CN2798332Y - Integrated waveguide cavity filter with damaged bottom structure substrate - Google Patents
Integrated waveguide cavity filter with damaged bottom structure substrate Download PDFInfo
- Publication number
- CN2798332Y CN2798332Y CN 200520072417 CN200520072417U CN2798332Y CN 2798332 Y CN2798332 Y CN 2798332Y CN 200520072417 CN200520072417 CN 200520072417 CN 200520072417 U CN200520072417 U CN 200520072417U CN 2798332 Y CN2798332 Y CN 2798332Y
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- dielectric substrate
- integrated
- wave
- damaged
- substrate
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Abstract
The utility model discloses an integrated waveguide cavity filter with a damaged bottom structure substrate, which can improve the out-of-band and in-band characteristics. The utility model comprises a dielectric substrate of which both sides are respectively provided with a metal patch and a metal patch which is used as a metal floor; a dielectric substrate integrated cavity is arranged on the dielectric substrate; both ends of the metal patch are respectively provided with feeding points of which each is respectively connected with a feeding microstrip line; the metal patch which is used as a metal floor is provided with damaged grooves which are respectively arranged below the feeding microstrip lines; the dielectric substrate integrated cavity is formed by the encirclement of plated through holes which are arranged on the dielectric substrate. The utility model has the advantages of small size, low cost, high quality factor, low insertion loss and easy integration.
Description
Technical field
The utility model relates to a kind of filter, relates in particular to a kind of damaged ground structure substrate integrated wave-guide cavity wave filter.
Background technology
The microwave and millimeter wave filter is at a critical component of microwave millimeter Radio Frequency Subsystem, and particularly in the microwave and millimeter wave integrated circuit, radio-frequency front-end need be used low insertion loss, filter that selectivity is good.The filter that utilizes traditional manufacturing high quality factor microwave and millimeter wave wave filter technology (as traditional metal waveguide) to make has high quality factor value, low-loss advantage, but have simultaneously bulky, cost is high, be difficult to integrated shortcoming.
Summary of the invention
The utility model provides a kind of can improve that band is outer, the damaged ground structure substrate integrated wave-guide cavity wave filter of band internal characteristic, and it is little to have a volume, and cost is low, high quality factor, and low insertion loss is easy to integrated advantage.
The utility model adopts following technical scheme:
A kind of damaged ground structure substrate integrated wave-guide cavity wave filter, the dielectric substrate that comprises the two-sided metal patch that is respectively equipped with metal patch and uses as metal floor, on dielectric substrate, be provided with the integrated cavity of dielectric substrate, be respectively equipped with distributing point at the two ends of metal patch and on each distributing point, be connected with the feed microstrip line respectively, be provided with damaged groove on the metal patch of using as metal floor and should the breakage groove lay respectively at the feed microstrip line below, the integrated cavity of above-mentioned dielectric substrate surrounds and constitutes by being located at plated-through hole on the dielectric substrate.
Compared with prior art, the utlity model has following advantage:
The utility model has utilized substrate integration wave-guide to have high Q value, low-loss characteristics, with substrate integrated wave-guide cavity wave as base unit, and (Defected Ground Structure, DGS) technology have produced the cavity band-pass filter of function admirable to adopt damaged ground structure.The utility model utilization is at fluting on the metal skin plates and beat a series of metal throuth hole and realize on dielectric substrate, thereby helps integrated in the microwave and millimeter wave circuit design; Adopt direct lotus root to close mode, remove the lotus root in several metal throuth holes formation slit between the promptly adjacent substrate integrated wave-guide cavity wave and close mode; , can be connected with microstrip line, coaxial line etc. easily the substrate integrated wave-guide cavity wave feed with co-planar waveguide; The utility model etches the damaged groove (as: square groove) that level is coupled to the substrate integrated wave-guide cavity wave filter two ends on the metal floor below the feed microstrip line, i.e. (square) damaged ground structure improves the characteristics such as bandwidth, passband fluctuation, the outer inhibition of band of common substrate integrated wave-guide cavity wave filter.Concrete advantage is as follows:
1) its transmission parameter of the utility model has good squareness factor and selectivity, owing to adopt direct lotus root to close mode, can transmit high-power;
2) with microstrip line as input/output interface, can be easily and microstrip line, coaxial line connects;
3) in the design of microwave and millimeter wave circuit, be easy to integrated.Owing to this filter is realized on dielectric substrate fully, and utilize the dielectric constant of dielectric substrate can regulate this filter size size very easily, thereby realization preferably and other microwave and millimeter wave circuit is integrated;
4) has higher Q value, very low insertion loss.This is that so compare with microstrip circuit, its Q value is than higher because this structure has and the similar characteristic of rectangular metal waveguide, and loss ratio is lower.
5) cost is low.Dielectric substrate can adopt the various microwave-medium plates of type such as polytetrafluoroethylene pressing plate, polytetrafluoroethylene Ceramic Composite dielectric substrate, LTCC, and does not need the special process, so cost is low.
6) on the metal floor below the feed microstrip line, etch the damaged groove (as: square groove) that level is coupled to the substrate integrated wave-guide cavity wave filter two ends, i.e. (square) damaged ground structure improves the characteristics such as passband fluctuation, bandwidth, the outer inhibition of band of common substrate integrated wave-guide cavity wave filter.
Description of drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is a vertical view of the present utility model.
Fig. 3 is a upward view of the present utility model.
Fig. 4 is a plated-through hole structural representation of the present utility model.
Fig. 5 is emulation and the test result figure of the utility model embodiment.
