CN218867361U - Filter and filtering switch based on coupling metal wire - Google Patents
Filter and filtering switch based on coupling metal wire Download PDFInfo
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- CN218867361U CN218867361U CN202223221194.7U CN202223221194U CN218867361U CN 218867361 U CN218867361 U CN 218867361U CN 202223221194 U CN202223221194 U CN 202223221194U CN 218867361 U CN218867361 U CN 218867361U
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- 239000002184 metal Substances 0.000 title claims abstract description 177
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 177
- 230000008878 coupling Effects 0.000 title claims abstract description 50
- 238000010168 coupling process Methods 0.000 title claims abstract description 50
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 50
- 238000001914 filtration Methods 0.000 title abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 4
- 230000001629 suppression Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model aims at providing a wave filter and filtering switch based on coupling metal wire, this wave filter based on coupling metal wire is including locating metal wire I1, metal wire II 2, metal wire III 3, metal wire IV 4, metal wire V5 on the dielectric substrate,A metal lead VI 6 and a metal lead VII 7; these metal wires constitute a first coupling microstrip line TL 1 A second coupling microstrip line TL 2 A third coupling microstrip line TL 3 A fourth coupling microstrip line TL 4 (ii) a The left end of the metal lead II 2 is connected with the upper end of the metal lead V5 and then connected with a terminal 1 port, and the right end of the metal lead III 3 is connected with the upper end of the metal lead VI 6 and then connected with a terminal 2 port; the lower ends of the metal wire IV 4 and the metal wire VII 7 are grounded. The filter switch circuit formed by the integrated on-off control module has the advantages of compact structure size, high integration degree, good passband selectivity and low insertion loss in a filter state, and good turn-off suppression function in a turn-off state at a corresponding working frequency.
Description
Technical Field
The utility model relates to a radio frequency circuit front end communication device technical field, concretely relates to wave filter and filtering switch based on coupling metal wire.
Background
In a radio frequency system, a switch is one of key components such as time division multiplexing, a switch beam forming array and multiple input and output, and the like, and is widely applied to the front-end field of a radio frequency circuit system. The device structure at the front end of the rf system is usually composed of filters and switches that are separately designed and then cascaded, which undoubtedly increases the manufacturing cost and complexity of the front end circuit structure of the rf system.
Secondly, with the development of current communication technology, it has become a trend that communication devices are gradually adapted to operate in the 5G frequency band due to the arrival of the 5G era. However, the conventional design has narrow operating band, insufficient out-of-band rejection, impedance mismatch, etc. when operating in the 5G band. This is because the front end of the conventional rf circuit is usually designed with a filter and a switch device separately, and when the rf circuit is cascaded, the circuit system structure will be enlarged, the matching distortion will be increased, the loss will be increased, and the economic cost of the design will also be increased.
Disclosure of Invention
The utility model aims at providing a wave filter and filtering switch based on coupling metal conductor, first coupling microstrip line TL in this wave filter 1 A second coupling microstrip line TL 2 The third coupling microstrip line TL 3 And a fourth coupling microstrip line TL 4 Can generate symmetrical transmission zero point, and can be used as filter function of filter switchThe passband selectivity is increased, the out-of-band rejection is reduced, and the two are combined to obtain a better filtering effect. The filter switch based on filter integration has the advantages of compact circuit structure size, high integration degree, good passband selectivity and low Insertion Loss (IL) in a filter state, and good turn-off suppression function in a turn-off state at a corresponding working frequency.
