CN103022603B - Single hole compact waveguide directional filter - Google Patents
Single hole compact waveguide directional filter Download PDFInfo
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- CN103022603B CN103022603B CN201310011531.6A CN201310011531A CN103022603B CN 103022603 B CN103022603 B CN 103022603B CN 201310011531 A CN201310011531 A CN 201310011531A CN 103022603 B CN103022603 B CN 103022603B
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Abstract
The present invention discloses single hole compact waveguide directional filter, comprise main waveguide and complementary wave is led, also comprise be arranged on main waveguide and complementary wave lead between the first filter and the second filter, the input of the first filter and the input of the second filter are all by same coupling aperture and main waveguide UNICOM, the output of the first filter and the output of the second filter also all lead logical by same coupling aperture and complementary wave, be X with the width of the coupling aperture of main waveguide UNICOM, be that Y(width refers to the length of side of coupling aperture along the one side on main waveguide axis or complementary wave guide shaft line with the lead width of logical coupling aperture of complementary wave), 60% of the guide wavelength of main waveguide when X and Y is less than or equal to the centre frequency of the first filter passband.The present invention has the features such as simple and compact for structure, working band is wide, processing and debugging cost is low, can form multichannel multiplexer, reflectionless filter and complementary type duplexer etc., be widely used in the fields such as radar, missile guidance, communication.
Description
Technical field
The present invention relates to a kind of filter, specifically, relate to the broadband compact waveguide directional filter of a kind of symmetric form single hole coupling.
Background technology
Filter is the general original paper of one in modern microwave communication and Military Electronics system.Directional filter due to input reflectance Conventional filters much lower, at some, higher occasion is required to device matching, in such as high-power power amplifier, has important application.Another important use of directional filter is used as band to lead to-band drag complementary duplexer.The waveguide directional filter that existing waveguide directional filter comprises cylindrical cavity two-mode waveguide directional filter and utilizes two kinds of Slot Coupled Waveguide Hybrids and two filters to realize.The former is 3-D solid structure, needs to be divided into multiple part and processes respectively, then by Fine Boring and welding, and then debug, cause cost up.The latter, due to the use of two kinds of Slot Coupled Waveguide Hybrids, makes the volume of device larger.Meanwhile, 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 respectively by a coupling aperture and two transmission line coupling, if when phase difference is 180 degree when the input signal of two band pass filters is transferred to isolated port, also can directional filter be formed.But utilize rectangular waveguide to realize the design of this directional filter, be not reported so far.
Summary of the invention
The object of the present invention is to provide a kind of can plane be placed, structure is single, take up an area the little single hole compact waveguide directional filter of volume.
To achieve these goals, the technical solution used in the present invention is as follows: single hole compact waveguide directional filter, comprise main waveguide and complementary wave is led, also comprise be arranged on main waveguide and complementary wave lead between the first filter and the second filter, the two ends of main waveguide are respectively equipped with input port and output port A, the two ends that complementary wave is led are respectively equipped with output port B and isolated port, the filter input end mouth of the first filter and the filter input end mouth of the second filter are all by same coupling aperture and main waveguide UNICOM, the filter output mouth of the first filter and the filter output mouth of the second filter also all lead logical by same coupling aperture and complementary wave, be X with the width of the coupling aperture of main waveguide UNICOM, be Y with the lead width of logical coupling aperture of complementary wave, 60% of the guide wavelength of main waveguide when X and Y is less than or equal to the centre frequency of the first filter passband.The width of coupling aperture refers to the length of side of coupling aperture along the one side on main waveguide axis or complementary wave guide shaft line.
It is all the empty waveguide of rectangle that described main waveguide and complementary wave are led.
In order to make the structure of single hole compact waveguide directional filter compacter, the filter input end mouth of the first filter and the second filter is by a common coupling aperture input signal, and the filter output mouth of the first filter and the second filter passes through a common coupling aperture and outputs signal.
