CN108847516A - A kind of evaporative pattern waveguide high-pass filter - Google Patents
A kind of evaporative pattern waveguide high-pass filter Download PDFInfo
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- CN108847516A CN108847516A CN201810866247.XA CN201810866247A CN108847516A CN 108847516 A CN108847516 A CN 108847516A CN 201810866247 A CN201810866247 A CN 201810866247A CN 108847516 A CN108847516 A CN 108847516A
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- waveguide
- evaporative pattern
- pass filter
- resonant cavity
- pattern waveguide
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- 238000003780 insertion Methods 0.000 abstract description 5
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- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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Abstract
The invention discloses a kind of evaporative pattern waveguide high-pass filters.Two coupled waveguides as input/output port that evaporative pattern waveguide high-pass filter of the invention includes evaporative pattern waveguide and connect respectively with evaporative pattern waveguide both ends；One is connected at least one coupled waveguide for providing the resonant cavity of out-of-band transmission zero point, the resonance frequency of the resonant cavity is in the stopband range of the evaporative pattern waveguide high-pass filter.Compared with prior art, the present invention is by being arranged simple cavity resonator structure on the input port and/or output port of evaporative pattern waveguide high-pass filter, in the case where not increasing waveguide length, meeting compact-sized requirement, the transmission zero of the high-pass filter is realized with the zero point effect of the resonant cavity, increase Out-of-band rejection, while also reducing the Insertion Loss of the high-pass filter.In addition, technical solution of the present invention has the advantages of simple structure and easy realization, have a good application prospect.
Description
Technical field
The present invention relates to a kind of waveguide filter more particularly to a kind of evaporative pattern waveguide high-pass filters.
Background technique
High-pass filter is that a kind of frequency response is low cut, the high-end filter by form, is widely applied to
In various communications or radar system.In the higher microwave of frequency or millimeter wave frequency band, the high-pass filter quilt of waveguide form
The electronic system front end for widely applying to low local oscillator, for filtering out the reradiation of local oscillation signal and to image frequency signal
Inhibit.
Common waveguide high-pass filter mainly includes broadband band-pass filter and evaporative pattern high-pass filter both shapes
Formula.If the waveguide bandpass filter of ultra wide band, without zero point, Out-of-band rejection is not good enough；If designed using band zero point,
It is easy in broadband band-pass filter band because higher mode generates resonance, the performance of meeting severe exacerbation system at resonance.In addition
Waveguide broad-band bandpass filter is more demanding to processing dimension, thus cost is also relatively high.Evaporative pattern waveguide high-pass filter
Using one section of lesser rectangular waveguide of broadside（Evaporative pattern waveguide）, the broadside length of rectangular waveguide, which is less than, needs to inhibit frequency wavelength
1/2, the cutoff frequency of rectangular waveguide is higher than the frequency of being inhibited, and realizes the function of high-pass filter.The high-pass filtering of the form
Device is easier to process, and Insertion Loss very little due to not having window partition wall.But the high-pass filter of this kind of form is outer without band
The order of transmission zero, filter is determined that increasing Out-of-band rejection can only realize by waveguide length is increased, no by the length of waveguide
Conducive to the miniaturization of high-pass filter.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a kind of disappearing with transmission zero
Mould waveguide high-pass filter is lost, Out-of-band rejection can be increased by transmission zero in the case where not increasing waveguide length.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem：
A kind of evaporative pattern waveguide high-pass filter, two connect including evaporative pattern waveguide and respectively with evaporative pattern waveguide both ends
Coupled waveguide as input/output port；One is connected at least one coupled waveguide for providing out-of-band transmission zero point
Resonant cavity, the resonance frequency of the resonant cavity is in the stopband range of the evaporative pattern waveguide high-pass filter.
Preferably, the resonant cavity, and the resonance of two resonant cavities are connected separately on described two coupled waveguides
Frequency is different.So as to increase multiple transmission zeros for filter.
Preferably, the resonant cavity is connected to the side of its connected coupled waveguide, and relative to its connected coupled wave
The signal transmission direction led is vertically arranged.Alternatively, the resonant cavity is connected to its connected coupled waveguide and evaporative pattern waveguide phase
On end face even, and the signal transmission direction relative to its connected coupled waveguide is arranged in parallel.
For the ease of adjusting transmission zero location, further, it is provided on the resonant cavity for adjusting its resonance frequency
The tuning part of rate.
Preferably, the tuning part is the tuning screw that can be inserted into the resonant cavity.
It is further preferred that the tuning screw is set to the center of the resonant cavity.
Preferably, the evaporative pattern waveguide high-pass filter is integral forming technique manufacture.