Fig. 6 is that the utility model is at the simulation result comparison diagram that etches on the metal floor below the feed microstrip line and do not etch under grade damaged groove situation that is coupled to the substrate integrated wave-guide cavity wave filter two ends.
Embodiment
A kind of damaged ground structure substrate integrated wave-guide cavity wave filter, the dielectric substrate 1 that comprises the two-sided metal patch 3 that is respectively equipped with metal patch 2 and uses as metal floor, on dielectric substrate 1, be provided with the integrated cavity 4 of dielectric substrate, be respectively equipped with distributing point at the two ends of metal patch 2 and on each distributing point, be connected with feed microstrip line 7 respectively, 8, on the metal patch of using as metal floor 3, be provided with damaged groove 31,32 and should breakage groove 31,32 lay respectively at feed microstrip line 7,8 below, the integrated cavity 4 of above-mentioned dielectric substrate surrounds and constitutes by being located at plated-through hole 6 on the dielectric substrate 1, in the present embodiment, damaged groove 31,32 is square groove, on dielectric substrate 1, be provided with the integrated cavity 4 of dielectric substrate of 2 phase cascades at least, for example: can adopt 2,3,5 integrated cavity cascades of dielectric substrate, between the integrated cavity of adjacent dielectric substrate, be provided with coupling slit 5, distributing point 7,8 adopt the coplanar wave guide feedback structure, above-mentioned plated-through hole is to offer through hole on dielectric substrate, metallic sheath 61 is set on through-hole wall and metallic sheath and the metal patch that is overlying on the dielectric substrate bilateral are coupled together.
The utility model to dielectric constant be 3, the square damaged ground structure SIW cavity body filters in four chambeies (as Fig. 1-4) realized on the thick 1.5 millimeters microwave-medium substrate have carried out emulation and test, have obtained scattering parameter simulation result and test result shown in Figure 5.Its centre frequency is 5.88GHz, and relative bandwidth is 5.1%, and minimum insertion loss is less than 1.38dB.
Claims (4)
1, a kind of damaged ground structure substrate integrated wave-guide cavity wave filter, the dielectric substrate (1) that comprises the two-sided metal patch (3) that is respectively equipped with metal patch (2) and uses as metal floor, it is characterized in that on dielectric substrate (1), being provided with the integrated cavity of dielectric substrate (4), be respectively equipped with distributing point and on each distributing point, be connected with feed microstrip line (7 respectively at the two ends of metal patch (2), 8), on the metal patch of using as metal floor (3), be provided with damaged groove (31,32) and should breakage groove (31,32) lay respectively at feed microstrip line (7,8) below, the integrated cavity of above-mentioned dielectric substrate (4) surrounds formation by the plated-through hole (6) that is located on the dielectric substrate (1).
2, damaged ground structure substrate integrated wave-guide cavity wave filter according to claim 1 is characterized in that damaged groove (31,32) is a square groove.
3, damaged ground structure substrate integrated wave-guide cavity wave filter according to claim 1 and 2, it is characterized in that on dielectric substrate (1), being provided with at least the integrated cavity of dielectric substrate (4) of 2 phase cascades, between the integrated cavity of adjacent dielectric substrate, be provided with coupling slit (5).
4, damaged ground structure substrate integrated wave-guide cavity wave filter according to claim 1 is characterized in that distributing point (7,8) adopts the coplanar wave guide feedback structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072417 CN2798332Y (en) | 2005-06-08 | 2005-06-08 | Integrated waveguide cavity filter with damaged bottom structure substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072417 CN2798332Y (en) | 2005-06-08 | 2005-06-08 | Integrated waveguide cavity filter with damaged bottom structure substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2798332Y true CN2798332Y (en) | 2006-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200520072417 Expired - Lifetime CN2798332Y (en) | 2005-06-08 | 2005-06-08 | Integrated waveguide cavity filter with damaged bottom structure substrate |
Country Status (1)
| Country | Link |
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| CN (1) | CN2798332Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012079336A1 (en) * | 2010-12-13 | 2012-06-21 | 中兴通讯股份有限公司 | Microwave bandpass filter and method for designing microwave bandpass filter |
| CN104124499A (en) * | 2014-08-01 | 2014-10-29 | 南京理工大学 | LTCC (low temperature co-fired ceramic) based E-band high-suppression band-pass filter |
| CN104335414A (en) * | 2012-06-04 | 2015-02-04 | 日本电气株式会社 | Band-pass filter |
| CN106207324A (en) * | 2016-08-26 | 2016-12-07 | 南京理工大学 | A kind of broadband filter based on substrate integration wave-guide |
-
2005
- 2005-06-08 CN CN 200520072417 patent/CN2798332Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012079336A1 (en) * | 2010-12-13 | 2012-06-21 | 中兴通讯股份有限公司 | Microwave bandpass filter and method for designing microwave bandpass filter |
| CN104335414A (en) * | 2012-06-04 | 2015-02-04 | 日本电气株式会社 | Band-pass filter |
| US9793589B2 (en) | 2012-06-04 | 2017-10-17 | Nec Corporation | Band-pass filter comprised of a dielectric substrate having a pair of conductive layers connected by sidewall through holes and center through holes |
| CN104124499A (en) * | 2014-08-01 | 2014-10-29 | 南京理工大学 | LTCC (low temperature co-fired ceramic) based E-band high-suppression band-pass filter |
| CN106207324A (en) * | 2016-08-26 | 2016-12-07 | 南京理工大学 | A kind of broadband filter based on substrate integration wave-guide |
| CN106207324B (en) * | 2016-08-26 | 2019-04-16 | 南京理工大学 | A kind of broadband filter based on substrate integration wave-guide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150608 Granted publication date: 20060719 |