Title :
Radiation characteristics of a circular waveguide containing a chiral medium
Author_Institution :
Dept. of Electr. Eng., Massachusetts Univ., Lowell, MA, USA
fDate :
2/1/1992 12:00:00 AM
Abstract :
The boundary value problem of a circular waveguide that is completely filled with a homogeneous, lossless and isotropic chiral medium is solved and the axial phase constant is determined from a numerical solution of the characteristic equation. The electric and magnetic field components in the transverse plane are determined and subsequently used in the radiation integrals to obtain the far-field components. The variation of such radiation characteristics as the halfpower beamwidths in the principal planes and directivity are studied as functions of the electrical radius and normalised chirality admittance parameter. Some comparisons are made between the different propagating hybrid modes in the chirowaveguides
Keywords :
antenna radiation patterns; boundary-value problems; circular waveguides; numerical analysis; waveguide antennas; waveguide theory; axial phase constant; boundary value problem; chirowaveguides; circular waveguide; directivity; electric field components; electrical radius; far-field components; halfpower beamwidths; homogeneous lossless chiral medium; hybrid modes; isotropic chiral medium; magnetic field components; normalised chirality admittance parameter; numerical solution; radiation characteristics; radiation patterns; waveguide antenna;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
