CN202997011U - Double-hole compact type waveguide directional filter - Google Patents
Double-hole compact type waveguide directional filter Download PDFInfo
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- CN202997011U CN202997011U CN 201320016189 CN201320016189U CN202997011U CN 202997011 U CN202997011 U CN 202997011U CN 201320016189 CN201320016189 CN 201320016189 CN 201320016189 U CN201320016189 U CN 201320016189U CN 202997011 U CN202997011 U CN 202997011U
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Abstract
The utility model discloses a double-hole compact type waveguide directional filter. The double-hole compact type waveguide directional filter comprises a main waveguide, a secondary waveguide, anda first filter and a second filter arranged between the main waveguide and the secondary waveguide, wherein the input ends of the first filter and the second filter are respectively communicated with the main waveguide by coupling holes, the output ends of the first filter and the second filter are respectively communicated with the secondary waveguide by coupling holes, the distance between the center points of the two coupling holes communicated with the main waveguide is X, the distance between the center points of the two coupling holes communicated with the complementary waveguide is Y, X and Y are smaller than or equal to 60% of the wavelength of the main waveguide at the center frequency of a first filter passband. The double-hole compact type waveguide directional filter has features of simple and compact structure, wide working frequency band, and low processing and debugging cost, etc., and can form a multi-path multi-plexer, and a complementary type diplexer or the like, and also can be widely used in radar, missile guidance, communication and other fields.
Description
Technical field
The utility model relates to a kind of filter, specifically, relates to a kind of broadband compact waveguide directional filter of symmetric form diplopore coupling.
Background technology
Filter is a kind of general original paper in modern microwave communication and Military Electronics system.Directional filter is because the conventional filter of input reflectance is much lower, in some occasions that device matching is had relatively high expectations, such as in high-power power amplifier, important application being arranged.Another important use of directional filter is to lead to-band drag complementary duplexer as band.Existing waveguide directional filter comprises cylindrical cavity two-mode waveguide directional filter and utilizes two kinds of Slot Coupled Waveguide Hybrids and two waveguide directional filters that filter is realized.The former is 3-D solid structure, need to be divided into a plurality of parts and process respectively, then assemble and weld by precision, and then debugging, cause cost up.The latter makes the volume of device larger due to the use of two kinds of Slot Coupled Waveguide Hybrids.Simultaneously, because the bandwidth of kinds of Slot Coupled Waveguide Hybrids is narrower, the bandwidth of the waveguide directional filter of formation is narrower.According to transmission line theory, the input of two band pass filters and output are coupled with two transmission lines respectively, if the difference of the spacing between the spacing between the input Coupling point and output Coupling point is 180 degree, also can consist of directional filter.But utilize rectangular waveguide to realize the design of this directional filter, so far there are no reports.
The utility model content
But the purpose of this utility model is to provide a kind of plane to place, structure is single, take up an area the little diplopore compact waveguide directional filter of volume.
to achieve these goals, the technical solution adopted in the utility model is as follows: diplopore compact waveguide directional filter, comprise that main waveguide and complementary wave lead, also comprise the first filter and the second filter between being arranged on main waveguide and complementary wave leads, be respectively equipped with input port and output port A on the two ends of main waveguide, be respectively equipped with output port B and isolated port on the two ends that complementary wave is led, the input of the input of the first filter and the second filter is respectively by coupling aperture and main waveguide UNICOM, the output of the output of the first filter and the second filter also leads logical by a coupling aperture and complementary wave respectively, and the spacing between the central point of two coupling apertures of main waveguide UNICOM is X, and the spacing that complementary wave leads between the central point of two logical coupling apertures is Y, when X and Y are less than or equal to the centre frequency of the first filter passband 60% of the guide wavelength of master's waveguide.
It is all the empty waveguide of rectangle that described main waveguide and complementary wave are led.
In order to increase the pass band width of diplopore compact waveguide directional filter, in described coupling aperture, be provided with the metal column that the bottom surface is connected with the coupling aperture inner bottom surface, all there is the gap in metal column its lap except the bottom surface with coupling aperture.
In order to increase the pass band width of diplopore compact waveguide directional filter, the one side that is connected to close the second filter of coupling aperture on the first filter flushes with the one side of the first filter near the second filter, and the one side that is connected to close the first filter of coupling aperture on two filters flushes with the one side of the second filter near the first filter.
The upper surface of the upper surface of the upper surface that the upper surface of described main waveguide, complementary wave are led, the first filter, the second filter and the upper surface of coupling aperture all are in same plane.
The first filter and the second filter consist of by some resonant cavitys of series connection, are provided with metallic object in resonant cavity.
Main waveguide and complementary wave are led a plane C between leading with respect to main waveguide and complementary wave to be mirror image symmetrical, and this plane C is vertical with the first filter axis.
