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
In the structures considered in the previous chapter, a limited number of operating
attenuation poles (transmission zeros) P ≤ N + 1 is formed, which is a limiting factor for a
further increase of filter selectivity using resonators with a relatively low intrinsic Q factor.
This is due to the structural construction of these circuits and, as it seems to us, an insufficient
number of degrees of freedom in the independent control of the frequency properties of partial
two-pole impedances Za and Zb of their equivalent circuits. This chapter explores new properties
of single- and dual-resonator MSF structures, in which up to six or more operating attenuation
poles can be directly formed at finite frequencies, i.e., these structures with an extremely
minimal number of resonators sometimes demonstrate the properties of multi-resonator
microwave circuits.
Keywords:
Attenuation pole, Coupled microstrip line, Equivalent circuit, Frequency selectivity, Impedance, Lattice section, Microwave filter, Positive electric length, Passband, S-parameters.
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Authors:Bentham Science Books