Optimization of bow-tie antennas for pulse radiation

Author

Shlager, Kurt L. ; Smith, Glenn S. ; Maloney, James G.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

42

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

975

Lastpage

982

Abstract

Resistively loaded bow-tie antennas are considered as radiators for temporally short, broad-bandwidth pulses. Analysis is by the finite-difference time-domain (FDTD) method. The geometrical details of the antenna and the resistive loading along the antenna are chosen to optimize this antenna for pulse radiation. Theoretical results for the reflected voltage in the coaxial feed line and the time-varying radiated electric field are compared throughout with experimental measurements. The optimized, resistive bow-tie antenna is shown to radiate a pulse that more closely resembles that of the excitation than is radiated by a metallic bow tie of comparable size. Issues involving the use of the FDTD method for modeling fully three-dimensional antennas are also discussed. These issues include the use of a simple feed model and the staircasing of the edges of the antenna

Keywords

antenna feeders; antenna radiation patterns; antennas; finite difference time-domain analysis; FDTD method; bow-tie antennas; broad-bandwidth pulses; coaxial feed line; finite-difference time-domain; pulse radiation; reflected voltage; resistive loading; staircasing; three-dimensional antennas; time-varying radiated electric field; Antenna feeds; Antenna measurements; Antennas and propagation; Coaxial components; Dipole antennas; Finite difference methods; Loaded antennas; Optimization methods; Steady-state; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.299600

Filename

299600