CN207282679U - A kind of compact-sized bimodule band-pass filter - Google Patents
A kind of compact-sized bimodule band-pass filter Download PDFInfo
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- CN207282679U CN207282679U CN201721412865.4U CN201721412865U CN207282679U CN 207282679 U CN207282679 U CN 207282679U CN 201721412865 U CN201721412865 U CN 201721412865U CN 207282679 U CN207282679 U CN 207282679U
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- toroidal cavity
- cavity resonator
- pass filter
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Abstract
The utility model discloses a kind of compact-sized bimodule band-pass filter, including medium substrate and the filter construction being generally aligned in the same plane positioned at medium substrate upper surface；Filter construction includes toroidal cavity resonator（1）, T-shaped incoming feeder（2）, T-shaped output feeder（3）, T-shaped loading（4~7）With perturbation piece（8）；T-shaped loading（4~7）Positioned at toroidal cavity resonator（1）It is interior, including parallel portion and with parallel portion vertical component connected vertically, each T-shaped loading（4~7）Parallel portion respectively with toroidal cavity resonator（1）One of side be arranged in parallel, each T-shaped loading（4~7）Vertical component respectively with toroidal cavity resonator（1）One of side point midway connection.The utility model can not only be realized bimodulus characteristic, also be had wider pass band width scope, can also effectively reduce working frequency in addition, realize the miniaturization of bimodule band-pass filter by the dual-mode resonator with T-shaped loading.
Description
Technical field
It the utility model is related to microwave device field, more particularly to a kind of compact-sized bimodule band-pass filter.
Background technology
With the development of wireless communication system, the requirement of higher is proposed to microwave filter, high-performance, miniaturization are not
The development trend come.In the Miniaturization Design of microwave filter, plane bimodule band-pass filter is with its high-performance, compact-sized
The features such as receive more concern.Dual-mode resonator has relatively broad application in bimodule band-pass filter design, often
A dual-mode resonator can all regard a double frequency tuning circuit as, i.e. a resonator can produce two resonant frequencies at the same time,
Therefore, for the wave filter of n ranks, when using dual-mode resonator when, the quantity of resonator than reducing half during single mode so that
The size of circuit can effectively be reduced.
The bimodule band-pass filter of the prior art has following defect and deficiency：（1）The size of wave filter is larger, not enough tightly
Gather；（2）Pass-band performance is bad；（3）Pass band width narrow range；（4）Band external characteristics is bad, and selectivity is not high；（5）Complicated,
High processing costs.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided a kind of compact-sized bimodulus bandpass filtering
Device.
The purpose of this utility model is achieved through the following technical solutions：A kind of compact-sized bimodulus bandpass filtering
Device, including medium substrate, the metal ground plate positioned at medium substrate lower surface and positioned at medium substrate upper surface positioned at same
The filter construction of plane；The filter construction includes toroidal cavity resonator, T-shaped incoming feeder, T-shaped output feeder, four T
Type loads and perturbation piece；
The T-shaped incoming feeder is identical with T-shaped output feeder structure, micro- including 50 Ω microstrip lines and with 50 Ω
Band line parallel minor matters connected vertically；The perturbation piece is located at the angle that the two of which side inside toroidal cavity resonator is formed,
The T-shaped incoming feeder and T-shaped output feeder are located at outside toroidal cavity resonator, respective parallel minor matters respectively with annular resonance
Two other side of device is arranged in parallel；
The T-shaped loading is located inside toroidal cavity resonator, including parallel portion and vertical with the parallel portion connects
The vertical component effect connect, the one of side of the parallel portion of each T-shaped loading respectively with toroidal cavity resonator is arranged in parallel, each T-shaped
Point midway of the vertical component of loading respectively with one of side of toroidal cavity resonator is connected.
Further, the perturbation piece is square perturbation piece.
Further, the relative dielectric constant of the medium substrate is 9.6, thickness 0.8mm.
Further, the electrical length of the parallel portion of each T-shaped loading is 0.14λ g ,λ g For the bimodule band-pass filter
Guide wavelength corresponding to centre frequency.
The beneficial effects of the utility model are：The utility model can not only be protected by the dual-mode resonator with T-shaped loading
Hold bimodulus characteristic, moreover it is possible to working frequency is effectively reduced, so as to effectively realize the miniaturization of bimodule band-pass filter.Meanwhile entirely
Logical in-band insertion loss is relatively low, and wider range of 3dB pass band widths, is having two transmission zeros with outer, be effectively ensured respectively
Good Out-of-band rejection characteristic, the wave filter have high selectivity.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the S parameter schematic diagram that simulation calculation obtains；
In figure, 1- toroidal cavity resonators, 2-T type incoming feeders, 3-T type output feeders, the loading of 4 ~ 7-T types, 8- perturbation pieces.