In order to make the structure of single hole compact waveguide directional filter compacter, be connected to filter input end mouth on the first filter and filter output mouth flushes with the madial wall of the first filter near the second filter near the madial wall of the second filter, be connected to filter input end mouth on the second filter and filter output mouth near the madial wall of the first filter, flush with the madial wall of the second filter near the first filter.
The filter input end mouth of the upper surface that the upper surface of described main waveguide, complementary wave are led, the upper surface of the first filter, the first filter and the upper surface of filter output mouth, the upper surface of the second filter, the filter input end mouth of the second filter and the upper surface of filter output mouth and the upper surface of coupling aperture are all in same plane.
First filter and the second filter, by some resonant cavitys formations of series connection, are provided with metallic object in resonant cavity.
Main waveguide and complementary wave lead and to lead relative to main waveguide and complementary wave between a plane C be specular distribution, this plane C and the first filter axes normal.
First filter and the second filter are specular distribution relative to the plane D of between the first filter and the second filter, described plane D and main waveguide axes normal.
The axis that main waveguide and complementary wave are led is parallel to each other, the axis of the first filter and the axis of the second filter parallel to each other and all perpendicular to the axis of main waveguide.
60% of the guide wavelength of main waveguide when X and Y is less than or equal to the centre frequency of the first filter passband.The miniaturization being conducive to device is arranged.
A plane C between the present invention leads relative to main waveguide and complementary wave is specular distribution, this plane C and the first filter axes normal, namely main waveguide and complementary wave lead and to lead relative to main waveguide and complementary wave between a plane C be specular distribution, this plane C and the first filter axes normal.
Conveniently calculate and design, the present invention is specular distribution relative to the plane D of between the first filter and the second filter, now described plane D and main waveguide axes normal.Namely the first filter and the second filter are specular distribution relative to the plane D of between the first filter and the second filter, described plane D and main waveguide axes normal.
Conveniently process, assemble and debug, the filter input end mouth of the upper surface that the upper surface of main waveguide described in the present invention, complementary wave are led, the upper surface of the first filter, the first filter and the upper surface of filter output mouth, the upper surface of the second filter, the filter input end mouth of the second filter and the upper surface of filter output mouth and the upper surface of coupling aperture are all 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.
In the past with the directional filter that microstrip line or strip line do, the distance between two joints of the Distance geometry connection by-pass between two joints of its connection main line was inconsistent.And the present invention can accomplish by a single hole directional filter possessing said function, thus change its arrangement, with symmetrical and planar arrangement for benchmark, reduce its occupation of land space, make range of application wider.
Specifically, maximum feature of the present invention eliminates two kinds of Slot Coupled Waveguide Hybrids, is conducive to the miniaturization of device.Simultaneously, the filter input end mouth of the first filter and the second filter is by a common coupling aperture input signal, the filter input end mouth of the first filter and the second filter is outputed signal by a common coupling aperture, first filter is identical with the coupling aperture width that filter output mouth and the complementary wave of the second filter lead logical with the first filter with the coupling aperture width of main waveguide UNICOM with the filter input end mouth of the second filter, instead of difference half guide wavelength, the volume of device reduces further.Conveniently process, assemble and debug, reduce device cost, described main waveguide, complementary wave is led, first filter and filter input end mouth thereof and filter output mouth, the upper surface flush of the second filter and filter input end mouth and filter output mouth and coupling aperture, makes all microwave structures all be arranged on base and also by after the disposable processing of Numerical-control Milling Machines, can add that the cover plate of flat shape completes.
