CN201556686U - Millimeter-wave filter - Google Patents
Millimeter-wave filter Download PDFInfo
- Publication number
- CN201556686U CN201556686U CN200920187678XU CN200920187678U CN201556686U CN 201556686 U CN201556686 U CN 201556686U CN 200920187678X U CN200920187678X U CN 200920187678XU CN 200920187678 U CN200920187678 U CN 200920187678U CN 201556686 U CN201556686 U CN 201556686U
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- filter
- waveguide
- millimeter wave
- wave filter
- diaphragm
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Abstract
The utility model discloses a millimeter-wave filter which is characterized in that a membrane is arranged on an electric wall surface in the center of standard waveguide in the filter, the membrane is transferred to a standard flange disk through the standard waveguide, since the structure is adopted, the filter has the following advantages that firstly, the insertion loss is between 0.5 to 0.8dB in the waveguide range of the filter, the maximum value is only 0.8dB, secondly, the rectangular coefficient of the filter is excellent, and the ex-band restraining degree is bigger than 45dB on 1GHz part of the pass band.
Description
Relate to the field
The utility model relates to millimeter wave hybrid integrated circuit field, particularly a kind of millimeter wave filter.
Background technology
Millimeter wave filter all has a wide range of applications in systems such as millimetre-wave attenuator, satellite communication, radar, navigation, guidance, electronic countermeasures, test instrumentation, and the quality of its performance tends to directly influence the quality of whole millimeter-wave systems.The resonant circuit of the millimeter wave filter of planar structure is made of planar transmission lines such as microstrip line and co-planar waveguides, and is easily integrated with active device, but this class filter has the low and interior big shortcoming of Insertion Loss of band of squareness factor.The dielectric filter that grew up in recent years has the good advantage of squareness factor, but this class filter bandwidht is narrow, and Insertion Loss is big in the band.
Provide a kind of and have that the little millimeter wave filter of Insertion Loss is the prior art technical issues that need to address in the high and band of squareness factor.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of millimeter wave filter, to reach the purpose that improves the filter squareness factor and reduce Insertion Loss in the band.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of millimeter wave filter, it is characterized in that: described filter is the electric wall place of the diaphragm arrangement of metallic membrane connection in standard waveguide central authorities, be transformed into standard flange by standard waveguide, the input of filter and output ring flange are done convenience like this and are connected with external circuit by calculating size, improve standing wave simultaneously, realized good filter function.Described millimeter wave filter has the good and interior little advantage of Insertion Loss of band of squareness factor.
Described standard waveguide is for electric wall being two of symmetry axis separately absolute construction.
Described metallic membrane is about waveguide electricity wall and magnetic wall symmetry, location hole and screw have been beaten in the metallic membrane edge, space between the metallic membrane forms air chamber, thereby determines diaphragm structure by air chamber, forms some resonant cavitys with waveguide and realizes filter function.
Described filter wave guide wall is provided with six screws, and two ends are the waveguide mouth, thereby realizes the filter action of millimeter wave.
Described diaphragm is that screw inserts location hole and locatees in standard waveguide, and the axis of screw and diaphragm be on same plane, thus assurance diaphragm smooth in standard waveguide.
Described diaphragm is an oxygen-free copper, silver-plated material, thus guarantee the fixing of filter size and reduce Insertion Loss in the band.
The material of described standard waveguide is a duralumin.
A kind of millimeter wave filter, owing to adopt said structure, this filter has the following advantages: 1, this filter inserts loss between 0.5～0.8dB in free transmission range, and maximum only is 0.8dB; 2, the squareness factor of filter is good, and the outer inhibition degree of band is departing from passband 1GHz place greater than 45dB.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is parallel to the cross-sectional view of the central longitudinal of waveguide electricity wall to the plane of symmetry for a kind of millimeter wave filter of the utility model edge;
Fig. 2 is the structural representation of the diaphragm of a kind of millimeter wave filter of the utility model;
Fig. 3 is the structural representation of the output ring flange of a kind of millimeter wave filter of the utility model;
Fig. 4 is the structural representation of the ring flange at a kind of millimeter wave filter diaphragm of the utility model two ends;
In Fig. 1-4,1, metallic membrane; 2, screw; 3, air chamber; 4, diaphragm; 5, location hole; 6, waveguide mouth; 7, standard waveguide; 8, standard flange.
Embodiment
Shown in Fig. 1-4, a kind of millimeter wave filter, it is characterized in that: described filter is the electric wall place that diaphragm 4 is arranged on standard waveguide 7 central authorities, be transformed into standard flange 8 by standard waveguide 7, the input of filter and output ring flange are by calculating size, do convenience like this and be connected, improved standing wave simultaneously, realize good filter function with external circuit.Described millimeter wave filter has the good and interior little advantage of Insertion Loss of band of squareness factor.
Described standard waveguide 7 is for electric wall being two of symmetry axis separately absolute construction.
Described metallic membrane 1 is about waveguide electricity wall and magnetic wall symmetry, location hole 5 and screw 2 have been beaten in metallic membrane 1 edge, space between the metallic membrane 1 forms air chamber 3, thereby determines diaphragm structure by air chamber, forms some resonant cavitys with waveguide and realizes filter function.
Described filter wave guide wall is provided with six screws 2, and two ends are waveguide mouth 6, thereby realizes the filter action of millimeter wave.
