Design of narrow-width Fermi antenna with circular radiation pattern

Author

Sato, Hiroyasu ; Sawaya, Kunio ; Wagatsuma, Yoshihiko ; Mizuno, Koji

Author_Institution

Graduate Sch. of Eng., Tohoku Univ., Sendai, Japan

Volume

4

fYear

2004

fDate

20-25 June 2004

Firstpage

4312

Abstract

The design of the Fermi antenna as a receiving element of PMMW imaging is presented. Using the FDTD analysis, it has been found that the beamwidth of the E-plane and the H-plane of the Fermi antenna can be controlled by changing the width of the aperture and the position of the inflection point of the Fermi-Dirac taper profile respectively. Using these characteristics, a Fermi antenna with circular radiation pattern having a beamwidth of 52° and geometrical width of 0.58λ₀ which fits to the f/D=1 optics have been obtained.

Keywords

antenna radiation patterns; aperture antennas; finite difference time-domain analysis; microwave imaging; receiving antennas; E-plane; FDTD analysis; Fermi-Dirac taper profile; H-plane; PMMW imaging; aperture width; circular radiation pattern; inflection point position; narrow-width Fermi antenna; receiving element; Antenna arrays; Antenna radiation patterns; Aperture antennas; Dielectric substrates; Finite difference methods; Geometry; High-resolution imaging; Image resolution; Lenses; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2004. IEEE

Print_ISBN

0-7803-8302-8

Type

conf

DOI

10.1109/APS.2004.1330305

Filename

1330305