CN106848516B - Wide stop band microstrip triplexer based on cross-shaped resonator - Google Patents
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Abstract
The invention discloses a wide-stopband microstrip triplexer based on a cross-shaped resonator, which comprises an input port, a first output port, a second output port, a third output port, a cross-shaped resonator, a first, a second, a third and a fourth circuit resonators, a first short-circuit resonator and a second short-circuit resonator; the cross-shaped resonator can generate resonance at three different frequencies, and the three frequencies correspond to three channels which are respectively a first channel, a second channel and a third channel; the first channel consists of an input port, a cross-shaped resonator, a first short-circuit resonator, a second short-circuit resonator and a first output port which are sequentially coupled; the second channel consists of an input port, a cross-shaped resonator, a first open-circuit resonator, a second open-circuit resonator and a second output port which are sequentially coupled; the third channel is composed of an input port, a cross-shaped resonator, a third and fourth circuit resonators and a third output port which are sequentially coupled. The invention can realize good filtering characteristic and wide stop band characteristic.
Description
Technical Field
The invention relates to the technical field of high-frequency devices, in particular to a wide-stop-band microstrip triplexer based on a cross resonator.
Background
Due to the rapid development of wireless communication in recent years, the popularity of 4G technology, the fire and heat of the internet of things, and the arrival of 5G all mark a peak period that wireless technology will be rapidly developed. Today's wireless communication systems are basically multiplexing systems, and for time division duplex, the problem can be solved by arranging the receiving and transmitting at different time slices, and for frequency division multiplexing, in order to reduce the number of antennas and thus save the cost, special devices are needed to be designed to make the electromagnetic waves of different frequencies share one antenna without causing interference, and such devices are multiplexers. With the development of communication technology, the performance requirements of wireless communication for multiplexers are also higher and higher, and miniaturization, wide stop band, high isolation, low cost and easy design all become one of the criteria for evaluating the performance of a multiplexer.
The multiplexer is generally composed of a matching network and a plurality of bandpass filters. The band pass filter realizes frequency selection, and the matching network realizes matching of each channel and a port and isolation between the channels. Taking a triplexer as an example, if each channel of the triplexer is a third-order chebyshev bandpass response, a matching network plus 9 resonators is typically required, which makes the triplexer larger in size and increases the production cost. And through making three band-pass filter share a three mode resonator, can reduce two syntonizers to sharing syntonizer can also realize the function of matching network, the size that like this triplexer will be can great reduction, and the application face will also be wider.
The prior art is investigated and known, and the details are as follows:
in 2006, Chi-Feng Chen et al published on IEEE TREASYTION AND MICROWAVE THEORYAND TECHNIQUES entitled "Microstrip Diplexers Design With Common resonator section for Compact Size, But used a stepped impedance resonator as a Common resonator to connect two bandpass filters of open-ended resonator structure to form a duplexer.
In 2006, Chi-Feng Chen et al published on "Asia-Pacific Microwave Conference" under the title "A miniature Microwave Common Resonator Triplexer with out ExtraMatching Network", using a three-mode ladder impedance Resonator, connecting three band-pass filters to form a Triplexer, but the high frequency suppression of this structure was not very good.
In 2011 Ming-Lin Chuang et al published under the heading "IEEE MICROWAVE AND WIRELESS COMPONENTSLETTERS" entitled "Microtrip Diplexer Design Using Common T-ShapedResonator" and used a T-type Common resonator to connect two band pass filters to form a duplexer. The stop band of the structure is not wide enough and the mentioned T-shaped resonator can only be shared by two channels.
