Title :
A printed leaky-wave circularly polarized antenna using exponentially curved slots for broadside radiation
Author :
Lin, Shih-Kai ; Lin, Yi-Cheng
Author_Institution :
Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A leaky-wave circularly polarized (CP) antenna is presented. The antenna consists of an exponentially curved slot in a ground plane, a microstrip line feed and a microstrip-to-slot transition. The presented antenna performs wideband characteristics, including the 15% axial ratio (AR) bandwidth and the 55% impedance and gain flatness bandwidth. Additionally, the tilt beam issue of leaky-wave type patterns is discussed and overcome with an extended design of the presented antenna. The extended antenna performances even better bandwidth (the 3-dB AR bandwidth of 34%) and more stable radiation patterns (the peak gain around the zenith with a level of 7.7 dBic).
Keywords :
antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; microstrip lines; polarisation; slot antennas; broadside radiation; circularly polarized antenna; exponentially curved slots; ground plane; leaky-wave antenna; microstrip line feed; microstrip-to-slot transition; printed antenna; radiation patterns; wideband characteristics; Radio access networks; Circular polarization; broad band; leaky-wave antenna; planar; slot antenna;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
