CN103490124B - A kind of waveguide duplexer - Google Patents
A kind of waveguide duplexer Download PDFInfo
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- CN103490124B CN103490124B CN201310446043.8A CN201310446043A CN103490124B CN 103490124 B CN103490124 B CN 103490124B CN 201310446043 A CN201310446043 A CN 201310446043A CN 103490124 B CN103490124 B CN 103490124B
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Abstract
The present invention relates to a kind of waveguide duplexer, belong to electronic technology field.Waveguide duplexer of the present invention uses the spurious mode of resonator as non-transmitting node, the multipath effect be coupled with main mould and spurious mode by the coupling controlling main mould and main mould produces transmission zero outward at the band of path filter, thus improves the isolation of duplexer; Meanwhile, because the transmission zero implementation of the type does not need cross-couplings, the physical dimension of duplexer can be reduced, simplify processing and assembly technology.
Description
Technical field
The present invention relates to a kind of waveguide duplexer, belong to electronic technology field.
Background technology
Waveguide duplexer is the critical component of microwave system.Along with the development of communication system in recent years, also more and more higher to the requirement of duplexer, require the index meeting high isolation, filter with low insertion loss under the restriction of given size and interface requirement.The resonator number that Generalized Chebyshev protosype makes needs under satisfied same Out-of-band rejection condition less by introducing transmission zero, but how to realize transmission zero in Wave guide system be a difficult point, because the demand of specific topological form and coupling polarity often and the size of duplexer and interface requirement contradiction.This patent gives a kind of novel duplexer way of realization, does not need cross-couplings, produces transmission zero, efficiently solve this contradiction by the spurious mode of resonator.
Summary of the invention
The object of the invention is to propose a kind of waveguide duplexer.
The object of the invention is to be achieved through the following technical solutions.
A kind of waveguide duplexer of the present invention, comprises cavity and cover plate, and cover plate to cover on cavity and is fixedly connected with cavity;
Cavity comprises common port T-shaped knot and two path filters, and two path filters are distributed in the two ends of common port T-shaped knot respectively symmetrically; Two path filters are respectively left channel filter and right channel filter;
Left channel filter outwards comprises left side the first resonator, left side second resonator, left side the 3rd resonator and left side the 4th resonator successively from common port T-shaped knot;
Right channel filter outwards comprises right side the first resonator, right side second resonator, right side the 3rd resonator and right side the 4th resonator successively from common port T-shaped knot;
Described left side first resonator, left side the 4th resonator, right side first resonator and right side the 4th resonator are TE101 pattern rectangular waveguide resonator;
Described left side second resonator, left side the 3rd resonator, right side second resonator and right side the 3rd resonator are TE201 mode resonator, TE201 mode resonator uses TE201 pattern as main mould, use TE101 pattern as parasitic mode, TE101 spurious mode is as disresonance node; TE101 pattern in described TE101 pattern rectangular waveguide resonator is different from the frequency of the TE101 pattern as parasitic mode in TE201 mode resonator.
Beneficial effect
Waveguide duplexer of the present invention can not use cross-couplings to produce transmission zero at band far away;
The present invention can be widely applied in Radio-Frequency Wireless Communication system;
Waveguide duplexer of the present invention uses the spurious mode of resonator as non-transmitting node, the multipath effect be coupled with main mould and spurious mode by the coupling controlling main mould and main mould produces transmission zero outward at the band of path filter, thus improves the isolation of duplexer; Meanwhile, because the transmission zero implementation of the type does not need cross-couplings, the physical dimension of duplexer can be reduced, simplify processing and assembly technology.
Two path filters of duplexer use two TE201 mould resonators respectively, use the resonance frequency of its " low order mode " TE101 pattern as disresonance zero point, utilize the multipath coupling of disresonance generation at zero point, two transmission zeros are produced respectively at two passages, band far away for improving path filter suppresses, thus improves the mutual isolation of two passages.
The polarity of the coupling between the disresonance zero point controlling that filter cavity and its low order mode form by the position controlling filter coupled hole comes the position at controls transfer zero point, the high-end passage of duplexer is made to produce transmission zero at low side, otherwise, low side passage also produces two transmission zeros high-end, thus improves the isolation of duplexer.Owing to not using cross coupling structure, the overall structure of duplexer is a list structure, is convenient to processing and assembling.
Accompanying drawing explanation
Fig. 1 is the structural representation of duplexer cavity of the present invention;
Fig. 2 is duplexer collaborative simulation field model, adds for coordinately regulated lump port as seen from the figure in each resonator;
Fig. 3 is the final full-wave simulation result figure of duplexer, the physical dimension corresponding to the ideal response using synergy emulation method can obtain duplexer fast by alternative manner as seen by simulation result.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
A kind of waveguide duplexer, comprises cavity and cover plate, and cover plate to cover on cavity and is fixedly connected with cavity;
As shown in Figure 1, cavity comprises common port T-shaped knot 1 and two path filters, and two path filters are distributed in the two ends of common port T-shaped knot 1 respectively symmetrically; Two path filters are respectively left channel filter and right channel filter;
Left channel filter outwards comprises left side the first resonator 2, left side second resonator 3, left side the 3rd resonator 4 and left side the 4th resonator 5 successively from common port T-shaped knot 1;
Right channel filter outwards comprises right side the first resonator 2 ', right side second resonator 3 ', right side the 3rd resonator 4 ' and right side the 4th resonator 5 ' successively from common port T-shaped knot 1;
Described left side first resonator 2, left side the 4th resonator 5, right side first resonator 2 ' and right side the 4th resonator 5 ' are TE101 pattern rectangular waveguide resonator;
Described left side second resonator 3, left side the 3rd resonator 4, right side second resonator 3 ' and right side the 3rd resonator 4 ' are TE201 mode resonator, TE201 mode resonator uses TE201 pattern as main mould, use TE101 pattern as parasitic mode, TE101 spurious mode is as disresonance node.
By the coupling window M1 (between left side second resonator 3 with left side the 3rd resonator 4) between control resonator and the transmission zero location of M2 (between left side the 3rd resonator 4 with left side the 4th resonator 5) and M1 ' (between right side second resonator 3 ' with right side the 3rd resonator 4 ') with M2 ' (between right side the 3rd resonator 4 ' with right side the 4th resonator 5 ') relative position (whether M1 and M2, M1 ' overlap with M2 ' window center line) control channel filter.The ratio be coupled with between main mould and spurious mode that is coupled that can to control main mould and main mould between adjacent resonators in different positions (distance between coupling window M1 and M2, M1 ' with M2 ' center line) opened by the window of resonator, thus the distance of controls transfer zero distance passband.
Collaborative simulation is used to determine coupling window size and waveguide length.
1) in the full-wave electromagnetic field simulation model of duplexer, add the lump port consistent with direction of an electric field in the position that each resonator electric field is maximum, carry out full-wave electromagnetic field emulation.
2) the 11 port simulation results be made up of three ripple ports and 8 lump ports of duplexer are obtained after having emulated, then circuits cascading emulation is used, by adding lumped capacity between 8 lump port end and two ports, the numerical value of these lumped capacities is regulated to make the simulation result of duplexer reach the response results of desirable duplexer.
3) judged the deviation of coupling window size and ideal dimensions by the size of control capacittance, then revise the length of the size resonator of coupling window in field model.Then again by step 1) next round simulation and optimization design, until the simulation result of full-wave electromagnetic field model reaches desirable response results.
For the duplexer of this type, owing to using the resonator of different mode, traditional simulating analysis cannot coupling between simple computation resonator, except input and output waveguide port, a lump port is added in the position that the electric field of each resonator is maximum, then in the simulation model of road, collaborative simulation is carried out to this N port circuit model, coupling corresponding in full-wave electromagnetic field model is judged by the size of tuning capacitance, whether the physical size corresponding to frequency is suitable, how to revise, then according to the emulation re-starting revised electromagnetic field model, so only need little several circulation just can find the diplexer structure size meeting index request, full-wave simulation model as shown in Figure 2, final simulation result as shown in Figure 3, wherein S11 (return loss) represents that energy is reflected back the energy of port one when port one inputs, S21 (insertion loss) represents that port one is transferred to the energy of port 2, S31 (insertion loss) represents that port one is transferred to the energy of port 3.
Claims (1)
1. a waveguide duplexer, is characterized in that: comprise cavity and cover plate, and cover plate to cover on cavity and is fixedly connected with cavity;
Cavity comprises common port T-shaped knot and two path filters, and two path filters are distributed in the two ends of common port T-shaped knot respectively symmetrically; Two path filters are respectively left channel filter and right channel filter;
Left channel filter outwards comprises left side the first resonator, left side second resonator, left side the 3rd resonator and left side the 4th resonator successively from common port T-shaped knot;
Right channel filter outwards comprises right side the first resonator, right side second resonator, right side the 3rd resonator and right side the 4th resonator successively from common port T-shaped knot;
Described left side first resonator, left side the 4th resonator, right side first resonator and right side the 4th resonator are TE101 pattern rectangular waveguide resonator;
Described left side second resonator, left side the 3rd resonator, right side second resonator and right side the 3rd resonator are TE201 mode resonator, TE201 mode resonator uses TE201 pattern as main mould, use TE101 pattern as parasitic mode, TE101 spurious mode is as disresonance node; TE101 pattern in TE101 pattern rectangular waveguide resonator is different from the frequency of the TE101 pattern as parasitic mode in TE201 mode resonator;
By controlling the transmission zero location of coupling window M1 and M2 between resonator and M1 ' and M2 ' relative position control channel filter; The ratio be coupled with between main mould and spurious mode that is coupled of main mould and main mould between different Position Control adjacent resonators opened by the window of resonator, thus the distance of controls transfer zero distance passband;
Described coupling window M1 refers to the coupling window between left side the second resonator and left side the 3rd resonator, described coupling window M2 refers to the coupling window between left side the 3rd resonator and left side the 4th resonator, described coupling window M1 ' refers to the coupling window between right side the second resonator and right side the 3rd resonator, and described coupling window M2 ' refers to the coupling window between right side the 3rd resonator and right side the 4th resonator.
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| CN201310446043.8A CN103490124B (en) | 2013-09-26 | 2013-09-26 | A kind of waveguide duplexer |
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| CN106785270B (en) * | 2016-12-29 | 2019-06-18 | 西安空间无线电技术研究所 | A kind of microwave complementation duplexer |
| CN106898849B (en) * | 2017-04-25 | 2021-01-19 | 四川省韬光通信有限公司 | Dielectric waveguide filter with cross coupling structure |
Citations (2)
| 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 |
| CN102709630A (en) * | 2011-06-02 | 2012-10-03 | 无锡波联电科技有限公司 | Filter of satellite communication earth station receiver |
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| GB0202660D0 (en) * | 2002-02-06 | 2002-03-20 | Quasar Microwave Tech | Waveguide monitoring arrangement |
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Patent Citations (2)
| 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 |
| CN102709630A (en) * | 2011-06-02 | 2012-10-03 | 无锡波联电科技有限公司 | Filter of satellite communication earth station receiver |
Non-Patent Citations (1)
| Title |
|---|
| 多模双工器技术;高秀晓;《中国优秀硕士学位论文全文数据库》;20110315;第4-23页 * |
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