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Telecommunications and Radio Engineering

ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v71.i2.70
pages 177-185

SUBMILLIMETRIC-WAVE RANGE REJECTION FILTER OF SPURIOUS HYBRID MODES IN HOLLOW DIELECTRIC WAVEGUIDE

A. I. Goroshko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
V. K. Kiseliov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine; V.N.Karazin Kharkiv National University 4, Svobody sq., 61022, Kharkiv, Ukraine

ABSTRACT

The breadboard modes of rejection in a circular hollow dielectric waveguide has been analyzed and experimentally studied. The filter is a waveguide segment bounded by two planar one-dimensional wire grating. This type of filter suppresses spurious modes down to 15...20 dB, as the operating HE11 mode gets damped down to 3 dB at 300 GHz in a waveguide of diameter 20 mm.