Radiation characteristics of strip-loaded dielectric-coated conducting cylinder

Abstract

The radiation characteristics of strip-loaded dielectric-coated conducting cylinder are investigated theoretically for the infinite and finite periodic structures. For the infinite case, the strip electric current expansion satisfying edge condition and the field expression with a summation of space harmonics are applied to solve a homogeneous matrix equation. The integral equation is derived for the finite structure by using the inverse Fourier transform and the strip current expansion. The influences of the strip width, cylinder radius, and finite strip number on the radiation characteristics (leakage constant, phase constant, radiation pattern, and beam scanning) are investigated. The results of the finite periodic strips are compared with those of the infinite extent structure and good agreement is found.

B7. Leaky-Wave Coaxial Antenna

“…Another promising solution is to use a cylindrically shaped leaky wave antenna with azimuthally symmetric radiation. Different configurations can be used for these applications like cylindrical dielectric rod, corrugated dielectric rod, metamaterial shell waveguide and coaxial structure with periodic perturbation on its outer side [1][2][3][4][5][6][7][8][9][10]. The last configuration is target of the present paper.…”

“…In [7] Xu and Wu applied this modal analysis with slightly modified boundary condition to the study the wave propagation along a cylindrical dielectric rod loaded metallic strip grating. This analysis was further modified by Kim and Lee [5] to study the wave propagation along a cylindrical conductor coated with a dielectric cylindrical shell and loaded by a metallic strip grating. Lee and Son [8] generalized this analysis for this coaxial structure for both finite and zero thickness metallic grating on the outside metallic side of the coaxial structure.…”