CN113948840A - Reconfigurable microwave band-stop filter of miniaturized ultra-wide frequency tuning range - Google Patents
Reconfigurable microwave band-stop filter of miniaturized ultra-wide frequency tuning range Download PDFInfo
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- CN113948840A CN113948840A CN202111291889.XA CN202111291889A CN113948840A CN 113948840 A CN113948840 A CN 113948840A CN 202111291889 A CN202111291889 A CN 202111291889A CN 113948840 A CN113948840 A CN 113948840A
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- microstrip line
- stop
- microwave band
- tuning range
- reconfigurable microwave
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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
- H01P1/203—Strip line filters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
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Abstract
The invention discloses a miniature ultra-wideband frequency tuning range reconfigurable microwave band-stop filter, which comprises an input port, an output port, a microstrip line and at least two reconfigurable microwave band-stop resonators, wherein the reconfigurable microwave band-stop resonators are coupled with the microstrip line, and the microstrip line is used for connecting the input port and the output port. The reconfigurable microwave band-stop resonator comprises a coupling microstrip line segment, a terminal short-circuit microstrip line, a capacitor, a variable capacitance diode, a PIN diode, a first direct-current voltage bias circuit and a second direct-current voltage bias circuit. The ultra-wide frequency tuning range of the stop band is realized by using a PIN diode and a variable capacitance diode in combination. The reconfigurable microwave band-stop filter with the miniaturized ultra-wide frequency tuning range can be widely applied to the field of microwave devices.
Description
Technical Field
The invention relates to the field of microwave devices, in particular to a reconfigurable microwave band-stop filter with a miniaturized ultra-wide frequency tuning range.
Background
Electromagnetic interference effects play a crucial role in the degradation of the performance of electronic systems. Generally, electromagnetic interference signals are unknown and time-varying and need to be suppressed using a reconfigurable band-stop filter. Meanwhile, the frequency variation range of the electromagnetic interference signal is large. Therefore, a reconfigurable band-stop filter needs to have an ultra-wide frequency tuning range. At present, the existing reconfigurable microwave band-stop filter has the function of reconfigurable stop band, but has the problems of narrow tuning range of stop band frequency, large size and the like.
Disclosure of Invention
The invention aims to provide a miniature microwave band-stop filter with an ultra-wide frequency tuning range, which aims to solve the problems of narrow tuning range of stop band frequency, large size and the like in the prior art.
The first technical scheme adopted by the invention is as follows: a miniature ultra-wideband frequency tuning range reconfigurable microwave band-stop filter comprises an input port, an output port, a microstrip line and at least two reconfigurable microwave band-stop resonators:
the reconfigurable microwave band-stop resonator is coupled with the microstrip line;
the microstrip line is used for connecting the input port and the output port.
Further, the reconfigurable microwave band-stop resonator comprises a coupling microstrip line segment, a terminal short-circuit microstrip line, a capacitor, a varactor, a PIN diode, a first direct-current voltage bias circuit and a second direct-current voltage bias circuit:
the first end of the capacitor is connected with the coupling microstrip line segment, the second end of the capacitor is connected with the cathode of the PIN diode, the anode of the PIN diode is connected with a section of microstrip line with a short circuit at the terminal, the cathode of the variable capacitance diode is connected with the coupling microstrip line segment, the anode of the variable capacitance diode is grounded, the first direct-current voltage bias circuit is connected between the PIN diode and the capacitor, and the second direct-current voltage bias circuit is connected through the coupling microstrip line segment.
Further, the first direct current voltage bias circuit is used for providing discrete voltage values of the PIN diode under the on state and the off state; and the second direct-current voltage bias circuit is used for providing a continuous voltage value under the working voltage of the variable capacitance diode.
Furthermore, the number of the reconfigurable microwave band-stop resonators is even, and the reconfigurable microwave band-stop resonators are arranged at equal intervals along the microstrip line and are symmetrical about the central axis of the microstrip line.
