Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
Circuit engineering methods for increasing frequency selectivity of microstrip filters
based on half-wave co-directional hairpin resonators are studied, the principle of operation
which is based on the rational use of the effect of inequality of normal wave phase velocities.
It is shown that in these structures with N resonators, it is possible to form N + 1 operating
attenuation poles at finite frequencies without introducing additional electromagnetic couplings
between non-adjacent resonators. The conditions for splitting the operating attenuation poles in
compact multiply coupled structures are determined. The results of experimental studies of this
type of highly selective filter are presented.
Keywords:
Attenuation pole, Coupled structures, Equivalent circuit, Elliptical characteristic, Frequency response, High-selective filter, Hairpin resonator, Lattice section, Strip resonator, Microwave range.
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Authors:Bentham Science Books