Effect of electroacoustic waves on radiation properties of microstrip matched coaxial termination

Abstract

Expressions for the field intensities in a warm ionized plasma for two type of modes (electromagnetic and electroacoustic) pertaining to a microstrip matched coaxial termination are obtained using linearized hydrodynamic theory coupled with a vector function technique. The radiation power and directivity for the respective modes are evaluated for different ratios of plasma to source frequencies. It is observed that electromagnetic fields are similar to other microstrip antenna structures, but more directive in a particular direction. The electroacoustic mode exhibits a complete absence of multilobed structure, which was found for other antenna structures. The efficiency of this structure in a plasma is poor.

Effect of Warm Ionized Plasma Medium on Radiation Properties of Mismatched Microstrip Termination

“…Considering the presence of both these currents together and following the method of [8], the expressions for the radiation patterns are obtained in electromagnetic mode as well as in electroacoustic mode. These expressions are: …”

“…3dB beamwidth in  and  planes for [6]. Similarly on substituting 0 R  and    , expressions for microstrip matched termination can be obtained [8].…”

“…For different values of plasma to source frequencies, expressions for radiated power are obtained by using the method of [8].These expressions are: …”

Effect of ionized plasma medium on the radiation performance of right triangular microstrip antenna (RTMA)

“…The initial assumption and basic equation used in the present communication to define two component plasma model are available elsewhere [2]. Under the simplifying assumptions, the electromagnetic and plasma fields are uncoupled and are separated in two independent modes namely electromagnetic (EM) and electroacoustic (EA) modes [3].…”