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Low passive intermodulation feed source duplexer, and receiving and emitting method thereof

A duplexer and feed technology, applied in the field of microwave filters and antennas, to achieve the effects of reducing PIM, reducing the use of cables and connectors, and reducing nonlinearity

Active Publication Date: 2018-07-24
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

For communication systems with a frequency of 300MHz to 4000MHz, the use of coaxial RF connectors and coaxial cables to connect microwave components is the most common method. The problem is prominent in the system

Method used

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  • Low passive intermodulation feed source duplexer, and receiving and emitting method thereof
  • Low passive intermodulation feed source duplexer, and receiving and emitting method thereof
  • Low passive intermodulation feed source duplexer, and receiving and emitting method thereof

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as figure 1 As shown, the low passive intermodulation feed duplexer of the present invention includes: a duplexer cavity (1), a spiral feed cup (2), a public resonant rod (3), a spiral antenna feed (4) , duplexer cover (5) and antenna dielectric support (6);

[0039] The signal is fed into the helical feed composed of the helical feed cup (2) and the helical antenna feed (4) supported by the antenna dielectric support (6) to realize signal reception and transmission;

[0040] Such as figure 2As shown, the diplexer cavity (1) is equipped with a transmitting channel and a receiving channel to filter the signal, wherein the transmitting channel is a fourth-order generalized Chebyshev filter with a zero point, and the receiving channel is a fifth-order generalized Chebyshev filter The coupling matrix of the filter is the s...

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Abstract

The invention provides a low passive intermodulation feed source duplexer, and a receiving and emitting method thereof. A duplexer cavity body and an antenna feed source base are designed and processed in an integral manner in terms of structures, the sizes of the duplexer and the antenna feed source can be accurately calculated. A shared resonance rod of the duplexer and inner and outer conductors at a feed source input interface can be co-designed in that a matching port impedance can be designed, the shape, size and distance of the shared resonance rod can be adjusted, and the phase position between two devices can be optimized. Accordingly, an integral design can be realized. The invention is advantageous in that the situation of the conventional design that the duplexer is connected to the antenna feed source through cables can be prevented, and the usage of electric connectors can be reduced, and the part depending on elastic connection can be removed; the contact nonlinearity ofsensitive parts can be prevented, and the PIM feature of the product can be greatly improved, and the aim of reducing the PIM of the system can be achieved; the problem of passive intermodulation inhibition of the microwave duplexer and the antenna feed source system can be resolved.

Description

technical field [0001] The invention relates to a low passive intermodulation feed source duplexer and a method for receiving and transmitting the same, belonging to the field of microwave filters and antennas. Background technique [0002] With the development of satellite communication technology, more and more high-power passive devices are used. Among them, transceiver duplexers and antenna feeds are indispensable devices. ) performance requirements are getting higher and higher. Passive intermodulation refers to the interference signal generated when two or more transmitting carriers pass through passive components, which will reduce the signal-to-noise ratio of the receiving system, increase the bit error rate, affect the normal operation of the entire communication system, and cause channel failure in severe cases. Congestion, the interruption of communication, paralyzes the system. This kind of hazard often occurs in components such as transceiver duplexers and ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/207H01Q1/36H01Q1/50
CPCH01P1/207H01Q1/36H01Q1/50
Inventor 殷新社吕庆立秦楚崔兆云李欣王勇夏亚峰李亚峰冯宇宁樊田王栋
Owner XIAN INSTITUE OF SPACE RADIO TECH
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