Passive intermodulation screening device for receiving and transmitting shared feed source inserting core

Abstract

The invention relates to a passive intermodulation screening device for a receiving and transmitting shared feed source inserting core, which comprises a low passive intermodulation reflecting plate,an integrated monopole, a titanium screw, an inserting core, a socket and a base, and is characterized in that the diameter of the low passive intermodulation reflecting plate is greater than a wavelength of the lowest operating frequency, a radiation probe hole and a mounting hole are designed, the radiation probe hole is used for radiation of the integrated monopole, and the mounting hole is used for titanium screw connection between the low passive intermodulation reflecting plate and the inserting core; the top of the low passive intermodulation reflecting plate is further designed with raised matching rings, the bottom of the low passive intermodulation reflecting plate is cylindrical and connected with one side of the base through screws so as to form a resonant cavity; a flange surface of the socket is connected with one side of the base through screws; the inserting core penetrates through a center hole of the base, and an inserting core mounting interface of the low passive intermodulation reflecting plate is matched with an interface of the inserting core; and the integrated monopole is of a cylindrical structure with the cross section being rectangular, the length of themonopole is greater than the 1 / 2 wavelength of the operating frequency, and the integrated monopole is integrally molded with the base.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a passive intermodulation screening device for a common feed ferrule for transmitting and receiving. Background technique [0002] Low passive intermodulation technology is one of the key technologies of communication systems, and it is also a technical problem of common concern in the industry today. The communication system is constantly developing in the direction of high-power transmission and high-sensitivity reception, and the size of the required antenna is getting larger and larger. Due to size constraints, a common antenna for transmitting and receiving must be used in many occasions. The problem of passive intermodulation has become a problem that restricts the development of high-power antennas. bottleneck. As a time-varying nonlinear phenomenon, passive intermodulation between transceivers is affected by many factors. The passive intermodulation performance of spacebo...

AI Technical Summary

Problems solved by technology

The communication system is constantly developing in the direction of high-power transmission and high-sensitivity reception, and the size of the required antenna is getting larger and larger. Due to size constraints, a common antenna for transmitting and receiving must be used in many occasions. The problem of passive intermodulation has become a problem that restricts the development of high-power antennas. bottleneck

As a time-varying nonlinear phenomenon, passive intermodulation between transceivers is affected by many factors. The passive intermodulation performance of spaceborne products is closely related to multiple factors such as passive intermodulation order, carrier power, material structure, installation connection, and space environment. Related, since there is no effective quantitative analysis method at present, the passive intermodulation performance of the product still needs to be verified by testing

[0003] Mobile communication satellites use large-diameter antennas, and array feeds are used for transmission and reception. The feeds have high power and a large number. Passive intermodulation of feeds has become a bottleneck restricting satellite development and an unavoidable common problem. Its reliability will directly affect the success of the task

The product has high passive intermodulation index requirements, large working power, wide temperature range, and severe thermal alternation. The feed source works in the low frequency band. The key components of source intermodulation, according to the traditional method, the ferrule adopts dielectric support, the root welding or crimping method, the performance of high and low temperature passive intermodulation is poor, and the ferrule cannot be detected separately, if there is a problem with passive intermodulation, install it to the feeder After the source, the entire feed product will be unqualified and cannot be used, and the passive intermodulation pass rate of the feed product cannot be reliably guaranteed

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