The utility model discloses a filter based on coupling metal wire, which comprises a metal wire I1, a metal wire II 2, a metal wire III 3, a metal wire IV 4, a metal wire V5, a metal wire VI 6 and a metal wire VII 7 which are arranged on a medium substrate;
the left side of the metal wire I1 is coupled with the metal wire II 2 to form a first coupling microstrip line TL 1 (ii) a The right side of the metal wire I1 is coupled with a metal wire III 3 to form a second coupling microstrip line TL 2 (ii) a The right end of the metal wire II 2 is disconnected with the left end of the metal wire III 3, the left end of the metal wire I1 is flush with the left end of the metal wire II 2, and the right end of the metal wire I1 is flush with the right end of the metal wire III 3;
the metal wire IV 4 and the metal wire V5 are coupled to form a third coupling microstrip line TL 3 Third coupling microstrip line TL 3 Perpendicular to the first coupling microstrip line TL 1 ；
The metal lead VI 6 is coupled with the metal lead VII 7 to form a fourth coupling microstrip line TL 4 Fourth coupling microstrip line TL 4 With third coupling microstrip lines TL 3 Parallel;
the left end of the metal lead II 2 is connected with the upper end of the metal lead V5 and then connected with a terminal 1, and the right end of the metal lead III 3 is connected with the upper end of the metal lead VI 6 and then connected with a terminal 2;
the lower ends of the metal wire IV 4 and the metal wire VII 7 are grounded.
The widths of the metal wire I1, the metal wire II 2, the metal wire III 3, the metal wire IV 4, the metal wire V5, the metal wire VI 6 and the metal wire VII 7 are consistent.
The metal wire I1, the metal wire II 2, the metal wire III 3, the metal wire IV 4, the metal wire V5, the metal wire VI 6 and the metal wire VII 7 are all copper wires.
The Term1 port and the Term2 port are made of high-conductivity materials, and the characteristic impedance is 50 omega.
The Term1 port and the Term2 port are made of copper sheets.
Preferably, the dielectric substrate has the model number of RT _ Duroid5880 and the thickness of 0.8mm.
The utility model also discloses a filtering switch based on coupling wire, including foretell wave filter based on coupling wire, still include on-off control module, the left end and the on-off control module electricity of wire I1 be connected.
The on-off control module comprises a PIN diode and a capacitor C b A choke resistor R; the capacitor C b The negative electrode of the capacitor C is grounded b The positive pole of the positive pole is connected with one end of a choke resistor R and then connected with the positive pole of a PIN diode, and the negative pole of the PIN diode is connected with the left end of a metal lead I1; the other end of the choke resistor R is connected with a power supply V dc And (4) connecting.
The utility model discloses a theory of operation as follows: at a wide operating bandwidth, the first coupling microstrip line TL 1 A second coupling microstrip line TL 2 The Insertion Loss (IL) and Return Loss (RL) can be reduced by forming a parallel coupling feed line, and the third coupling microstrip line TL 3 And a fourth coupling microstrip line TL 4 The stub loaded resonator of the coupling microstrip line can generate symmetrical controllable transmission zero points. And finally, the on-off state of the filtering switch is changed by controlling the on-off of the external PIN diode, so that the filtering switch has high frequency selectivity, wide stop band and relatively low Insertion Loss (IL) when in a filter state, and has a good off inhibiting function when in an off state.
The utility model provides a filter had both guaranteed the reduction of Insertion Loss (IL) under the filter effect, can produce the selectivity under the transmission zero point of symmetry again through the device during operation and ensure the filtering state, can obtain good filtering effect.
The utility model provides a filter switch, the circuit structure size is compact, the integrated level is high, it is good that it passes band selectivity, insertion Loss (IL) are low under the filter state; the turn-off suppression function under the corresponding working frequency is good in the turn-off state; the circuit system integration can be improved, the problems of impedance matching distortion and the like can be reduced, and the circuit system has a good application prospect in the market of 5G frequency band work.
Drawings
Fig. 1 is a schematic structural diagram of a filter and a filter switch based on coupled metal wires provided in embodiments 1 and 2;
fig. 2 is an equivalent circuit diagram of a PIN diode filter switch provided in embodiment 3 in different states;
FIG. 3 is a data diagram of simulation and actual measurement of an example filter switch provided in example 3 in a filtering state;
fig. 4 is a data diagram of simulation and actual measurement of the filter switch in the off state according to the present embodiment;
the numbers and names in the figure are as follows:
1-metal wire I, 2-metal wire II, 3-metal wire III, 4-metal wire IV, 5-metal wire V, 6-metal wire VI, 7-metal wire VII.