Further, all the reconfigurable microwave band-stop resonators have the same structure and size.
Further, the microstrip line is a 50 Ω microstrip line.
The method and the system have the beneficial effects that: the frequency and the bandwidth of the reconfigurable microwave band-stop filter with the miniaturized ultra-wide frequency tuning range can be independently controlled, the reconfigurable microwave band-stop filter has the advantages of compact structure and small size, and the time-varying electromagnetic interference signals can be suppressed by combining the PIN diode and the varactor diode, so that the reconfigurable microwave band-stop filter has a wider frequency tuning range.
Drawings
FIG. 1 is a schematic diagram of the general structure of a miniaturized ultra-wideband frequency tuning range reconfigurable microwave band-stop filter according to the present invention;
fig. 2 is a simulation diagram of the upper stop band frequency tuning range according to an embodiment of the present invention.
Fig. 3 is a simulation diagram of the tuning range of the lower stop band frequency according to an embodiment of the invention.
Fig. 4 is a test chart of the upper stop band frequency tuning range according to the embodiment of the present invention.
Fig. 5 is a test chart of the tuning range of the lower stop band frequency according to the embodiment of the invention.
FIG. 6 is a diagram of a stopband bandwidth tuning test according to an embodiment of the present invention;
reference numerals: a1, microstrip line; a2, coupling microstrip line segment; a3, a terminal short-circuit microstrip line; C. a capacitor; d1, PIN diode; d2, varactor diodes; u1, a first direct current voltage bias circuit; u2, a second DC voltage bias circuit; k1, input port; k2, output port.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
Referring to fig. 1, the invention provides a miniature ultra-wideband frequency tuning range reconfigurable microwave band-stop filter, which comprises an input port K1, an output port K2, a microstrip line a1 and at least two reconfigurable microwave band-stop resonators:
the reconfigurable microwave band-stop resonator is coupled with a microstrip line A1;
the microstrip line a1 is used for connecting the input port K1 and the output port K2.
Specifically, a substrate of TaconicTLY-5 having a thickness of 0.508mm and a relative effective dielectric constant of 2.2 was used. The specific geometrical dimensions are as follows: l is1＝7mm，L2＝1mm，W0＝1.54mm，W1＝0.5mm，W21.2mm and g10.1 mm. The overall dimensions of the circuit of the embodiment are 49.5mm by 10.34 mm.
V1PIs to supply a DC voltage, V, to the first PIN diode1VThe first varactor is supplied with a dc voltage.
The rejection degree of the stop band is in direct proportion to the number of the reconfigurable microwave band-stop resonators, the number of the used reconfigurable microwave band-stop resonators is determined by the rejection degree of the stop band, and in the embodiment, the number N of the reconfigurable microwave band-stop resonators is equal to 12.
Further as a preferred embodiment of the method, the reconfigurable microwave band-stop resonator includes a coupling microstrip line segment a2, a terminal short-circuited microstrip line A3, a capacitor C, a varactor diode D2, a PIN diode D1, a first dc voltage bias circuit U1, and a second dc voltage bias circuit U2:
the first end of the capacitor C is connected with a coupling microstrip line section A2, the second end of the capacitor C is connected with the cathode of a PIN diode D1, the anode of the PIN diode D1 is connected with a terminal short-circuit microstrip line A3, the cathode of the varactor D2 is connected with a coupling microstrip line section A2, the anode of the varactor D2 is grounded, the first direct-current voltage bias circuit U1 is connected between the PIN diode D1 and the capacitor C, and the second direct-current voltage bias circuit U2 is connected through the coupling microstrip line section A2.
Specifically, the capacitance values of the capacitors are all 3pF, the PIN diode D1 is an SMP1320 model, the varactor diode D2 is an MA46H201 model, the first direct-current voltage bias circuit U1 is a direct-current voltage bias of the PIN diode D1, and the second direct-current voltage bias circuit U2 is a direct-current voltage bias of the varactor diode D2.
