shaped resonator of symmetrical structure, SIR resonator 2 22 and SIR resonator 3 23 be located at the outside of U-shaped resonator crossbeam 212 and
SIR resonator 2 22 and SIR resonator 3 23 are symmetrical about the middle line of resonator 1；The signal coupling line 24 is along U-shaped humorous
The both ends point of the gap setting and signal coupling line 24 shaken between device crossbeam 212 and SIR resonator 2 22, SIR resonator 3 23
It is not connect with one end of impedance matching line 25, the other end of impedance matching line 25 is connect with filter output 26.
In further embodiment, the port of the U-shaped resonator both arms 211 is set as opening a way, the U-shaped resonator crossbeam
212 be high impedance line, extends along direction at U-shaped 212 both ends of resonator crossbeam and is separately connected one section of coupling extended line 213.
In further embodiment, coupling 213 length of extended line is 2.6mm
In further embodiment, the SIR resonator 2 22 includes U-shaped resonator left arm 221, U-shaped resonator right arm
222 and U-shaped resonator crossbeam 223, the U-shaped resonator crossbeam 223 is high impedance line, the U-shaped resonator left arm 221, U-shaped
The port of resonator right arm 222 is set as opening a way.
Preferably, the U-shaped resonator right arm 222 of the SIR resonator 2 22 is connect with PIN diode 3 283, PIN bis-
3 283 other end of pole pipe connects open-ended line 263；The U-shaped resonator left arm 232 and PIN diode four of SIR resonator 3 23
284 connections, 4 284 other end of PIN diode connect impedance line 2 262,2 262 other end of impedance line and matched load 2 272
Connection.
Preferably, the open-ended line 263 is four/wavelength, and 2 262 characteristic impedance of impedance line is 50 ohm,
2 272 impedance of matched load is 50 ohm.
In further embodiment, the port of U-shaped resonator both arms 211 connects with one end of PIN diode 1 respectively
Connect, the other end of PIN diode 1 is connect with one end of impedance line 1, the other end of impedance line 1 with match it is negative
Carry one 271 connections.
Preferably, the characteristic impedance of impedance line 1 is 50 ohm, and the impedance of the matched load 1 is 50 ohm.
Preferably, the SIR resonator 1 couples spacing and SIR resonator 2 22, SIR resonance with signal coupling line 24
Device 3 23 is identical as the coupling of signal coupling line 24 spacing.
Preferably, the signal coupling line 24 includes left signal coupling line 241 and right signal coupling line 242, left signal coupling
Zygonema 241 and right signal coupling line 242 are symmetrical about one 21 middle line of resonator.
Below with reference to embodiment, the present invention will be further described.
Embodiment 1
As shown in Figure 1, the two-band reconfigurable filter based on SIR load PIN diode structure of the present embodiment, including
Medium substrate, can be used Rogers4350 substrate herein, and relative dielectric constant 3.66 can also be adopted with a thickness of 1.524mm
With the substrate of other specifications.Microstrip circuitry is printed on the medium substrate, microstrip circuitry uses material with good conductivity
Material, the copper that material uses with a thickness of 1 ounce herein, and use craft of gilding.Metal under the medium substrate applies copper as whole
A filter.
As shown in Fig. 2, microstrip circuitry includes three U-shaped SIR resonators, two segment signal coupling lines, impedance matching line, four
A PIN switching diode, open-ended line, three impedance lines and three matched loads.Wherein SIR resonator is first is that symmetrical U
Type structure, positioned at the top of signal coupling line middle, coupling spacing is 0.2mm；U resonator both arms length is 3.8mm, width
For 4.16mm；U resonator crossbeam length is 8mm, width 1.1mm；Likewise, it is 2.6mm that two sections of couplings, which extend line length, it is wide
Degree is 1.1mm.SIR resonator two and SIR resonator three is symmetrical about Y-axis, is asymmetric U-shaped structure, is located at signal coupling
Below zygonema, coupling spacing is 0.2mm；U-shaped resonator left arm is length 3.6mm, width 1.9mm；U-shaped resonator right arm is long
Degree is 3.6mm, width 1.26mm；U-shaped resonator crossbeam length is 3.7mm, width 0.86mm.Two segment signal coupling lines close
Symmetrical in Y-axis, coupling spacing is 0.9mm, length 13.5mm, width 1.1mm.Impedance matching line is connected with signal coupling line
It connects, in order to reduce filter size, is turned toward Y direction, further do corner cut in corner, reduce reflection to preferably
Matching is adjusted, impedance matching line length is 19mm, width 1.5mm.