Detailed description of the preferred embodiments
Examples
The present invention will be described in detail with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1, the filter based on coupled metal wires comprises a metal wire i 1, a metal wire ii 2, a metal wire iii 3, a metal wire iv 4, a metal wire v 5, a metal wire vi 6, and a metal wire vii 7, which are arranged on a substrate made of a Rogers _ RT _ Duroid5880 dielectric substrate;
the left side of the metal lead I1 is coupled with the metal lead II 2 to form a first coupling microstrip line TL 1 (ii) a The right side of the metal wire I1 is coupled with a metal wire III 3 to form a second coupling microstrip line TL 2 (ii) a The right end of the metal wire II 2 is disconnected with the left end of the metal wire III 3, and the metal wire IThe left end of the metal wire I1 is flush with the left end of the metal wire II 2, and the right end of the metal wire I1 is flush with the right end of the metal wire III 3; the metal wire IV 4 and the metal wire V5 are coupled to form a third coupling microstrip line TL 3 Third coupling microstrip line TL 3 Perpendicular to the first coupling microstrip line TL 1 (ii) a The metal lead VI 6 is coupled with the metal lead VII 7 to form a fourth coupling microstrip line TL 4 Fourth coupling microstrip line TL 4 With third coupling microstrip lines TL 3 Parallel connection; the left end of the metal lead II 2 is connected with the upper end of the metal lead V5 and then connected with a terminal 1, and the right end of the metal lead III 3 is connected with the upper end of the metal lead VI 6 and then connected with a terminal 2; the Term1 port and the Term2 port are made of copper sheets, and the characteristic impedance is 50 omega; the lower ends of the metal wire IV 4 and the metal wire VII 7 are grounded. The widths of the metal wire I1, the metal wire II 2, the metal wire III 3, the metal wire IV 4, the metal wire V5, the metal wire VI 6 and the metal wire VII 7 are consistent. The metal wire I1, the metal wire II 2, the metal wire III 3, the metal wire IV 4, the metal wire V5, the metal wire VI 6 and the metal wire VII 7 are all copper wires.
Examples
As shown in fig. 1, the filter switch based on the coupling metal wire is integrated with an on-off control module on the basis of the filter based on the coupling metal wire in embodiment 1;
the on-off control module comprises a PIN diode and a capacitor C b A choke resistor R; the capacitor C b The negative electrode of the capacitor C is grounded b The anode of the metal wire I1 is connected with one end of a choke resistor R and then connected with the anode of a PIN diode, and the cathode of the PIN diode is connected with the left end of the metal wire I1; the other end of the choke resistor R is connected with a power supply V dc And (4) connecting.
Examples
Specification of concrete composition and simulation experiment
The filter in embodiment 2 specifically consists of: the dielectric substrate is Rogers _ RT _ Duroid5880, the thickness of the dielectric substrate is 0.8mm, and the terminal is matched with a microstrip copper wire with characteristic impedance of 50 omega to form Term1 and Term2 ports. The PCB is manufactured into a metal lead I1, a metal lead II 2, a metal lead III 3, a metal lead IV 4, a metal lead V5, a metal lead VI 6 and a metal lead VII 7 by adopting 35um copper-clad wiring.
FIG. 2 is an equivalent circuit diagram of a PIN diode filter switch in different states, as shown in FIG. 2, when the diode is in conduction bias, the filter switch is in a filter state, and the diode can be equivalent to C s Capacitor series L of =0.15pF s Inductance of =0.7 nH. When the diode is in turn-off bias, the filter switch is in turn-off state, and the diode can be equivalent to L s Inductance series connection R of =0.7nH s =2Ω。
FIG. 3 is a simulation data diagram of the filter switch of the present embodiment in the filtering state, as shown in FIG. 3, the center frequency f in the filtering state 0 =0.8GHz, | S within the pass band 11 |>15dB，|S 21 |<0.5dB, relative bandwidth of 37.544.5%, with respect to center frequency f 0 The symmetric transmission zero achieves 20db out-of-band rejection, and it can be seen that the selection performance is better than other devices operating in the 5G frequency band.
FIG. 4 is a simulation data diagram of the filter switch of this embodiment in the off state, as shown in FIG. 4, within the working frequency band | S in the off state
11
|<0.5dB，|S
21
And the I is more than 25dB, and the turn-off inhibiting function is good.