Embodiment
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of compact-sized bimodule band-pass filter, including medium substrate, positioned at medium substrate following table
The metal ground plate in face and the filter construction being generally aligned in the same plane positioned at medium substrate upper surface；The filter construction
Including toroidal cavity resonator 1, T-shaped incoming feeder 2, the T-shaped loading 4 ~ 7 of T-shaped output feeder 3, four and perturbation piece 8；
The T-shaped incoming feeder 2 is identical with T-shaped 3 structure of output feeder, including 50 Ω microstrip lines and with 50 Ω
Microstrip line parallel minor matters connected vertically；The perturbation piece 8 is located at the angle that the two of which side inside toroidal cavity resonator 1 is formed
Place, the T-shaped incoming feeder 2 and T-shaped output feeder 3 be located at outside toroidal cavity resonator 1, respective parallel minor matters respectively with ring
Two other side of shape resonator 1 is arranged in parallel；
The T-shaped loading 4 ~ 7 is located inside toroidal cavity resonator 1, hangs down including parallel portion and with the parallel portion
The direct-connected vertical component connect, the parallel portion of each T-shaped loading 4 ~ 7 is parallel with one of side of toroidal cavity resonator 1 respectively to be set
Put, each point midway of the vertical component of T-shaped loading 4 ~ 7 respectively with one of side of toroidal cavity resonator 1 is connected.
More preferably, in the present embodiment, the perturbation piece 8 is square perturbation piece.
More preferably, in the present embodiment, the relative dielectric constant of the medium substrate is 9.6, thickness 0.8mm.
More preferably, in the present embodiment, the electrical length of the parallel portion of each T-shaped loading 4 ~ 7 is 0.14λ g ,λ g To be described
Guide wavelength corresponding to bimodule band-pass filter centre frequency.
Wherein, T-shaped feeder line structure can realize the coupling between toroidal cavity resonator 1 well.And add by using T-shaped
4 ~ 7 toroidal cavity resonator 1 is carried, the working frequency of the bimodule band-pass filter can be effectively reduced, so as to effectively realize bimodulus band
The miniaturization of bandpass filter.
The model of above-mentioned bimodule band-pass filter is established inside simulation software ADS, and emulation meter is carried out to the structure
Calculate, obtained simulation result is as shown in Figure 2.As can be seen that the centre frequency of the bimodule band-pass filter is located at 1.87 from figure
At GHz（If not using T-shaped loading 4 ~ 7, the working frequency of the wave filter is at 2.15 GHz）, three dB bandwidth scope is 7.5%, tool
There is wider pass band width, respectively at 1.66 GHz and 2.21 GHz, two pass for the position of outer two transmission zeros of passband
The decay of defeated zero point is respectively -62dB and -58dB, and good Out-of-band rejection characteristic has been effectively ensured.It can be seen from the above that by T-shaped
Loading 4 ~ 7, can effectively reduce the working frequency of wave filter, so as to fulfill the Miniaturization Design of wave filter, the entirety of the wave filter
Size is 14.93mm × 14.93mm, and structure is closely.
The utility model is described by embodiment, but the utility model is not construed as limiting, with reference to this practicality
New description, other changes of the disclosed embodiments, is such as readily apparent that for the professional person of this area, such
Change should belong within the scope of the utility model claims restriction.
Claims (4)
1. a kind of compact-sized bimodule band-pass filter, including medium substrate, the metallic ground positioned at medium substrate lower surface
Plate and the filter construction being generally aligned in the same plane positioned at medium substrate upper surface；It is characterized in that：The filter construction
Including toroidal cavity resonator（1）, T-shaped incoming feeder（2）, T-shaped output feeder（3）, four T-shaped loadings（4~7）With perturbation piece（8）；
The T-shaped incoming feeder（2）With T-shaped output feeder（3）Structure is identical, including 50 Ω microstrip lines and with 50 Ω
Microstrip line parallel minor matters connected vertically；The perturbation piece（8）Positioned at toroidal cavity resonator（1）Internal two of which side is formed
Angle at, the T-shaped incoming feeder（2）With T-shaped output feeder（3）Positioned at toroidal cavity resonator（1）Outside, respective parallel branch
Section respectively with toroidal cavity resonator（1）Two other side be arranged in parallel；
The T-shaped loading（4~7）Positioned at toroidal cavity resonator（1）Inside, hangs down including parallel portion and with the parallel portion
The direct-connected vertical component connect, each T-shaped loading（4~7）Parallel portion respectively with toroidal cavity resonator（1）One of side put down
Row is set, each T-shaped loading（4~7）Vertical component respectively with toroidal cavity resonator（1）One of side point midway connect
Connect.
A kind of 2. compact-sized bimodule band-pass filter according to claim 1, it is characterised in that：The perturbation piece
（8）For square perturbation piece.
A kind of 3. compact-sized bimodule band-pass filter according to claim 1, it is characterised in that：The medium base
The relative dielectric constant of plate is 9.6, thickness 0.8mm.
A kind of 4. compact-sized bimodule band-pass filter according to claim 1, it is characterised in that：Each T-shaped loading
（4~7）Parallel portion electrical length be 0.14λ g ,λ g For the guided wave ripple corresponding to the bimodule band-pass filter centre frequency
It is long.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721412865.4U CN207282679U (en) | 2017-10-30 | 2017-10-30 | A kind of compact-sized bimodule band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721412865.4U CN207282679U (en) | 2017-10-30 | 2017-10-30 | A kind of compact-sized bimodule band-pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207282679U true CN207282679U (en) | 2018-04-27 |
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|---|---|---|---|
| CN201721412865.4U Expired - Fee Related CN207282679U (en) | 2017-10-30 | 2017-10-30 | A kind of compact-sized bimodule band-pass filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799857A (en) * | 2017-10-30 | 2018-03-13 | 成都大学 | A kind of compact-sized bimodule band-pass filter |
-
2017
- 2017-10-30 CN CN201721412865.4U patent/CN207282679U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799857A (en) * | 2017-10-30 | 2018-03-13 | 成都大学 | A kind of compact-sized bimodule band-pass filter |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20181030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |