CN201000914Y - Direct coupling triangle substrate integrated waveguide cavity filter - Google Patents
Direct coupling triangle substrate integrated waveguide cavity filter Download PDFInfo
- Publication number
- CN201000914Y CN201000914Y CNU2006201254449U CN200620125444U CN201000914Y CN 201000914 Y CN201000914 Y CN 201000914Y CN U2006201254449 U CNU2006201254449 U CN U2006201254449U CN 200620125444 U CN200620125444 U CN 200620125444U CN 201000914 Y CN201000914 Y CN 201000914Y
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- isosceles triangle
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Abstract
The utility model discloses an integrated wave-guide cavity wave filter with direct coupling triangle substrate, which comprises a isosceles triangle cavities, each isosceles triangle cavity is arranged in order to form a regular polygon, wherein the two random adjacent isosceles triangle cavities are respectively a beginning end cavity and a end cavity, and a input port and a output port are arranged on the beginning end cavity and the end cavity, a coupling window is arranged between the beginning end cavity and the adjacent cavity, a coupling window is arranged between the end cavity and the adjacent cavity, a coupling window is arranged between the adjacent cavities and the adjacent cavities is located between the beginning end cavity and the end cavity, the isosceles triangle cavities is formed by a plurality of metal through holes which is arranged on the medium substrate with metal foil on both sides and the metal through holes structure is arranged by the isosceles triangle cavity. The wave filter has a well characteristic outside a pass hand because of adopting six resonant cavities to do the filtering work, and the transmission parameter also has a well squareness factor and selectivity.
Description
Technical field
The utility model relates to a kind of filter, relates in particular to a kind of direct coupling triangle substrate integral waveguide cavity filter that can be used for the design of microwave and millimeter wave integrated circuit.
Background technology
The microwave and millimeter wave filter is 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 that a kind of volume is little, cost is low, high quality factor, and low insertion loss is easy to integrated direct coupling triangle substrate integral waveguide cavity filter.
The utility model adopts following technical scheme:
A kind of direct coupling triangle substrate integral waveguide cavity filter, comprise the isosceles triangle cavity, each isosceles triangle cavity sequence arrangement forms regular polygon, wherein any two adjacent isosceles triangle cavitys are respectively initiating terminal cavity and terminal cavity, on initiating terminal cavity and terminal cavity, be provided with input port and output port, between initiating terminal cavity and adjacent cavity thereof, be provided with coupling window, be provided with coupling window between cavity and the adjacent cavity thereof endways, be provided with coupling window and this adjacent cavity between the adjacent cavity between initiating terminal cavity and terminal cavity, plated-through hole on the two-sided dielectric substrate that is covered with metal forming constitutes above-mentioned isosceles triangle cavity and plated-through hole is arranged by isosceles triangle by being located at.
Compared with prior art, the utlity model has following advantage:
1) with isosceles triangle especially with equilateral triangle SIW cavity as elementary cell, and be that elementary cell can be formed multiple different structure, so such filter has flexile characteristics on layout arrangement with the equilateral triangle;
2) because this filter has adopted six resonant cavitys to carry out filtering work, have good characteristic beyond the passband therefore, its transmission parameter also has good squareness factor and selectivity;
3) adopt direct coupling system, can effectively suppress electromagnetic interference; Adopt the direct coupling system save several metal throuth holes and to form the coupling slit can effectively suppress electromagnetic interference between the adjacent SIW circular cavity; owing to saved little band syndeton of using always between the adjacent cavity in the traditional approach; this class formation can bring the extra radiation loss and the discontinuity of degrade performance usually, so this filter has characteristics such as the loss of insertion is low, antijamming capability is strong.In addition, adjust the size in coupling slit and the bandwidth that the feed microstrip line can also be adjusted band pass filter.
4) because in the design of common planar circuit, microstrip structure is used to the connection between the device.This filter with microstrip line as input/output interface, can be easily with planar circuit in other microstrip line, coaxial line connects, thereby is convenient to the integrated of whole system and design;
5) 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;
6) compare with attainable other shape SIW cavity, the SIW circular cavity has the highest Q value and 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 circular metal waveguide, and loss ratio is lower.
7) 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, because similarly the printed circuit board (PCB) production cost is very low, and extensive use is very general, therefore ample supply and prompt delivery and receipt period are short, considering does not need the special process again, the printed circuit board production technology of employing standard just may be produced the qualified final products of performance, therefore cost is low, for the device that needs large-scale production, especially have great importance.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is directly be coupled filtering emulation and test results of six triangle SIW cavitys.
Fig. 3 is the utility model plated-through hole structural representation.
Embodiment
A kind of direct coupling triangle substrate integral waveguide cavity filter, with reference to Fig. 1, comprise isosceles triangle cavity 1, each isosceles triangle cavity 1 sequence arrangement forms regular polygon, wherein any two adjacent isosceles triangle cavitys are respectively initiating terminal cavity and terminal cavity, on initiating terminal cavity and terminal cavity, be provided with input port 2 and output port 3, between initiating terminal cavity and adjacent cavity thereof, be provided with coupling window 4, be provided with coupling window between cavity and the adjacent cavity thereof endways, be provided with coupling window and this adjacent cavity between the adjacent cavity between initiating terminal cavity and terminal cavity, above-mentioned isosceles triangle cavity is by being located at the two-sided metal forming 6 that is covered with, plated-through hole on 7 the dielectric substrate 5 constitutes and plated-through hole is pressed the isosceles triangle arrangement.
With reference to Fig. 3, metal throuth hole comprises the through hole that is located on the two-sided dielectric substrate 5 that is covered with metal forming 6,7, is provided with metal lining 8 and metal lining 8 and metal forming 6,7 in through hole.
With reference to Fig. 2, the test performance of this filter and simulation result coincide finely, and the insertion loss of entire device is about 2.1dB, and scope is usually: 9.85GHz～11.35GHz.In Fig. 2, solid line is represented test result, and dotted line is represented simulation result.
Claims (1)
1, a kind of direct coupling triangle substrate integral waveguide cavity filter, it is characterized in that comprising isosceles triangle cavity (1), each isosceles triangle cavity (1) sequence arrangement forms regular polygon, wherein any two adjacent isosceles triangle cavitys are respectively initiating terminal cavity and terminal cavity, on initiating terminal cavity and terminal cavity, be provided with input port (2) and output port (3), between initiating terminal cavity and adjacent cavity thereof, be provided with coupling window (4), be provided with coupling window between cavity and the adjacent cavity thereof endways, be provided with coupling window and this adjacent cavity between the adjacent cavity between initiating terminal cavity and terminal cavity, above-mentioned isosceles triangle cavity is by being located at the two-sided metal forming (6 that is covered with, 7) plated-through hole on the dielectric substrate (5) constitutes and plated-through hole is pressed the isosceles triangle arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201254449U CN201000914Y (en) | 2006-11-24 | 2006-11-24 | Direct coupling triangle substrate integrated waveguide cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201254449U CN201000914Y (en) | 2006-11-24 | 2006-11-24 | Direct coupling triangle substrate integrated waveguide cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000914Y true CN201000914Y (en) | 2008-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201254449U Expired - Lifetime CN201000914Y (en) | 2006-11-24 | 2006-11-24 | Direct coupling triangle substrate integrated waveguide cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201000914Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463525A (en) * | 2020-04-20 | 2020-07-28 | 南京邮电大学 | Miniaturized third-order SD-HMSIW band-pass filter based on coplanar waveguide |
| CN111755789A (en) * | 2020-06-24 | 2020-10-09 | 电子科技大学 | Tunable filter feed network based on LTCC process |
-
2006
- 2006-11-24 CN CNU2006201254449U patent/CN201000914Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463525A (en) * | 2020-04-20 | 2020-07-28 | 南京邮电大学 | Miniaturized third-order SD-HMSIW band-pass filter based on coplanar waveguide |
| CN111755789A (en) * | 2020-06-24 | 2020-10-09 | 电子科技大学 | Tunable filter feed network based on LTCC process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |
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| EXPY | Termination of patent right or utility model |