Generally, the design of the multiplexer formed by combining the band-pass filters is mature at present, along with the development of modern portable wireless electronic products, the miniaturization, the low cost and the high frequency formation are the targets of the research of the duplexer, and the microstrip multiplexer can just meet the requirements. In terms of miniaturization, researchers in various countries have done a lot of work, and one of them is to use a common resonator. However, most of the research is done based on the duplexer, and there are few multiplexers, good stop band characteristics, simple and compact structure.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a wide-stop-band microstrip triplexer based on a cross-shaped resonator, which can realize good filtering characteristics and wide-stop-band characteristics and has the advantages of flexible design, small volume, low cost, wide stop band and the like.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a wide stopband microstrip triplexer based on a cross-shaped resonator comprises an input port, a first output port, a second output port, a third output port, the cross-shaped resonator, a first, a second, a third and a fourth branch resonators with half wavelength, and a first and a second short circuit resonators with quarter wavelength; the cross-shaped resonator can generate resonance at three different frequencies, the three frequencies correspond to three channels which are respectively a first channel, a second channel and a third channel, the three channels share the same input port and the cross-shaped resonator, the central frequencies of the three channels can be adjusted by adjusting the lengths of a short circuit section line and an open circuit section line of the cross-shaped resonator, the first channel consists of an input port, a cross resonator, a first short-circuit resonator, a second short-circuit resonator and a first output port which are sequentially coupled, the second channel consists of an input port, a cross resonator, a first open-circuit resonator, a second open-circuit resonator and a second output port which are sequentially coupled, the third channel is composed of an input port, a cross resonator, a third open-circuit resonator, a fourth open-circuit resonator and a third output port which are sequentially coupled.
The first short-circuit resonator, the third open-circuit resonator and the fourth open-circuit resonator are all reduced in size by adopting bending structures.
And the feed lines of the cross resonator, the first short-circuit resonator, the second short-circuit resonator and the first output port are all provided with grounding through holes which are short-circuit ends.
The first short-circuit resonator and the second short-circuit resonator work at 1.57GHz, the first open-circuit resonator and the second open-circuit resonator work at 2.4GHz, the third open-circuit resonator and the fourth open-circuit resonator work at 3.5GHz, and each channel is three-order Chebyshev response.
The input port, the second output port and the third output port adopt a double-finger coupling structure.
The input port, the first output port, the second output port and the third output port are all impedance matching of 50 ohms.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. by introducing the shared cross-shaped resonator, the number of resonators is reduced while good filtering performance is realized, the design of a matching network is avoided, the size is effectively reduced, the design period is shortened, and the structure is easier to apply.
2. Through the mixed use of the cross-shaped resonator and the various types of resonators, the high-order modes of the cross-shaped resonator and the various types of resonators are staggered under the condition that the resonance frequency of the basic modes of the cross-shaped resonator and the various types of resonators is the same, so that the characteristic of a wide stop band can be realized, and the suppression of high-frequency noise can be well realized in practical application.
3. The wide-stopband microstrip triplexer has the characteristics of low insertion loss, good out-of-band selectivity and good filtering characteristic.
4. The wide-stopband microstrip triplexer has a microstrip structure, is light in weight and low in cost, and is suitable for industrial mass production, so that the duplexer has the advantages of simple structure, easiness in design and low manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of the wide stopband microstrip triplexer of the present invention.
Fig. 2 is a scattering parameter simulation result of the wide stop band microstrip triplexer of the present invention.
Fig. 3 is a parameter simulation result of the isolation strip of the wide stop band microstrip triplexer of the present invention.
Fig. 4 is a simulation result of the stop band characteristic of the wide stop band microstrip triplexer of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The wide stopband microstrip triplexer provided by the embodiment is mainly based on the cross-shaped resonator, so that the cross-shaped resonator resonates at three different frequencies respectively, and the cross-shaped resonator is shared by three passbands. The other resonators for each pass band can be selected and designed on their own.
