Title :
Characteristics of Double Exponentially Tapered Slot Antenna (DETSA) Conformed in the Longitudinal Direction Around a Cylinder
Author :
Ponchak, George E. ; Jordan, Jennifer L. ; Chevalier, Christine T.
Author_Institution :
NASA Glenn Res. Center, Cleveland, OH
fDate :
6/29/1905 12:00:00 AM
Abstract :
The characteristics of a double exponentially tapered slot antenna (DETSA) as a function of the radius that the DETSA is conformed to in the longitudinal direction is presented. It is shown through measurements and simulations that the radiation pattern of the conformed antenna rotates in the direction through which the antenna is curved, and that diffraction affects the radiation pattern if the radius of curvature is too small or the frequency too high. The gain of the antenna degrades by only 1 dB if the radius of curvature is large and more than 2 dB for smaller radii. The main effect due to curving the antenna is an increased cross polarization in the E-plane
Keywords :
antenna radiation patterns; conformal antennas; electromagnetic wave polarisation; slot antennas; DETSA; E-plane cross polarization; conformed antenna; diffraction effects; double exponentially tapered slot antenna; foam cylinder; radiation pattern; Antenna measurements; Antenna radiation patterns; Degradation; Diffraction; Directive antennas; Frequency measurement; NASA; Rotation measurement; Slot antennas; Slotline; Conformal antenna; double exponentially tapered slot antenna (DETSA); slot-line antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2007.890764
