Title :
Focusing properties of a microwave radiator utilizing a slotted rectangular waveguide
Author_Institution :
Tohoku Inst. of Technol., Sendai, Japan
fDate :
1/1/1990 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
