In the microwave range there are used the simplest open cylindrical round cross-section waveguides of the semiconductor, fertile and dielectric materials. They have a wide working frequency range and good electrodynamical characteristics [1]. Dielectric materials usually are used in microwave devices such as filters, coplanar waveguides, transmission lines [2-4]. Open cylindrical semiconductor and ferrite waveguides placed in the longitudinal magnetic fields are investigated in [5]. Also in some works semiconductor (plasma) waveguides their electrodynamical models and calculated dispersion and losses characteristics are presented. These research results are used for design and manufacture microwave devices [5-6]. In this paper dispersion characteristics and broadband width analysis of the cylindrical gyroelectrical n, p-InAs, n, p-InP waveguides are presented. These type semiconductor waveguides are investigated because they are rarely explored and their electrodynamical characteristics should be taken in account, designing microwave devices. Also in this article the original algorithm to calculate dispersion characteristics is presented.
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