Analysis of flared end for Vlasov-type antenna: comparison of 2D finite element analysis with experiment

Author

Braunstein, J. ; Connor, K. ; Salon, S. ; Libelo, L. ; Schlesiger, C.D.

Author_Institution

Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3120

Lastpage

3123

Abstract

Improved beam focusing of high powered microwaves radiating from a Vlasov-type antenna can be achieved by applying a flare to the launcher aperture. A frequency domain two dimensional hybrid finite-boundary element model solves the near field time harmonic wave equation. Linear interpolation of boundary magnetic and electric fields is used for the Hankel function approximation of the far field. Three significant advantages are noticed with flare application: (a) beam narrowing, with increased center peak intensity, (b) reduction in side-lobe fields, and (c) increased mode purity in the waveguide. Results are in agreement with experimental data

Keywords

Green´s function methods; antenna theory; boundary-elements methods; finite element analysis; focusing; frequency-domain analysis; interpolation; waveguide antennas; 2D finite element analysis; 2D hybrid finite-boundary element model; Hankel function approximation; Vlasov-type antenna; beam focusing; beam narrowing; boundary electric fields; boundary magnetic fields; center peak intensity; far field approximation; flared end analysis; frequency domain model; high powered microwaves; launcher aperture; linear interpolation; mode purity; near field time harmonic wave equation; side-lobe fields reduction; Boundary conditions; Finite element methods; Geometry; Green´s function methods; Laboratories; Magnetic fields; Microwave propagation; Military computing; Milling machines; Partial differential equations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312598

Filename

312598