Preferably, it is connected between the evaporative pattern waveguide and coupled waveguide by step-like mating structure.
Preferably, the evaporative pattern waveguide high-pass filter further includes waveguide turning structure.
Compared with prior art, technical solution of the present invention has the advantages that：
The present invention is by adding resonant cavity on the port of evaporative pattern waveguide high-pass filter, the case where not increasing waveguide length
Under, the transmission zero of the high-pass filter is realized with the zero point effect of the resonant cavity, increases Out-of-band rejection, while also reducing the height
The Insertion Loss of bandpass filter.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of first specific embodiment of evaporative pattern waveguide high-pass filter of the present invention；Include in figure：
1, coupled waveguide, 2, coupled waveguide, 3, resonant cavity, 4, mating structure, 5, mating structure, 6, waveguide turning structure, 7, evaporative pattern
Waveguide；
Fig. 2 is the side view of Fig. 1 evaporative pattern waveguide high-pass filter；
Fig. 3 is the equivalent circuit diagram of Fig. 1 evaporative pattern waveguide high-pass filter；
Fig. 4 is the structural perspective of Fig. 1 evaporative pattern waveguide high-pass filter resonance cavity segment；
Fig. 5 is the frequency response characteristic of Fig. 1 evaporative pattern waveguide high-pass filter；
Fig. 6 is the structural schematic diagram of second specific embodiment of evaporative pattern waveguide high-pass filter of the present invention；
Fig. 7 is the structural schematic diagram of evaporative pattern waveguide high-pass filter third specific embodiment of the present invention.
Specific embodiment
In view of the shortcomings of the prior art, thinking of the invention is by adding on the port of evaporative pattern waveguide high-pass filter
Resonant cavity realizes the transmission zero of the high-pass filter with the zero point effect of the resonant cavity in the case where not increasing waveguide length
Point increases Out-of-band rejection, while also reducing the Insertion Loss of the high-pass filter.
Specifically, evaporative pattern waveguide high-pass filter of the invention, including evaporative pattern waveguide and respectively with evaporative pattern
Two coupled waveguides as input/output port of waveguide both ends connection；A use is connected at least one coupled waveguide
In providing the resonant cavity of out-of-band transmission zero point, the stopband of the resonance frequency of the resonant cavity in the evaporative pattern waveguide high-pass filter
In range.
It as long as a transmission zero usually is arranged for filter, but may be that more than one biography is arranged in filter
Defeated zero point, more effectively to increase Out-of-band rejection ability, for example, be connected separately on described two coupled waveguides one it is described humorous
Shake chamber, and the resonance frequency of two resonant cavities is different, so as to increase multiple transmission zeros for filter.
Multitude of different ways can be used in the setting of resonant cavity, it is preferable that the resonant cavity is connected to its connected coupled wave
The side led, and the signal transmission direction relative to its connected coupled waveguide is vertically arranged.Alternatively, the resonant cavity is connected to
On the end face that its connected coupled waveguide is connected with evaporative pattern waveguide, and the signal transmission side relative to its connected coupled waveguide
To being arranged in parallel.In both schemes, since the latter not will increase the size of filter vertical direction, more compact structure, because
This preferred the latter of present invention.
The structure of resonant cavity determines its resonance frequency, and conventional resonant cavity comes out once manufacturing and designing, then transmission zero
Position is also just fixed up, in order to can be further arranged on the resonant cavity with flexible modulation transmission zero location
For adjusting the tuning part of its resonance frequency.The tuning part is preferably the tuning screw that can be inserted into the resonant cavity, most
It is set to the center of the resonant cavity well.
For the ease of public understanding, below with several specific embodiments and in conjunction with attached drawing come to technical solution of the present invention into
Row is further described：
Fig. 1 shows the basic structure of one embodiment, and the evaporative pattern waveguide high-pass filter of the present embodiment works in Ku wave
Section, applies to the front end of Satellite Communication System, for filtering out image signal, reduces the interference of system.As shown in Figure 1, the disappearance
Mould waveguide high-pass filter includes as the coupled waveguide 1 of filter input end mouth and output port, coupled waveguide 2 and being located at
Evaporative pattern waveguide 7 between input, output port, coupled waveguide 1 and coupled waveguide 2 are all the rectangular waveguide BJ120 of standard；Figure
In 4,5 be respectively the mating structure for connecting evaporative pattern waveguide 7 and coupled waveguide 1,2, the mating structure 4,5 in the present embodiment is
It is realized preferable for step-like mating structure with realizing the matching between port standard waveguide and filter internal evaporative pattern waveguide
Echoing characteristics；The interface dimensions of the evaporative pattern waveguide 7 of filter internal are smaller, and cutoff frequency, which is higher than, needs rejection band
Highest frequency；In order to meet performance indicator requirement, the evaporative pattern waveguide high-pass filter of the present embodiment is provided with waveguide turning knot
Structure 6 uses conventional waveguide turning structure（It is to be noted that：Waveguide turning structure is simultaneously nonessential）.As shown in Figure 1,
Be connected on the end face that coupled waveguide 1 is connected with evaporative pattern waveguide 7 one it is parallel with the signal transmission direction of coupled waveguide 1 humorous
Shake chamber 3, and the resonance frequency of resonant cavity 3 is in the stopband range of the evaporative pattern waveguide high-pass filter, specific resonance frequency
It can be arranged according to actual needs near the frequency to be inhibited.
