Title :
Directive dual-band CP shorted ring-slot antenna
Author :
Heikkinen, Jouko J. ; Kivikoski, Markku A.
Author_Institution :
Dept. of Electron., Tampere Univ. of Technol., Tampere
Abstract :
In order to maximize the power captured from incident wave a directive antenna is required. As an example, high directivity is desired for rectifying antenna (rectenna) operating at low power densities, because the rectifier efficiency decreases at lower input power levels. Ring-slot antennas-being attractive for their simplicity and ease of integration, among others-are, however, bidirectional by their nature. Unidirectional radiation pattern can be achieved e.g. by reflector- or cavity-backing. In this paper, improved broadside CP performance of a microstrip-fed dual-band circularly polarized shorted ring-slot antenna is demonstrated when a single reflector is added to the structure.
Keywords :
antenna feeds; antenna radiation patterns; directive antennas; microstrip antennas; multifrequency antennas; polarisation; rectennas; reflector antennas; slot antennas; directive dual-band CP shorted ring-slot antenna; incident wave; microstrip-fed circularly polarized antenna; rectifying antenna; single reflector; unidirectional radiation pattern; Antenna feeds; Antenna measurements; Directive antennas; Dual band; Frequency; Gain measurement; Microstrip antennas; Reflection; Reflector antennas; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4618982
