Focusing properties of a microwave radiator utilizing a slotted rectangular waveguide

Author

Ohtera, Isao

Author_Institution

Tohoku Inst. of Technol., Sendai, Japan

Volume

38

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

121

Lastpage

124

Abstract

A microwave radiator, utilizing a slotted rectangular waveguide that is bent into an equiangular spiral, for focusing leaky microwaves radiated from a continuous longitudinal slot is presented. The radiation fields near the focus are derived by setting up a magnetic current on the slot. Some of the fundamental focusing properties of this spiral slotted rectangular waveguide (SSRW) radiator, such as the radiated power distribution and the phase behavior near the focus, are also discussed numerically. The power distribution near the focus in the form of intensity contours is compared with preliminary measurement of the prototype operating at 10 GHz

Keywords

focusing; rectangular waveguides; waveguide antennas; 10 GHz; continuous longitudinal slot; equiangular spiral; focusing properties; leaky wave antennas; magnetic current; microwave radiator; phase behavior; radiated power distribution; slotted rectangular waveguide; Dielectrics; Electromagnetic heating; Geometry; Microwave theory and techniques; Optical waveguides; Plasma properties; Power distribution; Propagation constant; Rectangular waveguides; Spirals;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.43598

Filename

43598