The U resonator both arms open end connection PIN diode one and switching diode two of SIR resonator one, PIN switch two
It is 50 ohm microstrips that the pole pipe other end, which connects impedance, and width 3.3mm is connected to 50 ohm of matched loads.Pass through control
The bias voltage of PIN switching diode carrys out the closure of control switch, when PIN diode one and the closing of PIN diode two, filtering
Passband is opened under device；When PIN diode one and PIN diode two are opened, passband is closed under filter.
The U resonator right arm of SIR resonator two connects PIN diode three, and three other end of PIN diode connects four/wave
Long open-ended line, length 7mm, width 1.26mm.The U resonator left arm of SIR resonator three connects PIN diode four,
It is 50 ohm microstrips that the PIN switching diode other end, which connects impedance, and width 3.3mm is connected to 50 ohm of matched loads.
By controlling the bias voltage of PIN switching diode come the closure of control switch, when PIN diode three and PIN diode four close
When closing, passband is opened on filter；When PIN diode three and PIN diode four are opened, passband is closed on filter.
Band logical scattering parameters as shown in Fig. 3,4,5,6, under four kinds of switch conditions of reconfigurable filter respectively of the present invention
Simulation result.From simulation result, when two passbands are switched on, lower passband central frequency is 2.5GHz, and three dB bandwidth is
230MHz, relative bandwidth 9.2% are less than 0.6dB with interior Insertion Loss；Upper passband central frequency is 5.7GHz, and three dB bandwidth is
440MHz, relative bandwidth 7.2% are less than 1dB with interior Insertion Loss.Instantly passband is opened upper passband and is closed, lower passband central frequency
For 2.5GHz, three dB bandwidth 240MHz, relative bandwidth 9.2% is less than 1.5dB with interior Insertion Loss.Instantly passband closes upper passband
When unlatching, upper passband central frequency is 5.7GHz, three dB bandwidth 410MHz, and relative bandwidth 7.2% is less than with interior Insertion Loss
1dB.When upper and lower passband is all closed, filter minimal attenuation -18dB in 1-7GHz frequency band.It is concluded that：Based on SIR plus
The two-band reconfigurable filter of PIN diode structure is carried before and after carrying out frequency error factor, pass filter performance is kept substantially
It is constant, and up and down passband influence each other it is very small.
Claims (10)
1. a kind of two-band reconfigurable filter based on SIR load PIN diode structure, which is characterized in that including medium base
Plate (1), the microstrip circuitry (2) on matter substrate (1) of printing, the metal being arranged under medium substrate (1) apply copper (3), and
Metal applies copper (3) ground connection；The microstrip circuitry (2) includes SIR resonator one (21), SIR resonator two (22), SIR resonance
Device three (23), signal coupling line (24), impedance matching line (25) and filter output (26), wherein resonator one (21) is pair
Claim the U-shaped resonator of structure, including U-shaped resonator both arms (211) and U-shaped resonator crossbeam (212)；The SIR resonator two
(22) identical with SIR resonator three (23), it is the U-shaped resonator of unsymmetric structure, SIR resonator two (22) and SIR
Resonator three (23) is located at the outside of U-shaped resonator crossbeam (212) and SIR resonator two (22) and SIR resonator three (23) close
It is symmetrical in the middle line of resonator one (21)；The signal coupling line (24) is along U-shaped resonator crossbeam (212) and SIR resonator two
(22), between SIR resonator three (23) gap setting and signal coupling line (24) both ends respectively with impedance matching line (25)
One end connection, the other end of impedance matching line (25) connect with filter output (26).
2. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, the port of the U-shaped resonator both arms (211) is set as opening a way, and the U-shaped resonator crossbeam (212) is high impedance line,
U-shaped resonator crossbeam (212) both ends extend along direction and are separately connected one section of coupling extended line (213).
3. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, coupling extended line (213) length is 2.6mm.
4. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, the SIR resonator two (22) includes U-shaped resonator left arm (221), U-shaped resonator right arm (222) and U-shaped resonator
Crossbeam (223), the U-shaped resonator crossbeam (223) are high impedance line, and the U-shaped resonator left arm (221), U-shaped resonator are right
The port of arm (222) is set as opening a way.
5. the two-band reconfigurable filter according to claim 4 based on SIR load PIN diode structure, feature
It is, the U-shaped resonator right arm (222) of the SIR resonator two (22) connect with PIN diode three (283), PIN diode
Three (283) other ends connect open-ended line (263)；The U-shaped resonator left arm (232) of SIR resonator three (23) and bis- pole PIN
Guan Si (284) connection, PIN diode four (284) other end connect impedance line two (262), impedance line two (262) other end with
With the connection of two (272) of load.
6. the two-band reconfigurable filter according to claim 5 based on SIR load PIN diode structure, feature
It is, the open-ended line (263) is four/wavelength, and impedance line two (262) characteristic impedance is 50 ohm, described
It is 50 ohm with two (272) impedances of load.
7. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, the port of U-shaped resonator both arms (211) is connect with one end of PIN diode one (281) respectively, PIN diode one
(281) the other end is connect with one end of impedance line one (261), the other end and matched load one (271) of impedance line one (261)
Connection.
8. the two-band reconfigurable filter according to claim 7 based on SIR load PIN diode structure, feature
It is, the characteristic impedance of impedance line one (261) is 50 ohm, and the impedance of the matched load one (271) is 50 ohm.
9. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, the SIR resonator one (21) couples spacing and SIR resonator two (22), SIR resonator three with signal coupling line (24)
(23) identical as signal coupling line (24) coupling spacing.
10. the two-band reconfigurable filter according to claim 1 based on SIR load PIN diode structure, feature
It is, the signal coupling line (24) includes left signal coupling line (241) and right signal coupling line (242), left signal coupling line
(241) and right signal coupling line (242) is symmetrical about resonator one (21) middle line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433580.1A CN108832237B (en) | 2018-05-08 | 2018-05-08 | Dual-band reconfigurable filter based on SIR loading PIN diode structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433580.1A CN108832237B (en) | 2018-05-08 | 2018-05-08 | Dual-band reconfigurable filter based on SIR loading PIN diode structure |
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| Publication Number | Publication Date |
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| CN108832237A true CN108832237A (en) | 2018-11-16 |
| CN108832237B CN108832237B (en) | 2021-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110854487A (en) * | 2019-10-28 | 2020-02-28 | 深圳大学 | Dual-passband bandwidth-adjustable reconfigurable filter |
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| CN204375894U (en) * | 2015-01-15 | 2015-06-03 | 华南理工大学 | A kind of restructural double-frequency bandpass filtering device |
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| CN107403982A (en) * | 2017-08-15 | 2017-11-28 | 南通大学 | Broadband variable band-pass filter based on step impedance resonator and preparation method thereof |
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2018
- 2018-05-08 CN CN201810433580.1A patent/CN108832237B/en active Active
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| CN204375894U (en) * | 2015-01-15 | 2015-06-03 | 华南理工大学 | A kind of restructural double-frequency bandpass filtering device |
| CN106571507A (en) * | 2016-11-14 | 2017-04-19 | 南京理工大学 | Multifunctional reconfigurable filter based on principle of signal interference |
| CN107403982A (en) * | 2017-08-15 | 2017-11-28 | 南通大学 | Broadband variable band-pass filter based on step impedance resonator and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110854487A (en) * | 2019-10-28 | 2020-02-28 | 深圳大学 | Dual-passband bandwidth-adjustable reconfigurable filter |
| CN110854487B (en) * | 2019-10-28 | 2020-12-22 | 深圳大学 | Dual-passband bandwidth-adjustable reconfigurable filter |
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| CN108832237B (en) | 2021-06-29 |
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