CN109713415B - Microstrip high-isolation double-channel combiner - Google Patents
Microstrip high-isolation double-channel combiner Download PDFInfo
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- CN109713415B CN109713415B CN201811604670.9A CN201811604670A CN109713415B CN 109713415 B CN109713415 B CN 109713415B CN 201811604670 A CN201811604670 A CN 201811604670A CN 109713415 B CN109713415 B CN 109713415B
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Abstract
A microstrip high-isolation dual-channel combiner comprises a high-frequency band-pass filter, a high-frequency band harmonic filter, a low-frequency band low-pass filter, a power divider and a public end. The common end is connected with the output end of the high-frequency band harmonic wave suppressor and the input end of the low-frequency band filter at the same time, the high-frequency band-pass filter is connected with the power divider, the high-frequency band signal is divided into two parts and then connected with the high-frequency band harmonic wave filter in series, and then the two parts and the two low-frequency band low-pass filters are respectively combined into a combiner, so that the high-isolation double-channel combiner is formed. The invention adopts a microstrip structure, and high and low frequency bands respectively adopt capacitive coupling and inductive coupling by changing the signal synthesis mode of the common end of the combiner, thereby increasing the signal selectivity of each frequency band and improving the isolation of the combiner, thereby realizing the two-channel high-isolation combiner.
Description
Technical Field
The invention relates to the technical field of communication devices, in particular to a microstrip high-isolation dual-channel combiner.
Background
Microstrip combiner is widely used in communication industry, and its function is mainly to transmit different frequency signals through a common port via antenna, and both are required to complete their functions without mutual influence. The mutual influence among the signals is mainly caused by insufficient isolation among the signals, and the interference among the signals is smaller when the isolation is larger. With the development of technology and the need of services, the requirement of isolation between signals is relatively high, and the conventional isolation combiner cannot meet the requirement of the existing system. When the system needs a two-channel or more-channel combiner, a microstrip combiner is needed to meet the requirements of high isolation and two-channel or multi-channel.
Disclosure of Invention
The invention aims to provide a microstrip high-isolation dual-channel combiner aiming at the problems.
A microstrip high-isolation combiner comprises a high-frequency band-pass filter, a high-frequency band harmonic filter, a low-frequency band low-pass filter, a power divider and a public end, wherein the output end of the high-frequency band-pass filter is connected with the input end of the power divider, two output ends of the power divider are respectively connected with the high-frequency band harmonic filter and a load resistor, and the public end is simultaneously connected with the output end of the high-frequency band harmonic filter and the input end of the low-frequency band low-pass filter.
And the high-frequency band harmonic filter is connected with the public end in a capacitive coupling manner.
The low-frequency band low-pass filter is connected with the public end in an inductive coupling mode.
The length of the connecting microstrip line between the high-band harmonic filter and the common end and the length of the connecting microstrip line between the low-band low-pass filter and the common end are ¼ lambda of the high-low end frequency, wherein lambda is the wavelength of the corresponding frequency.
A microstrip high-isolation dual-channel combiner comprises two combiners consisting of a high-frequency band harmonic filter, a low-frequency band low-pass filter and a common end, wherein the two combiners share a high-frequency band-pass filter through a power divider; the output end of the high-frequency band-pass filter is connected with the input end of the power divider, and the two output ends of the power divider are respectively connected with the high-frequency band harmonic filter.
The output port of the power divider is provided with an isolation resistor for absorbing the reflected signals between the output ports, thereby enhancing the mutual isolation of the signals of the output ports.
The invention has the beneficial effects that: the invention adopts a microstrip structure, and can obviously improve the isolation of products and ensure that signals do not interfere with each other by changing the signal synthesis mode of the common end of the combiner and adding the design method of connecting high-frequency band-pass filters in series. The frequency range of each pass band can also be designed according to actual requirements.
Drawings
Fig. 1 is a structural diagram of a microstrip high-isolation dual-channel combiner;
FIG. 2 is a diagram of a high band bandpass filter;
FIG. 3 is a block diagram of a high band harmonic filter;
FIG. 4 is a diagram of a low band low pass filter;
FIG. 5 is a diagram of a power divider architecture;
FIG. 6 is a diagram of a common port structure;
in the figure, 1-high band pass filter, 2-high band harmonic filter, 3-low band low pass filter, 4-power divider, 5-common terminal, 6-isolation resistor.
Detailed Description
The utility model provides a microstrip high isolation combiner, includes high band pass filter (1), high band harmonic filter (2), low band low pass filter (3), merit and divides ware (4) and common port (5), and the merit is divided ware (4) input to high band pass filter (1) output connection, and two outputs of merit divide ware (4) to connect respectively high band harmonic filter (2) and load resistance, common port (5) are connected with high band harmonic filter (2) output and low band low pass filter (3) input simultaneously.
Furthermore, the high-band harmonic filter (2) is connected with the common terminal (5) by capacitive coupling.
Furthermore, the low-frequency band low-pass filter (3) and the common terminal (5) are connected by inductive coupling.
Furthermore, the lengths of the connecting microstrip lines between the high-band harmonic filter (2) and the low-band low-pass filter (3) and the common end (5) are ¼ lambda of the high-low end frequency, wherein lambda is the wavelength of the corresponding frequency.
