Accession Number:

AD0656787

Title:

WAVE PROPAGATION ALONG PERIODIC STRUCTURES AND PLASMA SLABS.

Descriptive Note:

Final scientific rept. 1 Oct 64-30 Apr 67,

Corporate Author:

LEEDS UNIV (ENGLAND) DEPT OF ELECTRICAL AND ELECTRONIC ENGINEERING

Report Date:

1967-05-01

Pagination or Media Count:

52.0

Abstract:

Guided electromagnetic wave propagation along two distinctly different structures has been studied. Structure A consists of a disc-loaded dielectric rod with or without a centre conductor. The main objective is to evaluate its use as a microwave delay-line for pulse compression. Expressions for the dispersion equations, power flow and attenuation coefficient are derived and numerical results of group-delay, propagation and attenuation coefficient as a function of signal frequency are presented for a range of values of the parameters. The problem of determining a set of parameters which will give rise to a prescribed propagation characteristic, in particular that giving linear group delay vs frequency has been solved numerically using an optimization procedure. Structure B consists of a plasma slab backed by a conducting plane with or without an ion sheath between them. The constraints usually applied to this model of zero loss, zero electron temperature and no ion sheath are relaxed one at a time, and dispersion curves with one or more constraints relaxed are presented. This procedure is deemed necessary to aid interpretation of experiments on laboratory or actual plasmas which are not definable by a single idealized model. The theoretical formulation of the problem is such that extension to more complicated plasma-slab configurations can be readily made. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Plasma Physics and Magnetohydrodynamics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE