Device for reducing passive intermodulation of circular waveguide duplexer and method thereof

A passive intermodulation and duplexer technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of single structural improvement scheme, high design cost, and long experiment cycle, so as to shorten the design cycle and design cycle The effect of long life and low processing cost

CN109524750AInactive Publication Date: 2019-03-26BEIJING INSTITUTE OF TECHNOLOGYGY +1
7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-26
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention, which relates to the field of microwave wireless communication, discloses a device for reducing the passive intermodulation of a circular waveguide duplexer and a method thereof. According to the invention, metal-air-metal contact is realized by using a dielectric flange and metal-non-conductive-dielectric-metal contact is realized by using a dielectric sheet, so that passive intermodulation of microwave parts is suppressed. The device comprises a non-conductive dielectric flange, metal screws required by fixing the non-conductive dielectric flange, a non-conductive dielectric sheet, a non-conductive dielectric sleeve, and non-conductive dielectric screws. The device has advantages of simple structure, light weight, high design cost rate and short design period. The device and the method thereof can be applied to the fields of aerospace and ground communication widely.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of microwave wireless communication, in particular to a device and method for reducing passive intermodulation of a circular waveguide duplexer. Background technique

[0002] Passive intermodulation (PIM) occurs when two or more signals pass through passive components. In a satellite communication system, a pair of antennas may undertake both transmitting and receiving tasks, and the working power range may reach several watts, tens of watts or even higher. The existence of contacts, junctions, interfaces or devices with nonlinear voltage and current conduction characteristics in passive microwave components will cause system performance degradation, because the current of multiple carrier channels can flow through these junctions or devices at the same time, due to these The mixing effect of the carrier produces new unwanted intermodulation frequency components, and these signals may reach the receiving channel to f...

Examples

Embodiment 1

[0029] A device for reducing passive intermodulation of a circular waveguide duplexer disclosed in this embodiment includes a non-conductive medium flange 1, metal screws 4 required for fixing the non-conductive medium flange, a non-conductive medium sheet 5, and a non-conductive medium sleeve 7. Non-conductive medium screw 9. The circular waveguide duplexer includes frequency modulation, tuning coupling screw 2, metal cavity wall 3, input and output feed rod 6, coaxial connector inner core 8, coaxial connector 10, second cavity body 11, first A cavity 12 , a main waveguide 13 , and a waveguide port 14 at the common end of the duplexer.

[0030] The cavity includes a second cavity 11 and a first cavity 12 . At the frequency tuning and tuning coupling screw 2 and the cavity, a non-conductive medium flange is used to isolate the metal-to-metal contact, so as to realize the connection mode of metal-non-conductive medium-metal.

[0031] At the joint between the frequency modulat...