Referring to fig. 1, the wide stopband microstrip triplexer of the present embodiment is fabricated on a double-sided copper-clad microstrip board 1 in a manner of a printed circuit board, and the other side of the microstrip board is a copper-clad ground plate. The wide stopband microstrip triplexer of the embodiment comprises an input Port1, a first output Port4, a second output Port3, a third output Port2, a cross-shaped resonator 2, first, second, third and fourth circuit resonators 10, 12, 14 and 15 with half wavelength, and first and second short circuit resonators 4 and 5 with quarter wavelength; the cross-shaped resonator 2 can generate resonance at three different frequencies, the three frequencies correspond to three channels which are respectively a first channel, a second channel and a third channel, the three channels share the same input Port1 and the cross-shaped resonator 2, the central frequencies of the three channels can be adjusted by adjusting the lengths of a short-circuit stub 18 and an open-circuit stub 13 of the cross-shaped resonator 2, the first channel is composed of an input Port1, a cross-shaped resonator 2, a first short-circuit resonator 4, a second short-circuit resonator 5 and a first output Port4 which are sequentially coupled, the second channel is composed of an input Port1, a cross-shaped resonator 2, a first open-circuit resonator 10, a second open-circuit resonator 12 and a second output Port3 which are sequentially coupled, and the third channel is composed of an input Port1, a cross-shaped resonator 2, a third open-circuit resonator 14, a first open-circuit resonator 1 and a, Fourth resonator 15, and third output Port 2. The first short-circuit resonator 4 and the second short-circuit resonator 5 work at 1.57GHz, the first open-circuit resonator 10 and the second open-circuit resonator 12 work at 2.4GHz, the third open-circuit resonator 14 and the fourth open-circuit resonator 15 work at 3.5GHz, and each channel is three-order Chebyshev response. In order to make the structure more compact in design, the first short-circuit resonator 4, the third open-circuit resonator 14, and the fourth short-circuit resonator 15 are bent as appropriate. The four ports 1, 2, 3 and 4 are all impedance matching of 50 ohms, so that a feeder line with enough length is reserved for the ports to facilitate welding of the SMA heads, in the figure, the Port feeder lines are 7, 9, 16 and 17, and the input Port1, the second output Port3 and the third output Port2 adopt a double-finger coupling structure to obtain stronger end coupling. 3. 6, 8 and 11 are grounding through holes which need to be connected with a copper-clad grounding plate by soldering tin and are short-circuit ends.
Referring to fig. 2, a simulation result of scattering parameters of the wide stop band microstrip triplexer of the present embodiment is shown, wherein the center frequencies are 1.57Ghz, 2.4Ghz, and 3.5Ghz, respectively. The horizontal axis represents the signal frequency of the wide stopband microstrip triplexer, and the vertical axis represents the amplitude, including the amplitude of the insertion loss (S12, S13) and the amplitude of the return loss S11, where S11 represents the return loss of port1, and S21, S31, S41 represent the insertion loss of port1 and port3, and port4, respectively. The insertion loss represents the relationship between the input power of one signal and the output power of the other port signal, and its corresponding mathematical function is: output power/input power (dB) ═ 20 × log | S21 |. The return loss represents the relationship between the input power of the port signal and the reflected power of the signal, and its corresponding mathematical function is as follows: the reflected power/incident power is 20 × log | S11 |. In this embodiment, the return loss may reach more than 15dB, the center frequency of the first channel is 1.57GHz, the relative bandwidth is 7%, the insertion loss is 1.81dB, the center frequency of the second channel is 2.4GHz, the relative bandwidth is 10.8%, the insertion loss is 1.06dB, the center frequency of the third channel is 3.5GHz, the relative bandwidth is 5.4%, and the insertion loss is 1.9 dB.
Referring to fig. 3, showing the parameter simulation result of the isolation strip of the wide stopband microstrip triplexer of the present embodiment, in the range of 1 to 4.5GHz, the absolute value of S32 reaches more than 50dB, the absolute value of S42 reaches more than 34dB, and the absolute value of S43 reaches more than 40 dB.