It is symmetrical that the first filter and the second filter are mirror image with respect to a plane D between the first filter and the second filter, and described plane D is vertical with main waveguide axis.
The axis that main waveguide and complementary wave are led is parallel to each other, and the axis of the axis of the first filter and the second filter is parallel to each other and all perpendicular to the axis of main waveguide.
When X and Y are less than or equal to the centre frequency of the first filter passband 60% of the guide wavelength of master's waveguide.Be conducive to the miniaturization setting of device.
It is symmetrical that a plane C between the utility model is led with respect to main waveguide and complementary wave is mirror image, this plane C is vertical with the first filter axis, namely main waveguide and complementary wave are led a plane C between leading with respect to main waveguide and complementary wave to be mirror image symmetrical, and this plane C is vertical with the first filter axis.
Calculate and design for convenient, it is symmetrical that the utility model is mirror image with respect to a plane D between the first filter and the second filter, and this moment, described plane D was vertical with main waveguide axis.Namely to be mirror image with respect to a plane D between the first filter and the second filter symmetrical for the first filter and the second filter, and described plane D is vertical with main waveguide axis.
For convenient processing, assembling and debugging, the upper surface of the upper surface that the upper surface of main waveguide described in the utility model, complementary wave are led, the first filter, the upper surface of the second filter and the upper surface of coupling aperture all are in same plane.
The centre frequency of the first filter passband is consistent with the centre frequency of the second filter passband, and when the centre frequency of the first filter passband, main waveguide is consistent with the guide wavelength that complementary wave is led.
The directional filter of in the past doing with microstrip line or strip line, the distance between two joints of the distance between two joints of its connection main line and connection by-pass is inconsistent.And the utility model can accomplish to possess by two pairs of consistent coupling apertures of standoff distance the directional filter of said function, arranges thereby change it, arranges as benchmark take symmetrical and plane, reduces it and takes up an area the space, makes range of application wider.
Specifically, maximum characteristics of the present utility model are to have removed two kinds of Slot Coupled Waveguide Hybrids, are conducive to the miniaturization of device.Simultaneously, distance between two coupling apertures of the first filter and the second filter and main waveguide UNICOM is identical with the distance that the first filter and the second filter and complementary wave lead between two logical coupling apertures, rather than differing guide wavelength half, the volume of device further reduces.For convenient processing, assembling and debugging, reduce device cost, described main waveguide, complementary wave is led, the first filter, the upper surface flush of the second filter and coupling aperture after making all microwave structures all be arranged on base and can machining by Numerical-control Milling Machines is disposable, adds that the cover plate of flat shape is completed.
Operation principle of the present utility model can be summarized as follows: microwave signal is input in this diplopore compact waveguide directional filter by the input port in main waveguide, enters respectively the input of the first filter and the second filter by two coupling apertures.If the frequency of this signal is positioned at the passband of the first filter and the second filter, two signals will be respectively by the output port B of two filters on complementary wave is led with superimposed, export from output port B.In isolated port, when here superposeing due to two signals, single spin-echo, power output is very little.Its microwave signal medium process is: microwave signal coupling aperture, one section complementary wave of the coupling aperture by main waveguide, the first filter input end, the first filter, the first filter output is successively led, the coupling aperture of the coupling aperture of the second filter output, the second filter, the second filter input end, is got back to the output port A place of main waveguide, directly propagate into the signal inversion of output port A in microwave signal herein and main waveguide, power output is very little.If the frequency of this signal is positioned at outside the passband of the first filter and the second filter, two signals will respectively in the input of the first filter and the second filter is reflected back main waveguide, be exported from output port A.This shows, the signal that is positioned at two filter passbands is exported from output port B, being positioned at the outer signal of two filter passbands exports from output port A. and the reflection of input port is very little, in isolated port, power output is very little, thereby has realized well the function of directional filter or complementary duplexer.
Due to the symmetry of device, can select arbitrary port that main waveguide and complementary wave lead as input port.At this moment, output port and isolated port should adjust accordingly.
Diplopore compact waveguide directional filter of the present utility model has the characteristics such as simple and compact for structure, that working band is wide, the processing and debugging cost is low, multichannel multiplexer, reflectionless filter and complementary type duplexer etc. be can consist of, military affairs and the civil areas such as radar, missile guidance, communication are widely used in.
Description of drawings
Fig. 1 is vertical view of the present utility model.
Fig. 2 is the vertical view of embodiment 1.
Fig. 3 is the result of calculation curve of embodiment 1.
Fig. 4 is the vertical view of embodiment 2.
The corresponding title of attached number in the figure: the 1-input port, 2-output port A, 3-output port B, the 4-isolated port, 5-master's waveguide, the 6-complementary wave is led, 7-the first filter, 8-the second filter, 9-coupling aperture, 10-metal column, 11-metallic object.