Fig. 2 is the side view of Fig. 1 evaporative pattern waveguide high-pass filter.
Fig. 3 is the equivalent circuit diagram of Fig. 1 evaporative pattern waveguide high-pass filter, is being passed as shown in figure 3, resonant cavity 3 is equivalent to
A resonator being grounded in parallel on defeated line, by Circuit theory it is found that the frequency signal near resonance frequency is totally reflected, Bu Nengtong
It crosses, and frequency then passes through completely from the farther away information of resonance frequency.
Fig. 4 is the structural perspective of Fig. 1 evaporative pattern waveguide high-pass filter resonance cavity segment, it can be seen that 3 He of resonant cavity
The caliber size of evaporative pattern waveguide 7 is respectively less than the caliber size of coupled waveguide 1, therefore can be integrated in the same of coupled waveguide 1 simultaneously
One end face, it is on the one hand easy to process, on the other hand since its direction is parallel with coupled waveguide 1（Rather than it is vertical）, it is not take up
Additional volume effectively reduces the volume of high-pass filter.
Fig. 5 is the frequency response characteristic of the Ku wave band high-pass filter.The waveguide high-pass filter structural requirement ten
Point compact, entire size requires length to be less than 40mm, is highly less than 18mm.Performance requirement passband 13.75GHz -14.6GHz, band
Outer DC -12.8GHz requires Out-of-band rejection to be greater than 35dB.According to common waveguide high-pass filter, then in so small body
It can not achieve the requirement completely in product.As can be seen from FIG. 5, the evaporative pattern waveguide high-pass filter of the present embodiment can meet completely with
Upper performance requirement, while structure size is also met the requirements.In the high-pass filter structure can by integral forming technique realize by
One piece of metal parts is process, and production easy to process advantageously reduces production cost.
Fig. 6 shows second embodiment of the invention.As shown in fig. 6, the present embodiment is by two resonant cavities with vertical
Direction is connected to the input port and output port of the high-pass filter, and the high-pass filtering with zero point equally may be implemented
Device.If only adding a resonant cavity at a port wherein, or add the identical resonance of two resonance frequencies two ports
Chamber can then form a zero point；If two can be formed in the resonant cavity that two ports respectively add a resonance frequency different
Transmission zero.The structure and working principle of the present embodiment rest part are identical as a upper embodiment, and details are not described herein again.So
And the parallel direction resonant cavity for the Fig. 1 that compares, using the resonant cavity of vertical direction in the present embodiment, shared volume is bigger, and adds
Work is more difficult, therefore preferably with the resonant cavity of parallel direction.
Fig. 7 shows third embodiment of the invention.Similar with Fig. 1 structure, the present embodiment is as input/output terminal
It is provided with the resonant cavity of a parallel direction on one of coupled waveguide of mouth, and is arranged in the center of the resonant cavity
There is the tuning screw in a pluggable resonant cavity, passes through the resonance frequency of the adjustable resonant cavity of the tuning screw, Jin Ershi
Now adjust the position of transmission zero.The tuning screw is equivalent to a loading capacitance, and it is deeper which enters resonant cavity,
Then resonance frequency is lower, and the corresponding transmission zero generated by the resonant cavity is then lower.
In summary, the present invention on the input port and/or output port of evaporative pattern waveguide high-pass filter by setting
Simple cavity resonator structure is set, in the case where not increasing waveguide length, meeting compact-sized requirement, with the zero point of the resonant cavity
Effect realizes the transmission zero of the high-pass filter, increases Out-of-band rejection, while also reducing the Insertion Loss of the high-pass filter.This
Outside, technical solution of the present invention has the advantages of simple structure and easy realization, and has a good application prospect.