Referring to fig. 4, the stop band characteristic of the wide stop band microstrip triplexer of the present embodiment is shown, and it can be seen from the figure that the 20dB stop band can reach more than 6 times of the fundamental frequency, and there is still further room for improvement by further optimizing the resonator structure.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a wide stopband microstrip triplexer based on cross resonator which characterized in that: the double-frequency-modulation-type three-phase resonant cavity comprises an input port, a first output port, a second output port, a third output port, a cross-shaped resonator, a first, a second, a third and a fourth circuit resonators with half wavelength, and a first and a second short-circuit resonators with quarter wavelength; the cross-shaped resonator can generate resonance at three different frequencies, the three frequencies correspond to three channels which are respectively a first channel, a second channel and a third channel, the three channels share the same input port and the cross-shaped resonator, the central frequencies of the three channels can be adjusted by adjusting the lengths of a short circuit section line and an open circuit section line of the cross-shaped resonator, the first channel consists of an input port, a cross resonator, a first short-circuit resonator, a second short-circuit resonator and a first output port which are sequentially coupled, the second channel consists of an input port, a cross resonator, a first open-circuit resonator, a second open-circuit resonator and a second output port which are sequentially coupled, the third channel consists of an input port, a cross resonator, a third open-circuit resonator, a fourth open-circuit resonator and a third output port which are sequentially coupled; grounding through holes are formed in the feed lines of the cross resonator, the first short-circuit resonator, the second short-circuit resonator and the first output port and are short-circuit ends, and the grounding through holes in the resonators and the feed lines are formed in the end portions.
2. The wide stopband microstrip triplexer based on a cross-shaped resonator of claim 1, wherein: the first short-circuit resonator, the third open-circuit resonator and the fourth open-circuit resonator are all reduced in size by adopting bending structures.
3. The wide stopband microstrip triplexer based on a cross-shaped resonator of claim 1, wherein: the first short-circuit resonator and the second short-circuit resonator work at 1.57GHz, the first open-circuit resonator and the second open-circuit resonator work at 2.4GHz, the third open-circuit resonator and the fourth open-circuit resonator work at 3.5GHz, and each channel is three-order Chebyshev response.
4. The wide stopband microstrip triplexer based on a cross-shaped resonator of claim 1, wherein: the input port, the second output port and the third output port adopt a double-finger coupling structure.
5. The wide stopband microstrip triplexer based on a cross-shaped resonator of claim 1, wherein: the input port, the first output port, the second output port and the third output port are all impedance matching of 50 ohms.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178319A (en) * | 2013-03-26 | 2013-06-26 | 华南理工大学 | Interdigital coupling duplexer |
| CN203166051U (en) * | 2012-12-21 | 2013-08-28 | 京信通信系统（中国）有限公司 | Microstrip triplexer |
| CN103311613A (en) * | 2013-05-22 | 2013-09-18 | 南京航空航天大学 | Matching network-free common-mode rejection balancing micro-strip duplexer |
| CN203983429U (en) * | 2014-06-20 | 2014-12-03 | 华南理工大学 | The band pass filter that a kind of wide stopband suppresses |
| CN104577268A (en) * | 2015-01-04 | 2015-04-29 | 华南理工大学 | Planar lowpass-bandpass triplexer |
| CN206422201U (en) * | 2017-01-09 | 2017-08-18 | 华南理工大学 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203166051U (en) * | 2012-12-21 | 2013-08-28 | 京信通信系统（中国）有限公司 | Microstrip triplexer |
| CN103178319A (en) * | 2013-03-26 | 2013-06-26 | 华南理工大学 | Interdigital coupling duplexer |
| CN103311613A (en) * | 2013-05-22 | 2013-09-18 | 南京航空航天大学 | Matching network-free common-mode rejection balancing micro-strip duplexer |
| CN203983429U (en) * | 2014-06-20 | 2014-12-03 | 华南理工大学 | The band pass filter that a kind of wide stopband suppresses |
| CN104577268A (en) * | 2015-01-04 | 2015-04-29 | 华南理工大学 | Planar lowpass-bandpass triplexer |
| CN206422201U (en) * | 2017-01-09 | 2017-08-18 | 华南理工大学 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
Non-Patent Citations (1)
| Title |
|---|
| "基于十字形谐振器的小型四频滤波器设计";李润铄等;《中国科技论文》;20141015;第9卷(第10期);第1页左栏倒数第1-5行至右栏第1-6行、第2页左栏第19-25行及图1-图4 * |
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