CN209389186U - A kind of single layer surface-mount type millimeter wave filter - Google Patents
A kind of single layer surface-mount type millimeter wave filter Download PDFInfo
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- CN209389186U CN209389186U CN201822095787.0U CN201822095787U CN209389186U CN 209389186 U CN209389186 U CN 209389186U CN 201822095787 U CN201822095787 U CN 201822095787U CN 209389186 U CN209389186 U CN 209389186U
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- Prior art keywords
- filter
- millimeter wave
- single layer
- mount type
- layer surface
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- 239000000463 material Substances 0.000 claims abstract description 4
- 238000006880 cross-coupling reaction Methods 0.000 claims abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052751 metal Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a kind of single layer surface-mount type millimeter wave filters, using planar microstrip circuit form, including metallized semi rectangular opening, minor matters, cross-coupled filter, Surface Mount pad, the cross-coupled filter is connected in port endface with metallized semi rectangular opening by micro-strip, and port match is realized by minor matters, metallized semi rectangular opening is connected with back side Surface Mount pad, forms vertical transition.The utility model has the advantages that 1) metallized semi-pore by circuit port is directly connected to the back side from front vertical, the method for carrying out impedance matching in conjunction with (more) minor matters at port, the Surface Mount mode filter for being suitble to millimeter wave frequency band is formed, good port match, superior performance are realized.2) low-loss material is selected, cross-coupling forms the planar microstrip structure filter of the high steepness of quasi-elliptic function, has good standing wave and insertion loss in passband.3) it is suitable for the filter of diversified forms.4) encapsulating package is eliminated, its influence to performance of filter, effectively save cost are eliminated.
Description
Technical field
The utility model is a kind of high-performance single layer surface-mount type millimeter wave filter, belongs to short-wave communication tedhnology field.
Background technique
Microwave filter is widely used in the systems such as electronics, communication, is one of critical component therein.Microstrip filter
Due to the circuit form of its planarization, it is easy to accomplish the miniaturization of system, and it is light-weight, be conducive to integrated, precision is high, stability
Good, high reliablity is widely used in all kinds of microwave modules, in system.The design of elliptic function microstrip filter, bimodulus, multimode filter
Wave device design the methods of, be capable of forming highly selective filtering characteristic, thus minimized, it is light-weighted simultaneously, acquisition
Preferable performance of filter can obtain the effect being equal with cavity body filter in certain occasions, obtain the favor of user.
In millimeter wave frequency band, planar microstrip structure filter is mostly used gold wire bonding and is interconnected with external circuit, assembly effect
Rate is relatively low, is not suitable for producing in enormous quantities, especially in civilian goods field, product quantity is huge, it is desirable that and assembly efficiency must be very high,
It is just able to satisfy requirement that is highly reliable, producing in enormous quantities, and Surface Mount is the current main path efficiently assembled on a large scale, therefore is ground
Studying carefully surface-mount type millimeter wave filter seems particularly necessary, it is made to obtain extensive and deep application in more occasions, strong to push
The progress of microwave, millimeter-wave systems.
Surface-mount type device often realized using encapsulating package, but in millimeter wave frequency band, since ghost effect is more serious,
Shell is difficult to excellent millimeter wave performance, and standing wave is bad and introduces biggish insertion loss, is also increased using shell
Device hard cost, the labour cost of device assembly, extends the lead time of device.
The core of surface-mount type device is by the design of the vertical transition of front-side circuit to back side Surface Mount pad, and the structure is often
It needs multilayer planar circuit to participate in, to increase design freedom, obtains good microwave, millimeter wave performance, but to single layer plane
Its design freedom is smaller for circuit, it is difficult to obtain the vertical transition with excellent performance, therefore although single layer planar circuit
It is succinct enough, but the vertical transition excellent by its forming properties, and formation Surface Mount structure is challenging in turn, especially in milli
Meter wave frequency band, since ghost effect is more serious, the matching of port is become increasingly difficult.
