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Small MIMO system based on novel composite right-left hand (CRLH) transmission line technology

A technology of left and right hands and transmission lines, applied in the field of miniaturized MIMO systems, can solve the problems of narrow working bandwidth and large size, and achieve the effects of small size, high decoupling quality and efficiency, and low loss

Active Publication Date: 2015-03-04
许河秀
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Problems solved by technology

[0006] The present invention aims to solve the technical problem of narrow working bandwidth and large size of the existing ring bridge and its applied system, and provides a broadband ring bridge with wide working bandwidth and small size and a broadband miniaturization with weak inter-unit coupling MIMO system

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  • Small MIMO system based on novel composite right-left hand (CRLH) transmission line technology
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  • Small MIMO system based on novel composite right-left hand (CRLH) transmission line technology

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Embodiment Construction

[0039] Referring to the accompanying drawings, the present invention will be further described in detail with specific embodiments.

[0040] Such as Figure 4 and Figure 5 As shown, the new compact artificial composite right / left-handed transmission line (Composite Right / Left-handed Transmission Lines) based on microstrip technology, referred to as the CRLH unit, is an enhanced sawtooth capacitor structure based on fractal geometry, that is, the Wunderlich sawtooth capacitor (WDC) and complementary Spiral ring resonator synthesis. Specifically, single-layer microstrip printed circuit board technology is used to etch three-ring complementary spiral grooves on the microstrip ground plane 20 of the microstrip board, also known as complementary spiral ring resonators (CSRs). A Wunderlich sawtooth capacitor WDC based on Wunderlich fractal geometry, which is connected to the microstrip conduction layer 30 through a connection line, is arranged above the spiral groove, which is th...

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Abstract

The invention relates to a wide-frequency rat-race coupler based on novel composite right-left hand (CRLH) transmission line technology and a small MIMO system based on the rat-race coupler, so as to solve the technical problems that the prior rat-race coupler and the applied system are narrow in working bandwidth and large in size. The MIMO system is provided with a wide-frequency rat-race coupler; the wide-frequency rat-race coupler comprises three CRLH unit groups, that is, a first CRLH unit group, a second CRLH unit group and a third CRLH unit group; each group is formed by two CRLH units in connection to form a head end and a tail end; and each adjacent head end and the tail end of each group are connected to form a signal transmission port. The rat-race coupler of the invention can be widely applied to a Bulter matrix feed network, a microwave power synthesis and decomposition network, a sum-difference device, an isolator, a beam-adjustable antenna, an input / output system, any microstrip antenna array in need of decoupling and a multi-channel communication system.

Description

technical field [0001] The invention relates to a ring electric bridge and a MIMO system, in particular to a broadband ring electric bridge based on a novel composite left and right hand transmission technology and a miniaturized MIMO system based on the ring electric bridge. Background technique [0002] Ring bridge (rat-race coupler), also known as squirrel cage coupler or 180° hybrid ring, is an important component of summator, microwave power synthesis, centimeter and multiple input and output system (MIMO) decoupling network, and is extremely useful widely. [0003] as in the accompanying drawings figure 1 The circuit topology diagram of the existing ring bridge shown, at the operating frequency point, it consists of three phases of -90°, and the impedance is The transmission line (TL) branch and a section with a phase of -270° and an impedance of consists of transmission line branches. When used as a power divider, the signal is input from the port port1, the por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P3/18H01P5/16H01Q25/04
Inventor 许河秀王光明
Owner 许河秀
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