Described diaphragm 4 is that screw 2 inserts location holes 5 and locate in standard waveguide 7, and the axis of screw and diaphragm 4 be on same plane, thus assurance diaphragm smooth in standard waveguide.
Described diaphragm 4 is an oxygen-free copper, silver-plated material, thus guarantee the fixing of filter size and reduce Insertion Loss in the band.
The material of described standard waveguide 7 is a duralumin.
Waveguide type filter is an important branch of millimeter wave filter.In recent years, along with the fast development of millimeter-wave technology, more and more higher requirement has been proposed the waveguide type filter that is operated in millimeter wave frequency band.E face metallic membrane waveguide filter is the widely used filter form of Ka wave band, and it is simple in structure, is easy to processing and installation, and can obtains good filtering characteristic, is commonly used to realize the millimeter wave band pass filter.
Adopt pattern matching method to make the original dimension of filter, adopt complex power conservation technology correction diaphragm end face electricity wall condition effect, determine filter size by software emulation optimizations such as u-WAVE, CST and HFSS, carry out adjusted size at technologic mismachining tolerance, finally determine the processing dimension of filter.Filter is made up of the ring flange 9 at the diaphragm 4 that is clipped in standard waveguide 7 central authorities, filter two ends and the standard flange 8 of input and output side.One section formation filter in the middle of the standard waveguide 7 plays the conversion effect near two segment standard waveguides 7 of input port and delivery outlet, is used for the switching of the standard flange 8 of the ring flange 9 at filter two ends and input and output side.The thickness of diaphragm 4 and bore size are very big to the performance of filter influence, add to want strict its machining accuracy of control man-hour.Be divided into the two halves of symmetry when that section of clamping diaphragm portion processed in the standard waveguide 7, fix by three screws during assembling, guarantee that diaphragm 4 is smooth.A high performance Ka wave band E face metallic membrane waveguide filter, logical in-band insertion loss is 0.5～0.8dB, band is outer to be suppressed up to 45dB.
Ka wave band millimeter wave filter is made up of diaphragm 4, standard waveguide 7 and standard flange 8 etc., and wherein the diaphragm 4 that performance of filter is had the greatest impact is made up of four parts such as the part that constitutes resonator in the metallic membrane, location hole 5, air chamber 3, screw 2.Metallic membrane 4 materials are oxygen-free copper, and the material of standard waveguide 7 is a duralumin, and the material of standard flange 8 is an oxygen-free copper.Want the machining accuracy of strict control metallic membrane 4 in the course of processing, guarantee that the thickness error that constitutes the part of resonator in the metallic membrane is controlled in the preset range, in addition the machining accuracy of air chamber 3 also be need guaranteed; The diaphragm 4 and the standard waveguide 7 that process are silver-plated, can reduce the insertion loss of filter like this; Diaphragm 4 is placed on the electric wall place of standard waveguide 7 central authorities, set screw is inserted location hole 5, laying of set screw must guarantee that diaphragm 4 is smooth, aims at the back tighten the screws; Screw 2 is bigger than location hole 5 diameters, plays the role of fastening respectively and the installing and locating effect; At last, be connected with the standard waveguide 7 that ring flange 9 transition that are used for standard flange 8 and filter two ends are used at the two ends of filter.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection range of the present utility model.
Claims (7)
1. millimeter wave filter is characterized in that: described filter is the electric wall place that diaphragm (4) that metallic membrane (1) connects is arranged on standard waveguide (7) central authorities, is transformed into standard flange (8) by standard waveguide (7).
2. a kind of millimeter wave filter according to claim 1 is characterized in that: described standard waveguide (7) is for electric wall being two of symmetry axis separately absolute construction.
3. a kind of millimeter wave filter according to claim 1, it is characterized in that: described metallic membrane (1) is about waveguide electricity wall and magnetic wall symmetry, location hole (5) and screw (2) have been beaten in metallic membrane (1) edge, and the space between the metallic membrane (1) forms air chamber (3).
4. a kind of millimeter wave filter according to claim 1 is characterized in that: described filter wave guide wall is provided with six screws (2), and two ends are waveguide mouth (6).
5. a kind of millimeter wave filter according to claim 1 is characterized in that: described diaphragm (4) is gone up the location for screw (2) inserts location hole (5) in standard waveguide (7), and the axis of screw and diaphragm (4) are on same plane.
6. a kind of millimeter wave filter according to claim 1 is characterized in that: described diaphragm (4) is an oxygen-free copper, silver-plated material.
7. a kind of millimeter wave filter according to claim 1 is characterized in that: the material of described standard waveguide (7) is a duralumin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920187678XU CN201556686U (en) | 2009-09-21 | 2009-09-21 | Millimeter-wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920187678XU CN201556686U (en) | 2009-09-21 | 2009-09-21 | Millimeter-wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201556686U true CN201556686U (en) | 2010-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920187678XU Expired - Fee Related CN201556686U (en) | 2009-09-21 | 2009-09-21 | Millimeter-wave filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201556686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183894A (en) * | 2014-08-29 | 2014-12-03 | 中国人民解放军63655部队 | Cut-off microwave power attenuator |
-
2009
- 2009-09-21 CN CN200920187678XU patent/CN201556686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183894A (en) * | 2014-08-29 | 2014-12-03 | 中国人民解放军63655部队 | Cut-off microwave power attenuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20150921 |
|
| EXPY | Termination of patent right or utility model |