Title :
A Pattern-Frequency-Dependent Wide-Band Slot Antenna
Author :
Wang, Chien-Jen ; Lee, Jin-Jei
Abstract :
A new design for a coplanar waveguide (CPW)-fed wide-band slot antenna is presented in this letter. The basis for achieving such a broadband operation is to create a multiresonator in a slot cavity. By using a modified fork-like feeding structure, several different equivalent magnetic current paths are alternatively excited when the operated frequency is changed. Due to different radiation regions, the radiation pattern, including the end-fire or bore-sight direction, changes frequency-dependently. A 220% impedance bandwidth ( $ S _11 ¿ -10~ dB$) is demonstrated. Simulated and measured results of the antenna are presented.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; cavity resonators; coplanar waveguides; slot antennas; CPW-fed slot antenna; coplanar waveguide; core-sight direction; end-fire direction; equivalent magnetic current paths; fork-like feeding structure; multiresonator; pattern-frequency-dependent antenna; radiation pattern; slot cavity; wide-band slot antenna; Antenna measurements; Antenna radiation patterns; Antennas and propagation; Bandwidth; Broadband antennas; Coplanar waveguides; Frequency; Reflection; Reflector antennas; Slot antennas; Fork-like; magnetic current; multiresonator;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2006.870369
