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High-isolation duplexer with coupled electromagnetic shunt

A high-isolation, duplexer technology, applied in the direction of circuits, electrical components, waveguide devices, etc., can solve the problems of large circuit size and complex structure of duplexers, and achieve simple structure, enhanced frequency selectivity and out-of-band The effect of inhibition

Active Publication Date: 2015-06-03
江苏能电科技有限公司
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-isolation duplexer design scheme and solve the problems of large circuit size and complex structure of existing duplexers

Method used

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  • High-isolation duplexer with coupled electromagnetic shunt
  • High-isolation duplexer with coupled electromagnetic shunt
  • High-isolation duplexer with coupled electromagnetic shunt

Examples

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Embodiment 1

[0028] refer to figure 1 , this embodiment includes: a dielectric substrate 1 , three ports, that is, a first port 4 , a second port 5 and a common port 6 . The front side of the dielectric substrate is provided with a metal microstrip structure 2, and the metal plating layer on the back side is a grounding plate 3 of the metal microstrip patch. The dielectric constant of the dielectric substrate 1 is 10.2, and the thickness of the dielectric substrate 1 is 1.27 mm.

[0029] The metal microstrip structure 2 is divided into left and right parts with the same shape and different sizes around the common port 6 to form two symmetrically structured filters with different frequencies. Each filter is composed of an isosceles right triangle microstrip ring 7 with an open top, a curved microstrip line segment 8, and a broken line microstrip line segment 9 surrounded by the bottom edge of the isosceles right triangle and the outer sides of the lower half of the two waists; etc. A magn...

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Abstract

The invention discloses a high-isolation duplexer based on a coupled electromagnetic shunt. The high-isolation duplexer mainly solves the problem that an existing duplexer is large in volume and complex in structure and design. The high-isolation duplexer comprises a medium substrate and three ports, wherein a metal conduction band structure (2) is arranged on the front surface of the medium substrate, and an earth plate (3) is arranged on the back surface of the medium substrate; the ports are respectively connected with the metal conduction band structure; the metal conduction band structure is divided into a left part and a right part which are in the same shape and have different sizes, and two wave filters with different frequencies in the symmetrical structure are formed; each wave filter consists of an isosceles right-angled triangle micro-strip ring (7) with an open top, a curved micro-strip line section (8) and a broken line micro-strip line section (9) surrounding the lower part of a triangle; a magnetic coupling through hole (10) is formed in the middle position of the bottom edge of the triangle, an electric coupling opening (11) is formed in the middle of the broken line micro-strip line section (9), and two transmission zeros of each wave filter are respectively controlled by electric coupling and magnetic coupling. The high-isolation duplexer disclosed by the invention is high in isolation and simple in structure, and can be used for a small-scale radio frequency communication system.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to a novel miniaturized duplexer with a channel isolation amplitude above 40 dB, which can be used in miniaturized radio frequency communication systems. Background technique [0002] In a wireless communication system, a radio frequency transceiver and an antenna are connected together to complete the processing tasks of receiving and sending signals. If one antenna is configured for the receiver and the transmitter, it will not only increase the size and cost of the circuit, but also cause mutual interference between the two antennas, which will reduce the stability and reliability of the system. A duplexer allows transceivers to share an antenna without interfering with each other. [0003] Duplexers include transceiver switches and frequency band duplexers. If the transceivers use the same frequency band, the duplexer is equivalent to a transceiver switch. When the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
Inventor 肖建康李勇朱敏白小平
Owner 江苏能电科技有限公司
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