A microstrip high-isolation dual-channel combiner comprises two combiners consisting of a high-band harmonic filter (2), a low-band low-pass filter (3) and a common end (5), wherein the two combiners share one high-band bandpass filter (1) through a power divider (4); the output end of the high-frequency band-pass filter (1) is connected with the input end of the power divider (4), and the two output ends of the power divider (4) are respectively connected with the high-frequency band harmonic filter (2).
Furthermore, an output port of the power divider (4) is provided with an isolation resistor (6) for absorbing the reflected signal between the output ports, thereby enhancing the isolation of the signal at the branch port of the power divider.
The invention adopts a microstrip structure, and improves the isolation of the combiner by changing the signal synthesis mode of the common end of the combiner, so that the signals are not interfered with each other. The frequency range of each pass band can also be designed according to actual requirements.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The microstrip high-isolation combiner is characterized by comprising a high-frequency band-pass filter (1), a high-frequency band harmonic filter (2), a low-frequency band low-pass filter (3), a power divider (4) and a common end (5), wherein the output end of the high-frequency band-pass filter (1) is connected with the input end of the power divider (4), one end of each of two output ends of the power divider (4) is connected with the high-frequency band harmonic filter (2), the other end of each output end of the power divider is connected with a load resistor, the common end (5) is connected with the output ends of the high-frequency band harmonic filter (2) and the low-frequency band low-pass filter (3) at the same time, the length of a connecting microstrip line between the high-frequency band harmonic filter (2), the low-frequency band low-pass filter (3) and the common end (5) is 35.
2. The microstrip high isolation combiner according to claim 1, wherein the high band harmonic filter (2) is connected to the common port (5) by capacitive coupling.
3. The microstrip high isolation combiner according to claim 1, wherein the low band low pass filter (3) is connected to the common port (5) by inductive coupling.
4. A microstrip high-isolation dual-channel combiner comprises two combiners consisting of a high-frequency band harmonic filter (2), a low-frequency band low-pass filter (3) and a common end (5), wherein the length of a connecting microstrip line between the high-frequency band harmonic filter (2), the low-frequency band low-pass filter (3) and the common end (5) is ¼ lambda of high-low end frequency of the connecting microstrip line, wherein lambda is the wavelength of corresponding frequency, and the two combiners share one high-frequency band pass filter (1) through a power divider (4); the output end of the high-frequency band-pass filter (1) is connected with the input end of the power divider (4), and the two output ends of the power divider (4) are respectively connected with the high-frequency band harmonic filter (2).
5. The microstrip high-isolation dual-channel combiner according to claim 4, wherein the output port of the power divider (4) has an isolation resistor (6) for absorbing the reflected signal between the output ports, thereby enhancing the isolation of the branch port signal of the power divider.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811604670.9A CN109713415B (en) | 2018-12-26 | 2018-12-26 | Microstrip high-isolation double-channel combiner |
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| CN201811604670.9A CN109713415B (en) | 2018-12-26 | 2018-12-26 | Microstrip high-isolation double-channel combiner |
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| CN109713415A CN109713415A (en) | 2019-05-03 |
| CN109713415B true CN109713415B (en) | 2020-05-22 |
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| CN201623245U (en) * | 2010-03-19 | 2010-11-03 | 北京东方信联科技有限公司 | Combiner |
| CN102354783A (en) * | 2011-08-02 | 2012-02-15 | 南京广顺网络通信设备有限公司 | Suspending microstrip structured high and low pass combiner |
| CN105390787A (en) * | 2015-12-16 | 2016-03-09 | 中国电子科技集团公司第四十一研究所 | Novel composite function gradient millimeter wave waveguide power distribution synthesizer |
| CN107492699A (en) * | 2016-06-12 | 2017-12-19 | 中兴通讯股份有限公司 | A kind of frequency combiner, design method and communicator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050012676A1 (en) * | 2003-07-16 | 2005-01-20 | Mccarthy Robert Daniel | N-port signal divider/combiner |
| US8395460B2 (en) * | 2010-01-12 | 2013-03-12 | Xg Technology, Inc. | Low loss RF transceiver combiner |
| CN103825075A (en) * | 2014-01-24 | 2014-05-28 | 张家港保税区国信通信有限公司 | T-shaped branch loading built-in antenna combiner |
| CN206098637U (en) * | 2016-08-31 | 2017-04-12 | 广东通宇通讯股份有限公司 | Broadband combiner |
| CN107317589A (en) * | 2017-06-16 | 2017-11-03 | 京信通信系统（中国）有限公司 | Micro-strip combiner and its radio circuit |
| CN207409639U (en) * | 2017-10-25 | 2018-05-25 | 上海安费诺永亿通讯电子有限公司 | A kind of three frequency four-port microstrip combiner of ultra wide band for mobile radio system |
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2018
- 2018-12-26 CN CN201811604670.9A patent/CN109713415B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623245U (en) * | 2010-03-19 | 2010-11-03 | 北京东方信联科技有限公司 | Combiner |
| CN102354783A (en) * | 2011-08-02 | 2012-02-15 | 南京广顺网络通信设备有限公司 | Suspending microstrip structured high and low pass combiner |
| CN105390787A (en) * | 2015-12-16 | 2016-03-09 | 中国电子科技集团公司第四十一研究所 | Novel composite function gradient millimeter wave waveguide power distribution synthesizer |
| CN107492699A (en) * | 2016-06-12 | 2017-12-19 | 中兴通讯股份有限公司 | A kind of frequency combiner, design method and communicator |
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| CN109713415A (en) | 2019-05-03 |
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