Further as a preferred embodiment of the method, the first direct current voltage bias circuit is used for providing discrete voltage values of the PIN diode under the two states of on and off; and the second direct-current voltage bias circuit is used for providing a continuous voltage value under the working voltage of the variable capacitance diode.
Further as a preferred embodiment of the method, the number of the reconfigurable microwave band-stop resonators is even, and the reconfigurable microwave band-stop resonators are arranged at equal intervals along the microstrip line a1 and are symmetrical with respect to the central axis of the microstrip line.
Further as a preferred embodiment of the method, the structures and the sizes of all the reconfigurable microwave band-stop resonators are the same.
As a further preferred embodiment of the method, the microstrip line a1 is a 50 Ω microstrip line.
The ultra-wide frequency tuning range of the miniature ultra-wide frequency tuning range reconfigurable microwave band-stop filter is realized by combining a PIN diode D1 and a varactor D2. When PIN diode D1 is in the off and on states, the upper and lower stop band frequency tuning ranges can be obtained, respectively. Therefore, the total stopband frequency tuning range, including the upper and lower stopband frequency tuning ranges, can be greatly improved. Meanwhile, the frequency and bandwidth of the stop band can be independently adjusted by the bias voltage of the varactor diode D2. The degree of rejection of the stop band is proportional to the number of the reconfigurable microwave band-stop resonators.
Fig. 2 shows a simulation diagram of the tuning range of the upper stop band frequency according to this embodiment, where the PIN diode is in an off state. As can be seen from the figure, the simulated upper stop band frequency tuning range is 3.61-6.34GHz (55%), and the stop band rejection is 25 dB. Fig. 3 shows a simulation diagram of the tuning range of the lower stop band frequency according to this embodiment, in which the PIN diode is in an on state. As can be seen from the figure, the simulated lower stop band frequency tuning range is 2.04-3.76GHz (59%), and the stop band rejection is 10 dB. The simulated lower stop band frequency tuning range with 20dB stop band rejection is 3.03-3.66GHz (19%).
Fig. 4 shows a test chart of the tuning range of the upper stop band frequency according to this embodiment, in which the PIN diode D1 is in an off state. As can be seen from the figure, the upper stop band frequency tuning range tested is 3.6-6.39GHz (56%), and the stop band rejection is 25 dB. Fig. 5 shows a test chart of the tuning range of the lower stop band frequency according to this embodiment, in which the PIN diode D1 is in an on state. As can be seen from the figure, the tuning range of the lower stop band frequency tested is 2.04-3.76GHz (59%), and the degree of stop band rejection is 10 dB. The lower stop band frequency tuning range tested with 20dB stop band rejection was 3.03-3.66GHz (19%). Thus, the total stopband frequency tuning range tested was 3.03-6.39GHz (71%), with a stopband rejection of 20 dB. The tested total stop band frequency tuning range with 10dB stop band rejection is 2.04-6.39GHz (103%), and an ultra-wide stop band frequency tuning range is realized.
In order to realize the control of the stop band bandwidth, 12 reconfigurable microwave band-stop resonators are divided into two groups. Wherein the first group comprises reconfigurable microwave band-stop resonators 1 to 6 and the second group comprises reconfigurable microwave band-stop resonators 7 to 12. And feeding the two groups of reconfigurable microwave band-stop resonators by using two groups of direct-current voltage biases respectively, thereby realizing the control of the stop band bandwidth. Fig. 6 shows a test chart of the stop band bandwidth tuning of the present embodiment. As can be seen from the figure, the tuning range of the stop band bandwidth with 10dB stop band rejection is 510-820MHz when the stop band frequency is 5.1 GHz.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a restructural microwave band elimination filter of miniaturized super wide band frequency tuning range which characterized in that, includes input port, output port, microstrip line and at least two restructural microwave band elimination resonators:
the reconfigurable microwave band-stop resonator is coupled with the microstrip line;
the microstrip line is used for connecting the input port and the output port.