Embodiment
as Fig. 1, shown in 2, diplopore compact waveguide directional filter, comprise that axis main waveguide 5 and complementary wave parallel to each other lead 6, comprise that also being arranged on main waveguide 5 and complementary wave leads the first filter 7 and the second filter 8 between 6, the axis of the axis of the first filter 7 and the second filter 8 is parallel to each other and all perpendicular to the axis of main waveguide 5, be respectively equipped with input port 1 and output port A2 on the two ends of main waveguide 5, complementary wave is led on 6 two ends and is respectively equipped with output port B3 and isolated port 4, the input of the input of the first filter 7 and the second filter 8 is respectively by a coupling aperture 9 and main waveguide 5 UNICOMs, the output of the output of the first filter 7 and the second filter 8 is also led 6 UNICOMs by a coupling aperture 9 and complementary wave respectively, and the spacing between the central point of two coupling apertures 9 of main waveguide 5 UNICOMs is X, and the spacing that complementary wave is led between the central point of two coupling apertures 9 of 6 UNICOMs is Y, when X and Y are less than or equal to the centre frequency of the first filter 7 passbands 60% of the guide wavelength of master's waveguide 5.
The first filter 7 and the second filter 8 are all 3 grades of direct-coupling cavity filters.
It is all the empty waveguide of rectangle that described main waveguide 5 and complementary wave lead 6.
In order to increase the pass band width of diplopore compact waveguide directional filter, in described coupling aperture 9, be provided with the metal column 10 that the bottom surface is connected with coupling aperture 9 inner bottom surfaces, all there is the gap in metal column 10 its lap except the bottom surface with coupling aperture 9.
In order to increase the pass band width of diplopore compact waveguide directional filter, the madial wall that is connected to coupling aperture 9 close the second filters 8 on the first filter 7 flushes with the madial wall of the first filter 7 near the second filters 8, and the madial wall that is connected to coupling aperture 9 close the first filters 7 on the second filter 8 flushes with the madial wall of the second filter 8 near the first filters 7.
The upper surface of described main waveguide 5, complementary wave are led 6 upper surface, the upper surface of the first filter 7, the upper surface of the second filter 8 and the upper surface of coupling aperture 9 and all are in same plane.
It is symmetrical that the first filter 7 and the second filter 8 are mirror image with respect to a plane D between the first filter 7 and the second filter 8, and described plane D is vertical with main waveguide 5 axis.
When X and Y are less than or equal to the centre frequency of the first filter 7 passbands 60% of the guide wavelength of master's waveguide 5.Be conducive to the miniaturization setting of device.
Microwave signal is input in this diplopore compact waveguide directional filter by the input port 1 in main waveguide 5, enters respectively the input of the first filter 7 and the second filter 8 by two coupling apertures 9.If the frequency of this signal is positioned at the passband of the first filter 7 and the second filter 8, two signals will be respectively led output port B3 on 6 with superimposed by two filters at complementary wave, export from output port B3.In isolated port 4, when here superposeing due to two signals, single spin-echo, power output is very little.Microwave signal successively coupling aperture, coupling aperture 9 that one section complementary wave is led the 6, second filter 8 outputs, the second filter 8, second filter 8 inputs of the coupling aperture by main waveguide 5, the first filter input end, the first filter 7, the first filter output coupling aperture 9, get back to the output port A2 place of main waveguide 5, directly propagate into the signal inversion of output port A2 in microwave signal herein and main waveguide 5, power output is very little.If the frequency of this signal is positioned at outside the passband of the first filter 7 and the second filter 8, two signals will respectively in the input of the first filter 7 and the second filter 8 is reflected back main waveguide 5, be exported from output port A2.This shows, the signal that is positioned at two filter passbands is exported from output port B3, being positioned at the outer signal of two filter passbands exports from output port A2. and the reflection of input port 1 is very little, in isolated port 4, power output is very little, thereby has realized well the function of directional filter or complementary duplexer.
The S parameter of this diplopore compact waveguide directional filter that obtains according to the Structure Calculation of embodiment 1 as shown in Figure 3.As can be seen from the figure, in the bandwidth of operation of 12GHz, the reflection of the input port 1 of main waveguide is all lower than-10dB 8, and the output on isolated port 4 is lower than-15dB.In the passband of 10.8 ~ 11GHz, the output of output port B3 is higher than-0.5dB, and the output of output port A2 is lower than-15dB.In the frequency range of 8 ~ 11.6GHz and 11.2 ~ 12GHz, the output of output port A2 is higher than-0.5dB.Therefore, this embodiment provides a bandwidth to cover 8 ~ 12GHz, the compact waveguide directional filter of passband frequency band 0.2GHz.
As Fig. 4. only be with the difference of embodiment 1, the first filter 7 and the second filter 8 consist of by some resonant cavitys of series connection, are provided with metallic object 11 in resonant cavity.