Summary of the invention
The utility model proposes a kind of high-performance single layer surface-mount type millimeter wave filters, and the purpose is to for existing flat
Face circuit higher operating costs, the defects of port match is difficult, propose a kind of high-performance single layer surface-mount type millimeter wave filter,
So that high-performance single layer plane microstrip filter is suitble to Surface Mount, and also there is good standing wave and insertion loss in free transmission range,
And Out-of-band rejection performance, so that the mode filter be made to be able to satisfy requirement that is highly reliable, producing in enormous quantities, the army of can be widely applied to
In the systems such as the communication of people's dual-purpose electronic, radar.
The technical solution of the utility model: a kind of single layer surface-mount type millimeter wave filter, using planar microstrip circuit
Form, including metallized semi rectangular opening 1, minor matters 2, cross-coupled filter 3, Surface Mount pad, the cross-coupled filter 3 are logical
It crosses micro-strip to be connected in port endface with metallized semi rectangular opening 1, and realizes port match, metallized semi rectangle by minor matters 2
Hole 1 is connected with back side Surface Mount pad, forms vertical transition.
The utility model has the beneficial effects that
1) on single layer planar circuit, by metallized semi-pore vertical transition, i.e. metallized semi-pore is straight by circuit port
It connects from front vertical and is connected to the back side, in conjunction with the method that (more) minor matters at port carry out impedance matching, formed and be suitble to millimeter wave
The Surface Mount mode filter of frequency range, realizes good port match, and superior performance is simple for structure practical.
2) low-loss material is selected, and uses cross-linked design method, forms quasi-elliptic function in millimeter wave frequency band
The planar microstrip structure filter of high steepness, and there is good standing wave and insertion loss in its passband.
3) the Surface Mount structure of the Surface Mount mode filter is suitable for the filter of diversified forms, including low pass, high pass and band
It is logical, suitable for multiple frequency ranges including millimeter wave frequency band.
4) the type Surface Mount structure eliminates encapsulating package, eliminates its influence to performance of filter, effectively save cost.
5) it is conducive to Planar integration, is able to satisfy the requirement of all kinds of microwaves, millimeter wave component.
Detailed description of the invention
Attached drawing 1 is semicircle pad single layer surface-mount type millimeter wave filter structural schematic diagram
Attached drawing 2 is rectangular pads single layer surface-mount type millimeter wave filter structural schematic diagram.
Attached drawing 3 is ladder-like matching minor matters structural schematic diagram.
1 is metallized semi rectangular opening in figure, and 2 be minor matters, and 3 be cross-coupled filter, and 4 be semicircle Surface Mount pad, and 5 are
Rectangle Surface Mount pad.
Specific embodiment
A kind of single layer surface-mount type millimeter wave filter, using planar microstrip circuit form, including metallized semi rectangular opening 1,
Minor matters 2, cross-coupled filter 3, Surface Mount pad, the cross-coupled filter 3 is by micro-strip in port endface and metal
Change half rectangular opening 1 to be connected, and realize port match by minor matters 2, metallized semi rectangular opening 1 is connected with back side Surface Mount pad, gold
Half rectangular opening of categoryization is directly connected to the back side from front vertical by circuit port, forms vertical transition.
The Surface Mount pad is semicircle Surface Mount pad 4 or rectangle Surface Mount pad 5.
The filter is using quartz, aluminium oxide, sapphire etc..
The minor matters can be ladder-like.
The matching at vertical transition port being connected with back side Surface Mount pin adds minor matters, and optimizes meter to its length and width
It calculates, ultimately forms the good surface-mount type millimeter wave filter of matching together with inner plane microstrip filter.Minor matters can be ladder-like,
With more preferable realization matching.
Entire filter, which uses, is suitble to the low-loss substrate material of millimeter wave frequency band (quartz etc.), obtains good device
Characteristic.
Filter 3 can be bandpass filter, be also possible to low pass, high-pass filter.The basic structure can extend to
All single layer microstrip microwaves, millimetric wave device.Including filter, coupler, power splitter etc..
The mode filter has good standing wave and insertion loss characteristic, and passband edges steepness is fine, compact-sized, property
Can be superior, it is suitble to Surface Mount, can be widely used for all kinds of microwave systems.
Bottom surface base pin is directly formed with top surface micro-strip interconnection position for input, export structure end face vertical plane, is subtracted as far as possible
Small transmission path and parasitic effects are conducive to realize matched well in millimeter wave frequency band.
Technical solutions of the utility model are further illustrated with reference to the accompanying drawing
As shown in Fig. 1, cross-coupled filter is connected in port endface with metallized semi rectangular opening 1 by micro-strip,
And minor matters 2 are matched by front and realize port match, metallized semi rectangular opening and back side semicircle pad 4, form entire Surface Mount
Mode filter.
As shown in Fig. 2, cross-coupled filter is connected in port endface with metallized semi rectangular opening 1 by micro-strip,
And port match is realized by minor matters 2, metallized semi rectangular opening is connected with back side rectangular pads 5, forms entire surface-mount type filtering
Device.
As shown in Fig. 3, the minor matters are ladder-like, with more preferable realization matching.
Claims (6)
1. a kind of single layer surface-mount type millimeter wave filter, it is characterised in that use planar microstrip circuit form, including metallized semi
Rectangular opening (1), minor matters (2), cross-coupled filter (3), Surface Mount pad, the cross-coupled filter (3) are existed by micro-strip
Port endface is connected with metallized semi rectangular opening (1), and realizes port match, metallized semi rectangular opening (1) by minor matters (2)
It is connected with back side Surface Mount pad, the back side is directly connected to from front vertical by circuit port and forms vertical transition.
2. a kind of single layer surface-mount type millimeter wave filter according to claim 1, it is characterised in that the Surface Mount pad is
Semicircle Surface Mount pad (4) or rectangle Surface Mount pad (5).
3. a kind of single layer surface-mount type millimeter wave filter according to claim 1, it is characterised in that the single layer surface-mount type
Millimeter wave filter uses quartz material.
4. a kind of single layer surface-mount type millimeter wave filter according to claim 1, it is characterised in that the single layer surface-mount type
Millimeter wave filter uses aluminium oxide.
5. a kind of single layer surface-mount type millimeter wave filter according to claim 1, it is characterised in that the cross-coupling filter
Wave device (3) is bandpass filter, low-pass filter or high-pass filter.
6. a kind of single layer surface-mount type millimeter wave filter according to claim 1, it is characterised in that the minor matters are ladder
Shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095787.0U CN209389186U (en) | 2018-12-13 | 2018-12-13 | A kind of single layer surface-mount type millimeter wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095787.0U CN209389186U (en) | 2018-12-13 | 2018-12-13 | A kind of single layer surface-mount type millimeter wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209389186U true CN209389186U (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822095787.0U Withdrawn - After Issue CN209389186U (en) | 2018-12-13 | 2018-12-13 | A kind of single layer surface-mount type millimeter wave filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742494A (en) * | 2018-12-13 | 2019-05-10 | 中国电子科技集团公司第五十五研究所 | A kind of single layer surface-mount type millimeter wave filter |
-
2018
- 2018-12-13 CN CN201822095787.0U patent/CN209389186U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742494A (en) * | 2018-12-13 | 2019-05-10 | 中国电子科技集团公司第五十五研究所 | A kind of single layer surface-mount type millimeter wave filter |
| CN109742494B (en) * | 2018-12-13 | 2024-04-05 | 中国电子科技集团公司第五十五研究所 | Single-layer surface-mounted millimeter wave filter |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190913 Effective date of abandoning: 20240405 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190913 Effective date of abandoning: 20240405 |