Operation principle of the present invention can be summarized as follows: microwave signal is input in this single hole compact waveguide directional filter by the filter input end mouth in main waveguide, is entered the input of the first filter and the second filter by coupling aperture respectively.If the frequency of this signal is positioned at the passband of the first filter and the second filter, two signals, by respectively by the output port B in-phase stacking of two filters on complementary wave is led, export from output port B.In isolated port, due to two signals here superpose time, phase place is contrary, and power output is very little.Its microwave signal medium process is: microwave signal is successively by main waveguide, the coupling aperture of the filter input end mouth of the first filter and the second filter, first filter, coupling aperture or the complementary wave of one section of first filter and the second filter output are led, the coupling aperture of the filter output mouth of the first filter and the second filter, second filter, the coupling aperture of the filter input end mouth of the first filter and the second filter, get back to the output port A place of main waveguide, the signal inversion of output port A is directly propagated 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, by returning in main waveguide at the filter input end oral reflex of the first filter and the second filter respectively, export from output port A.As can be seen here, the signal being positioned at two filter passbands exports from output port B, the signal be positioned at outside 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, thus achieves the function of directional filter or complementary duplexer well.
Due to the symmetry of device, arbitrary port that main waveguide and complementary wave are led can be selected as input port.At this moment, output port and isolated port should adjust accordingly.
Single hole compact waveguide directional filter of the present invention has the features such as simple and compact for structure, working band is wide, processing and debugging cost is low, multichannel multiplexer, reflectionless filter and complementary type duplexer etc. can be formed, be widely used in military affairs and the civil areas such as radar, missile guidance, communication.
Accompanying drawing explanation
Fig. 1 is vertical view of the present invention.
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: 1-input port, 2-output port A, 3-output port B, 4-isolated port, the main waveguide of 5-, 6-complementary wave is led, 7-first filter, 8-second filter, 9-coupling aperture, 10-filter input end mouth, 11-filter output mouth, 12-metallic object.
Embodiment
Embodiment 1
As Fig. 1, shown in 2, single hole compact waveguide directional filter, comprise axis main waveguide 5 parallel to each other and complementary wave leads 6, also comprise be arranged on main waveguide and complementary wave lead between the first filter 7 and the second filter 8, the two ends of main waveguide are respectively equipped with input port 1 and output port A2, the two ends that complementary wave is led are respectively equipped with output port B3 and isolated port 4, the filter input end mouth 10 of the first filter and the filter input end mouth 10 of the second filter are all by same coupling aperture 9 and main waveguide 5 UNICOM, the filter output mouth 11 of the first filter and the filter output mouth 11 of the second filter also all lead 6 UNICOMs by same coupling aperture 9 with complementary wave, be X with the width of the coupling aperture 9 of main waveguide 5 UNICOM, the width of leading the coupling aperture 9 of 6 UNICOMs with complementary wave is Y, 60% of the guide wavelength of main waveguide when X and Y is less than or equal to the centre frequency of the first filter 7 passband.
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 make the structure of single hole compact waveguide directional filter compacter, the filter input end mouth 10 of the first filter 7 and the second filter 8 is by common coupling aperture 9 input signal, and the filter output mouth 11 of the first filter 7 and the second filter 8 is outputed signal by a common coupling aperture 9.
In order to make the structure of single hole compact waveguide directional filter compacter, be connected to filter input end mouth 10 on the first filter 7 and filter output mouth 11 flushes with the madial wall of the first filter 7 near the second filter 8 near the madial wall of the second filter 8, be connected to filter input end mouth 10 on the second filter 8 and filter output mouth 11 near the madial wall of the first filter 7, flush with the madial wall of the second filter 8 near the first filter 7.
The upper surface of described main waveguide 5, complementary wave lead 6 upper surface, the upper surface of the first filter 7, the upper surface of the filter input end mouth 10 of the first filter 7 and filter output mouth 11, the upper surface of the second filter 8, the filter input end mouth 10 of the second filter 8 and the upper surface of filter output mouth 11 and coupling aperture 9 upper surface be all in same plane.
Main waveguide 5 and complementary wave lead 6 to lead relative to main waveguide and complementary wave between a plane C be specular distribution, this plane C and the first filter 7 axes normal.
First filter 7 and the second filter 8 are specular distribution relative to a plane D between the first filter 7 and the second filter 8, described plane D and main waveguide 5 axes normal.
Main waveguide 5 and complementary wave lead 6 axis parallel to each other, the axis of the first filter 7 and the axis of the second filter 8 parallel to each other and all perpendicular to the axis of main waveguide 5.
