Calculation of a specialized antenna for biological research

Abstract

As transmission lines in the decimeter and centimeter wavelength ranges, mainly waveguides, coaxial and strip lines are used. Currently, devices called strip lines are widely used. Stripe lines are devices that consist of two or more conductive strips along which an electromagnetic wave propagates. There are many types of strip lines. Typically, such lines are made in the form of thin metal layers deposited on dielectric sheets. Materials with low losses in the considered microwave range are used as such substrates.

Strip lines are capable of transmitting energy on a TEM wave at virtually any frequency.

It is known that TEM-type vibrations can propagate in a strip line only if it is a lossless system and is completely filled with a homogeneous isotropic dielectric. At present, the most common strip lines are made of solid dielectric plates with thin layers of metal deposited on them in some way. In such a system, the field is mainly concentrated around the charged plate; the characteristics of the line practically do not change if we assume that it is in an infinite dielectric. In this work, the electrical characteristics of the strip waveguide are calculated, which makes it possible to implement its practical implementation, to choose the geometric dimensions of the antenna. The calculation technique used in this work allows one to obtain fairly simple analytical expressions characterizing the distribution of fields of wave impedances, linear capacities and other parameters of antenna systems.