Claims (8)
1. A filter based on a coupling metal wire comprises a metal wire I (1), a metal wire II (2), a metal wire III (3), a metal wire IV (4), a metal wire V (5), a metal wire VI (6) and a metal wire VII (7) which are arranged on a dielectric substrate; the method is characterized in that:
the left side of the metal wire I (1) is coupled with the metal wire II (2) to form a first coupling microstrip line TL 1 (ii) a The right side of the metal wire I (1) is coupled with the metal wire III (3)Then form the second coupling microstrip line TL 2 (ii) a The right end of the metal wire II (2) is disconnected with the left end of the metal wire III (3), the left end of the metal wire I (1) is flush with the left end of the metal wire II (2), and the right end of the metal wire I (1) is flush with the right end of the metal wire III (3);
the metal wire IV (4) and the metal wire V (5) are coupled to form a third coupling microstrip line TL 3 Third coupling microstrip line TL 3 Perpendicular to the first coupling microstrip line TL 1 ；
The metal lead VI (6) is coupled with the metal lead VII (7) to form a fourth coupling microstrip line TL 4 Fourth coupling microstrip line TL 4 With third coupling microstrip lines TL 3 Parallel;
the left end of the metal lead II (2) is connected with the upper end of the metal lead V (5) and then connected with a terminal 1, and the right end of the metal lead III (3) is connected with the upper end of the metal lead VI (6) and then connected with a terminal 2;
the lower ends of the metal lead IV (4) and the metal lead VII (7) are grounded.
2. The coupled metal conductor-based filter of claim 1, wherein: the widths of the metal wire I (1), the metal wire II (2), the metal wire III (3), the metal wire IV (4), the metal wire V (5), the metal wire VI (6) and the metal wire VII (7) are consistent.
3. The coupled metal conductor-based filter of claim 1, wherein: the metal wire I (1), the metal wire II (2), the metal wire III (3), the metal wire IV (4), the metal wire V (5), the metal wire VI (6) and the metal wire VII (7) are all copper wires.
4. The coupled metal conductor-based filter of claim 1, wherein: the Term1 port and the Term2 port are made of high-conductivity materials, and the characteristic impedance is 50 omega.
5. The coupled metal conductor-based filter of claim 1, wherein: the Term1 port and the Term2 port are made of copper sheets.
6. The coupled metal conductor-based filter of claim 1, wherein: the model of the dielectric substrate is RT _ Duroid5880, and the thickness is 0.8mm.
7. A coupled metal conductor based filter switch comprising a coupled metal conductor based filter according to any of claims 1-6, wherein:
the left end of the metal wire I (1) is electrically connected with the on-off control module.
8. The coupled metal conductor-based filter switch of claim 7, wherein: the on-off control module comprises a PIN diode and a capacitor C b A choke resistor R; the capacitor C b The negative electrode of (C) is grounded, and a capacitor C b The positive pole of the positive pole is connected with one end of a choke resistor R and then connected with the positive pole of a PIN diode, and the negative pole of the PIN diode is connected with the left end of a metal lead I (1); the other end of the choke resistor R is connected with a power supply V dc And (4) connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223221194.7U CN218867361U (en) | 2022-12-02 | 2022-12-02 | Filter and filtering switch based on coupling metal wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223221194.7U CN218867361U (en) | 2022-12-02 | 2022-12-02 | Filter and filtering switch based on coupling metal wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218867361U true CN218867361U (en) | 2023-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223221194.7U Active CN218867361U (en) | 2022-12-02 | 2022-12-02 | Filter and filtering switch based on coupling metal wire |
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| Country | Link |
|---|---|
| CN (1) | CN218867361U (en) |
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2022
- 2022-12-02 CN CN202223221194.7U patent/CN218867361U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240602 Address after: 121001 No. 45-1 Lanxi Valley, No.1 Bohai Avenue, Taihe District, Jinzhou City, Liaoning Province Patentee after: Li Bin Country or region after: China Address before: 545006 268 East Ring Road, Liuzhou, the Guangxi Zhuang Autonomous Region Patentee before: GUANGXI University OF SCIENCE AND TECHNOLOGY Country or region before: China |