2. The miniaturized ultra-wideband frequency tuning range reconfigurable microwave band-stop filter of claim 1, wherein the reconfigurable microwave band-stop resonator comprises a coupling microstrip line segment, a short-circuited termination microstrip line, a capacitor, a varactor, a PIN diode, a first DC voltage bias circuit and a second DC voltage bias circuit:
the first end of the capacitor is connected with the coupling microstrip line segment, the second end of the capacitor is connected with the cathode of the PIN diode, the anode of the PIN diode is connected with the terminal short circuit microstrip line, the cathode of the variable capacitance diode is connected with the coupling microstrip line segment, the anode of the variable capacitance diode is grounded, the first direct current voltage bias circuit is connected between the PIN diode and the capacitor, and the second direct current voltage bias circuit is connected through the coupling microstrip line segment.
3. A miniaturized ultra-wide band frequency tuning range reconfigurable microwave band reject filter according to claim 2, characterized in that:
the first direct-current voltage bias circuit is used for providing discrete voltage values of the PIN diode in an on state and an off state;
and the second direct-current voltage bias circuit is used for providing a continuous voltage value under the working voltage of the variable capacitance diode.
4. The miniaturized ultra-wideband frequency tuning range reconfigurable microwave band-stop filter as claimed in claim 3, wherein the number of the reconfigurable microwave band-stop resonators is even, and the reconfigurable microwave band-stop resonators are arranged at equal intervals along the microstrip line and are symmetrical with respect to the central axis of the microstrip line.
5. The miniaturized ultra-wide band frequency tuning range reconfigurable microwave band-stop filter of claim 4, wherein all of the reconfigurable microwave band-stop resonators have the same structure and size.
6. The miniaturized ultra-wideband frequency tuning range reconfigurable microwave band-stop filter of claim 5, wherein the microstrip line is a 50 Ω microstrip line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111291889.XA CN113948840A (en) | 2021-11-03 | 2021-11-03 | Reconfigurable microwave band-stop filter of miniaturized ultra-wide frequency tuning range |
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| CN202111291889.XA CN113948840A (en) | 2021-11-03 | 2021-11-03 | Reconfigurable microwave band-stop filter of miniaturized ultra-wide frequency tuning range |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034363A (en) * | 2019-04-04 | 2019-07-19 | 电子科技大学 | A kind of microwave electricity tune bandstop filter based on open-end microstrip line construction |
| CN110176659A (en) * | 2019-04-04 | 2019-08-27 | 南京航空航天大学 | The restructural bandpass filter of the bandwidth of binary system formula |
| CN110729538A (en) * | 2019-11-07 | 2020-01-24 | 电子科技大学 | Miniaturized ultra wide band-pass filter with reconfigurable trapped wave band |
| CN110911786A (en) * | 2019-11-28 | 2020-03-24 | 电子科技大学 | Reconfigurable high-rejection dual-band-stop filter |
-
2021
- 2021-11-03 CN CN202111291889.XA patent/CN113948840A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034363A (en) * | 2019-04-04 | 2019-07-19 | 电子科技大学 | A kind of microwave electricity tune bandstop filter based on open-end microstrip line construction |
| CN110176659A (en) * | 2019-04-04 | 2019-08-27 | 南京航空航天大学 | The restructural bandpass filter of the bandwidth of binary system formula |
| CN110729538A (en) * | 2019-11-07 | 2020-01-24 | 电子科技大学 | Miniaturized ultra wide band-pass filter with reconfigurable trapped wave band |
| CN110911786A (en) * | 2019-11-28 | 2020-03-24 | 电子科技大学 | Reconfigurable high-rejection dual-band-stop filter |
Non-Patent Citations (1)
| Title |
|---|
| ZABDIEL BRITO-BRITO等: "Microstrip switchable bandstop filter using PIN diodes with precise frequency and bandwidth control", 《2008 EUROPEAN CONFERENCE ON WIRELESS TECHNOLOGY》 * |
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