Maximally-flat Filters in Waveguide

Autor:	W. W. Mumford
Rok vydání:	1948
Předmět:	Waveguide (electromagnetism) Engineering business.industry General Engineering Filter (signal processing) Microwave transmission Topology law.invention Electric power transmission Relay law Electronic engineering Insertion loss business Electrical impedance Electronic circuit
Zdroj:	Bell System Technical Journal. 27:684-713
ISSN:	0005-8580
DOI:	10.1002/j.1538-7305.1948.tb00919.x
Popis:	Microwave radio relay repeaters require the use of band-pass filters which match closely the impedances of the interconnecting transmission lines and which suppress adjacent channels adequately. A type of structure culled a Maximally-Flat filter meets these requirements. The ladder network which gives a maximally-flat insertion loss characteristic is discussed and several methods of achieving its counterpart in microwave transmission lines are presented. Resonant cavities are used to simulate tuned circuits and the necessary formulas relative to this approximate equivalence are given. Experimental data confirm the theory and show that this technique yields remarkable impedance matches.
Databáze:	OpenAIRE
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