Filtering of Microwave Signals for Satellite Communication Systems

Abstract

High electrical strength and low losses compared to other transmission lines predetermined the widespread use of waveguide filters and multiplexers in on-board radioelectronic complexes of satellite communication systems. The electrical parameters of these devices, taking into account the specifics of their operation in near-Earth orbit, are subject to fairly stringent requirements: high power limit, temperature stability, weight, and size indicators. Their disadvantages can be considered as a limited range of operating frequencies, determined by the cutoff frequencies of the main and first higher modes, as well as relatively large sizes. Very high requirements are also placed on the accuracy of the manufacture of filtration devices. At present, in the literature, one can find a description of a large number of various designs of band-pass filters of the waveguide type. Some of them are considered in the present chapter.

Keywords: Band-pass, Central frequency, Dual-band filters, Helical resonator, In-line topology, Microwave range, Power-handling capability, Q-factor, Space communication systems, Waveguide filter.