Dual-frequency duplexer provided with branchy pitch line loading matching network
A matching network and duplexer technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as the inability to guarantee the open circuit state of another group of resonators, and the difficulty in achieving the isolation effect of four channels, and achieve a wide range of applications , Small size, simple design process
Inactive Publication Date: 2014-11-12
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
With such a matching network, when one set of resonators is working, the other set of resonators cannot be guaranteed to be in an open state, so it is difficult to achieve a good isolation effect for all four channels
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[0036] The structural diagram of a dual-frequency duplexer using a multi-stub load matching network proposed by the present invention is as follows Figure 5 As shown, it is made on the double-sided copper-clad microstrip board in the form of a printed circuit board, and the same surface of the double-sided copper-clad microstrip board is respectively made with a signal input feeder port port1, a signal output feeder port port2, and a signal output port. The feeder port port3 (respectively corresponding to the marks 19, 20, 21 in the figure), the first channel filter 5, the second channel filter 6, the third channel filter 7, the fourth channel filter 8, the first short-circuit transmission line 1, The second short circuit transmission line 3, the first open circuit transmission line 2, the second open circuit transmission line 4, the first output feeder 9, the second output feeder 10, the third output feeder 11, the fourth output feeder 12, the double-sided copper-clad microst...
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The invention discloses a dual-frequency duplexer provided with a branchy pitch line loading matching network. The dual-frequency duplexer is implemented through a micro-strip line structure, and is manufactured on a micro-strip board with the double sides wrapped with copper in a printed circuit board mode. The dual-frequency duplexer comprises a signal input feeder port 1, a signal output feeder port 2, a signal output feeder port 3, four channel filters and the branchy pitch line loading matching network. The matching network is composed of two short-circuit transmission lines and two open-circuit transmission lines. According to the dual-frequency duplexer provided with the branchy pitch line loading matching network, when any set of resonators work, the other set of resonators are in an open-circuit state, and the inter-channel inhibition effect is improved. Meanwhile, the matching network is small in size and simple in design and can be designed according to a theoretical design formula, the length value and resistance value of the transmission lines can be changed, the application range is wide, and flexibility is high.
Description
technical field [0001] The present invention relates to the technical field of frequency division duplexing, in particular to a dual-frequency duplexer using multi-stub lines to load a matching network. Background technique [0002] Due to the rapid development of wireless communication technology and the increasing demand for wireless communication, 2G, 3G, and 4G networks coexist in the market today. Many wireless terminals, such as mobile phones, tablet computers, etc., are designed to be compatible with multiple communication standards. , which allows end users to enjoy services provided by different operators at the same time. [0003] The common FDD technology in the communication industry requires two communication channels: an uplink channel and a downlink channel. At this time, a duplexer must be used in the communication system. Traditional duplexers can only work on a set of uplink and downlink frequencies. For the market where multiple communication standards c...
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IPC IPC(8): H01P1/203
Inventor 陈付昌邱捷铭胡豪涛涂治红褚庆昕
Owner SOUTH CHINA UNIV OF TECH