Claims (10)
1. a kind of evaporative pattern waveguide high-pass filter, connect including evaporative pattern waveguide and respectively with evaporative pattern waveguide both ends two
A coupled waveguide as input/output port；It is characterized in that, being connected with one at least one coupled waveguide for mentioning
For the resonant cavity of out-of-band transmission zero point, the stopband range of the resonance frequency of the resonant cavity in the evaporative pattern waveguide high-pass filter
It is interior.
2. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that connect respectively on described two coupled waveguides
It is connected to the resonant cavity, and the resonance frequency of two resonant cavities is different.
3. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that the resonant cavity is connected to it and is connected
The side of coupled waveguide, and the signal transmission direction relative to its connected coupled waveguide is vertically arranged.
4. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that the resonant cavity is connected to it and is connected
On the end face that coupled waveguide is connected with evaporative pattern waveguide, and the signal transmission direction relative to its connected coupled waveguide is set in parallel
It sets.
5. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that be provided on the resonant cavity for adjusting
Save the tuning part of its resonance frequency.
6. evaporative pattern waveguide high-pass filter as claimed in claim 5, which is characterized in that the tuning part is pluggable described
The tuning screw of resonant cavity.
7. evaporative pattern waveguide high-pass filter as claimed in claim 6, which is characterized in that the tuning screw is set to described humorous
The center of vibration chamber.
8. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that it is integral forming technique manufacture.
9. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that the evaporative pattern waveguide and coupled waveguide
Between connected by step-like mating structure.
10. evaporative pattern waveguide high-pass filter as described in claim 1, which is characterized in that it further includes waveguide turning structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866247.XA CN108847516B (en) | 2018-08-01 | 2018-08-01 | Lost foam waveguide high-pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866247.XA CN108847516B (en) | 2018-08-01 | 2018-08-01 | Lost foam waveguide high-pass filter |
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| Publication Number | Publication Date |
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| CN108847516A true CN108847516A (en) | 2018-11-20 |
| CN108847516B CN108847516B (en) | 2024-01-19 |
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| CN201810866247.XA Active CN108847516B (en) | 2018-08-01 | 2018-08-01 | Lost foam waveguide high-pass filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504945A (en) * | 2019-08-05 | 2019-11-26 | 电子科技大学 | A kind of restructural loop filtering device |
| CN111326838A (en) * | 2020-02-17 | 2020-06-23 | 电子科技大学 | Miniaturized waveguide filter based on evanescent mode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564835A1 (en) * | 2004-02-16 | 2005-08-17 | Siemens Mobile Communications S.p.A. | Inline waveguide filter with up to two out-of-band transmission zeros |
| CN201084809Y (en) * | 2007-09-07 | 2008-07-09 | 西安达威通信设备有限公司 | A Ku wave band bypass coupling wave-guide filter |
| CN106129552A (en) * | 2016-08-30 | 2016-11-16 | 江苏贝孚德通讯科技股份有限公司 | A kind of millimeter waveguide high pass filter |
| CN208753478U (en) * | 2018-08-01 | 2019-04-16 | 江苏贝孚德通讯科技股份有限公司 | A kind of evaporative pattern waveguide high-pass filter |
-
2018
- 2018-08-01 CN CN201810866247.XA patent/CN108847516B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564835A1 (en) * | 2004-02-16 | 2005-08-17 | Siemens Mobile Communications S.p.A. | Inline waveguide filter with up to two out-of-band transmission zeros |
| CN201084809Y (en) * | 2007-09-07 | 2008-07-09 | 西安达威通信设备有限公司 | A Ku wave band bypass coupling wave-guide filter |
| CN106129552A (en) * | 2016-08-30 | 2016-11-16 | 江苏贝孚德通讯科技股份有限公司 | A kind of millimeter waveguide high pass filter |
| CN208753478U (en) * | 2018-08-01 | 2019-04-16 | 江苏贝孚德通讯科技股份有限公司 | A kind of evaporative pattern waveguide high-pass filter |
Non-Patent Citations (1)
| Title |
|---|
| 吴须大: "消失模波导滤波器的新结构", 空间电子技术, no. 4 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504945A (en) * | 2019-08-05 | 2019-11-26 | 电子科技大学 | A kind of restructural loop filtering device |
| CN110504945B (en) * | 2019-08-05 | 2022-12-02 | 电子科技大学 | Reconfigurable annular filtering device |
| CN111326838A (en) * | 2020-02-17 | 2020-06-23 | 电子科技大学 | Miniaturized waveguide filter based on evanescent mode |
| CN111326838B (en) * | 2020-02-17 | 2021-08-03 | 电子科技大学 | Miniaturized waveguide filter based on evanescent mode |
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| CN108847516B (en) | 2024-01-19 |
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