Above-mentioned only for giving an example.In actual production, the progression of the first filter 7 and the second filter 8 can be 1 grade or multistage, and structure not only can be waveguiding structure, also can be little band, band line, cavity body structure, etc.Due to the symmetry of device, can select main waveguide 5 and complementary wave to lead arbitrary port on 6 as input port.At this moment, output port and isolated port should adjust accordingly.
As mentioned above, can realize preferably the utility model.
Claims (9)
1. diplopore compact waveguide directional filter, it is characterized in that, comprise that main waveguide (5) and complementary wave lead (6), comprise that also being arranged on main waveguide (5) and complementary wave leads the first filter (7) and the second filter (8) between (6), be respectively equipped with input port (1) and output port A(2 on the two ends of main waveguide (5)), complementary wave is led on the two ends of (6) and is respectively equipped with output port B(3) and isolated port (4), the input of the input of the first filter (7) and the second filter (8) is respectively by a coupling aperture (9) and main waveguide (5) UNICOM, the output of the output of the first filter (7) and the second filter (8) is also led (6) UNICOM by a coupling aperture (9) and complementary wave respectively, and the spacing between the central point of two coupling apertures (9) of main waveguide (5) UNICOM is X, and the spacing that complementary wave is led between the central point of two coupling apertures (9) of (6) UNICOM is Y, when X and Y are less than or equal to the centre frequency of the first filter (7) passband 60% of the guide wavelength of master's waveguide (5).
2. diplopore compact waveguide directional filter according to claim 1, is characterized in that, it is all the empty waveguide of rectangle that described main waveguide (5) and complementary wave are led (6).
3. diplopore compact waveguide directional filter according to claim 1, it is characterized in that, in described coupling aperture (9), be provided with the metal column (10) that the bottom surface is connected with coupling aperture (9) inner bottom surface, all there is the gap in metal column (10) its lap except the bottom surface with coupling aperture (9).
4. diplopore compact waveguide directional filter according to claim 1, it is characterized in that, the madial wall that is connected to close the second filter (8) of coupling aperture (9) on the first filter (7) flushes with the madial wall of the first filter (7) near the second filter (8), and the madial wall that is connected to close the first filter (7) of coupling aperture (9) on the second filter (8) flushes with the madial wall of the second filter (8) near the first filter (7).
5. the described diplopore compact of any one waveguide directional filter according to claim 1-4, it is characterized in that, upper surface, the complementary wave of described main waveguide (5) led the upper surface of the upper surface of (6), the first filter (7), the upper surface of the second filter (8) and the upper surface of coupling aperture (9) and all is in same plane.
6. the described diplopore compact of any one waveguide directional filter according to claim 1-4, is characterized in that, the first filter (7) and the second filter (8) consist of by some resonant cavitys of series connection, are provided with metallic object (11) in resonant cavity.
7. the described diplopore compact of any one waveguide directional filter according to claim 1-4, it is characterized in that, main waveguide (5) and complementary wave are led (6) and are led a plane C between (6) with respect to main waveguide (5) and complementary wave to be mirror image symmetrical, and this plane C is vertical with the first filter (7) axis.
8. the described diplopore compact of any one waveguide directional filter according to claim 1-4, it is characterized in that, it is symmetrical that the first filter (7) and the second filter (8) are mirror image with respect to a plane D between the first filter (7) and the second filter (8), and described plane D is vertical with main waveguide (5) axis.
9. the described diplopore compact of any one waveguide directional filter according to claim 1-4, it is characterized in that, it is parallel to each other that main waveguide (5) and complementary wave are led the axis of (6), and the axis of the axis of the first filter (7) and the second filter (8) is parallel to each other and all perpendicular to the axis of main waveguide (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016189 CN202997011U (en) | 2013-01-14 | 2013-01-14 | Double-hole compact type waveguide directional filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016189 CN202997011U (en) | 2013-01-14 | 2013-01-14 | Double-hole compact type waveguide directional filter |
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| CN202997011U true CN202997011U (en) | 2013-06-12 |
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| CN 201320016189 Withdrawn - After Issue CN202997011U (en) | 2013-01-14 | 2013-01-14 | Double-hole compact type waveguide directional filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050750A (en) * | 2013-01-14 | 2013-04-17 | 成都赛纳赛德科技有限公司 | Dual-hole compact wave guide directional filter |
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2013
- 2013-01-14 CN CN 201320016189 patent/CN202997011U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050750A (en) * | 2013-01-14 | 2013-04-17 | 成都赛纳赛德科技有限公司 | Dual-hole compact wave guide directional filter |
| CN103050750B (en) * | 2013-01-14 | 2014-08-06 | 成都赛纳赛德科技有限公司 | Dual-hole compact wave guide directional filter |
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Granted publication date: 20130612 Effective date of abandoning: 20140806 |
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