Strong field mode filter for only reserving TE0n mode

Abstract

The invention discloses a strong field mode filter for only reserving a TE0n mode. The strong field mode filter comprises an input flange and an output flange for connection; a barrel-shaped parasiticmode absorption part is connected between the two flanges; a heat dissipation assembly is arranged on the outer wall of the parasitic mode absorption part in the axial direction; the two ends of theheat dissipation assembly are connected to the two flanges; the heat dissipation assembly comprises a shell arranged on the outer surface of the parasitic mode absorption part and a heat dissipation part arranged outside the shell; and the heat dissipation assembly, the flanges and the parasitic mode absorption part form an overall regular hollow cylinder. The strong field mode filter is based onthe dielectric loaded loss principle, however, electrical resistivity anisotropic materials are adopted to realize filtering of all non-TE0n modes, so that the strong field mode filter has the characteristics of high power capacity and capability of filtering all non-TE0n mode parasitic modes.

Description

technical field [0001] The present invention relates to the field of microwave and millimeter wave technology, and specifically refers to a mode filter working under a strong field strength, which can attenuate and filter out input non-TE0n mode microwave signals, and save only TE0n mode low-loss transmission devices. Background technique [0002] With the development of microwave source technology, the microwave system is developing towards higher frequency and stronger field strength, and the transmission guided wave system has also changed from coaxial waveguide and rectangular waveguide to over-molded circular waveguide with higher power capacity. Since the TE0n mode has no longitudinal wall current, the transmission loss decreases monotonously with the increase of frequency, and it is widely used for microwave energy transmission in overmolded circular waveguides. However, the TE0n mode is a high-order overmode. Once the structure is disturbed, it is easy to generate mi...

AI Technical Summary

Problems solved by technology

In the first way, by reducing the radius of the waveguide, all the miscellaneous mode modes whose cutoff frequency is higher than the operating frequency of the TE0n mode can be filtered out, but it will reduce the power capacity of the working TE0n mode and increase the probability of system failure; in the second way, The mixed mode field reflection field is reflected back and forth in the system, which is easy to damage other microwave devices; at the same time, the above two methods are only effective for certain specific mixed modes, but not for all the mixed modes.

In contrast, using dielectric loading to efficiently absorb and consume miscellaneous modes can ensure the power capacity, stability, and reliability of the system, which has great application advantages. Absorption consumes the TE0n mode, which does not meet the electrical performance index requirements for low insertion loss of the transmission system; at the same time, when the system works in the strong field TE0n mode, the power of the TE0n mode and the miscellaneous mode dissipated by the medium is extremely large, which easily leads to the loading of the medium The temperature is too high, which leads to the failure of the microwave system

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