Title :
A patch antenna surrounded by parasitic Y elements for beam scanning
Author :
Nakano, H. ; Aoki, R. ; Kobayashi, R. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei
Abstract :
This paper presents a small antenna system that realizes a scanning beam. The antenna system is composed of one fed patch element (into which a ring slot is cut), four parasitic bent Y elements, and four parasitic inverted L-shaped elements. These elements are all backed by a ground plane. It is emphasized that the center-to-center spacing between the fed patch and the parasitic bent Y elements is smaller than that in the array discussed in K. Murata et al. (2005). The direction of the radiation beam from this antenna system is varied by open-circuiting or short-circuiting the ends of the four parasitic bent Y elements to the ground plane, as in K. Murata et al., (2005). Also, note that the antenna system does not use phase shifters, which are commonly used for scanning the beam in conventional phased array antennas
Keywords :
antenna feeds; antenna phased arrays; antenna radiation patterns; microstrip antenna arrays; microwave phase shifters; beam scanning; center-to-center spacing; fed patch element; parasitic bent Y elements; parasitic inverted L-shaped elements; patch antenna; phase shifters; phased array antennas; radiation beam; Antenna arrays; Directive antennas; Educational institutions; Feeds; Patch antennas; Phase shifters; Phased arrays; Slot antennas; Switches; Switching circuits;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1711056