60% of the guide wavelength of main waveguide 5 when X and Y is less than or equal to the centre frequency of the first filter 7 passband.The miniaturization being conducive to device is arranged.
Microwave signal is input in this single hole compact waveguide directional filter by the input port 1 in main waveguide 5, is transferred to the filter input end mouth of the first filter 7 and the second filter 8 by the coupling aperture 9 of the filter input end mouth of the first filter 7 and the second filter 8.If the frequency of this signal is positioned at the passband of the first filter 7 and the second filter 8, the output port B3 in-phase stacking that signal will to be led at complementary wave respectively by two filters on 6, exports from output port B3.In isolated port 4, due to two signals here superpose time, phase place is contrary, and power output is very little.Microwave signal is successively by main waveguide 5, the coupling aperture 9 of the filter input end mouth 10 of the first filter 7 and the second filter 8, first filter 7, coupling aperture 9 or the complementary wave of the filter output mouth 11 of one section of first filter 7 and the second filter 8 lead 6, the coupling aperture 9 of the filter output mouth of the first filter 7 and the second filter 8, second filter 8, the coupling aperture 9 of the filter input end mouth of the first filter 7 and the second filter 8, get back to the output port A2 place of main waveguide 5, the signal inversion of output port A2 is directly propagated 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, by returning in main waveguide at the filter input end oral reflex of the first filter 7 and the second filter 8 respectively, export from output port A2.As can be seen here, the signal being positioned at two filter passbands exports from output port B3, and the signal be positioned at outside two filter passbands exports from output port A2.The reflection of input port 1 is very little, and in isolated port 4, power output is very little, thus achieves the function of directional filter or complementary duplexer well.
The S parameter of this single hole compact waveguide directional filter obtained according to the Structure Calculation of embodiment 1 as shown in Figure 3.As can be seen from the figure, in 6.5 bandwidth of operation to 9.6GHz, the reflection of the input port 1 of main waveguide 5 is all lower than-10dB, and the output in isolated port 4 is lower than-15dB.In the passband of 7.93 ~ 8.13GHz, 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 6.5 ~ 7.85GHz and 8.2 ~ 9.6GHz, the output of output port A2 is higher than-0.5dB.Therefore, this embodiment provides a bandwidth and covers 6.5 ~ 9.6GHz, the compact waveguide directional filter of passband frequency band 0.2GHz.
Embodiment 2
As Fig. 4. be only with the difference of embodiment 1, the first filter 7 and the second filter 8, by some resonant cavitys formations of series connection, are provided with metallic object 12 in resonant cavity.
Above are only citing.In actual production, the progression of the first filter 7 and the second filter 8 can be 1 grade or multistage, and structure can be not only waveguiding structure, also can be micro-band, band line, cavity body structure, etc.Due to the symmetry of device, main waveguide 5 and complementary wave can be selected to lead arbitrary port on 6 as input port.At this moment, output port and isolated port should adjust accordingly.
As mentioned above, the present invention can be realized preferably.
Claims (9)
1. single hole compact waveguide directional filter, it is characterized in that, comprise main waveguide (5) and complementary wave is led (6), also comprise and be arranged on main waveguide (5) and complementary wave and lead the first filter (7) between (6) and the second filter (8), the two ends of main waveguide (5) are respectively equipped with input port (1) and output port A(2), the two ends that complementary wave is led (6) are respectively equipped with output port B(3) and isolated port (4), the filter input end mouth (10) of the first filter (7) and the filter input end mouth (10) of the second filter (8) are all by same coupling aperture (9) and main waveguide (5) UNICOM, the filter output mouth (11) of the first filter (7) and the filter output mouth (11) of the second filter (8) also all lead (6) UNICOM by same coupling aperture (9) and complementary wave, be X with the width of the coupling aperture (9) of main waveguide (5) UNICOM, the width of leading the coupling aperture (9) of (6) UNICOM with complementary wave is Y, 60% of the guide wavelength of main waveguide (5) when X and Y is less than or equal to the centre frequency of the first filter (7) passband.
2. single hole 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 lead (6).
3. single hole compact waveguide directional filter according to claim 1, it is characterized in that, the filter input end mouth (10) of the first filter (7) and the second filter (8) is by common coupling aperture (9) input signal, and the filter output mouth (11) of the first filter (7) and the second filter (8) is outputed signal by a common coupling aperture (9).
4. single hole compact waveguide directional filter according to claim 1, it is characterized in that, be connected to filter input end mouth (10) on the first filter (7) and filter output mouth (11) flushes with the madial wall of the first filter (7) near the second filter (8) near the madial wall of the second filter (8), the madial wall being connected to filter input end mouth (10) on the second filter (8) and close first filter (7) of filter output mouth (11) flushes with the madial wall of close first filter (7) of the second filter (8).
5. according to the single hole compact waveguide directional filter in claim 1-4 described in any one, it is characterized in that, the upper surface of described main waveguide (5), complementary wave lead the upper surface of the upper surface of (6), the upper surface of the first filter (7), the filter input end mouth (10) of the first filter (7) and filter output mouth (11), the upper surface of the second filter (8), the filter input end mouth (10) of the second filter (8) and the upper surface of filter output mouth (11) and the upper surface of coupling aperture (9) is all in same plane.
6. according to the single hole compact waveguide directional filter in claim 1-4 described in any one, it is characterized in that, the first filter (7) and the second filter (8), by some resonant cavitys formations of series connection, are provided with metallic object (12) in resonant cavity.
7. according to the single hole compact waveguide directional filter in claim 1-4 described in any one, it is characterized in that, it is specular distribution that main waveguide (5) and complementary wave lead (6) relative to main waveguide (5) and the complementary wave plane C led between (6), this plane C and the first filter (7) axes normal.
8. according to the single hole compact waveguide directional filter in claim 1-4 described in any one, it is characterized in that, first filter (7) and the second filter (8) are specular distribution relative to a plane D between the first filter (7) and the second filter (8), described plane D and main waveguide (5) axes normal.
9. according to the single hole compact waveguide directional filter in claim 1-4 described in any one, it is characterized in that, the axis that main waveguide (5) and complementary wave lead (6) is parallel to each other, the axis of the first filter (7) and the axis of the second filter (8) parallel to each other and all perpendicular to the axis of main waveguide (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310011531.6A CN103022603B (en) | 2013-01-14 | 2013-01-14 | Single hole compact waveguide directional filter |
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| CN201310011531.6A CN103022603B (en) | 2013-01-14 | 2013-01-14 | Single hole compact waveguide directional filter |
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| CN103022603A CN103022603A (en) | 2013-04-03 |
| CN103022603B true CN103022603B (en) | 2015-07-29 |
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| CN115911792B (en) * | 2023-02-27 | 2023-07-18 | 电子科技大学 | Double-zero terahertz waveguide filter based on concave resonant cavity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0920070A1 (en) * | 1997-11-25 | 1999-06-02 | Robert Bosch Gmbh | Directional filter |
| CN202487736U (en) * | 2012-03-15 | 2012-10-10 | 成都赛纳赛德科技有限公司 | Ridge waveguide directional coupler |
| CN102780058A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Rectangular waveguide directional coupler |
| CN202997016U (en) * | 2013-01-14 | 2013-06-12 | 成都赛纳赛德科技有限公司 | Single-hole compact waveguide directional filter |
-
2013
- 2013-01-14 CN CN201310011531.6A patent/CN103022603B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0920070A1 (en) * | 1997-11-25 | 1999-06-02 | Robert Bosch Gmbh | Directional filter |
| CN202487736U (en) * | 2012-03-15 | 2012-10-10 | 成都赛纳赛德科技有限公司 | Ridge waveguide directional coupler |
| CN102780058A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Rectangular waveguide directional coupler |
| CN202997016U (en) * | 2013-01-14 | 2013-06-12 | 成都赛纳赛德科技有限公司 | Single-hole compact waveguide directional filter |
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