Title :
Propeller-Shaped Antenna: A Steerable Ultrawideband Planar Antenna
Author :
Takemoto, Erika ; Hirose, Akira
Author_Institution :
Dept. of Bioeng., Univ. of Tokyo, Tokyo, Japan
Abstract :
We propose an ultrawideband planar antenna having a controllable radiation pattern for coarse steering to avoid fading in indoor communications. In the antenna, multiple tapered-slot antenna (TSA) elements are connected to a feeding part through p-i-n diode switches. The TSA elements have such wide aperture and round shape that the mutual coupling among them is effectively suppressed, resulting in sufficient steering ability. Simulation and experiments demonstrate that the radiation is switched to intended directions. Reflection S11 is below or around -10 dB in the frequency range of 3.1-10.6 GHz independent of the switching condition. Basic characteristics are investigated and discussed.
Keywords :
adaptive antenna arrays; antenna radiation patterns; indoor communication; p-i-n diodes; planar antenna arrays; slot antenna arrays; ultra wideband antennas; TSA elements; coarse steering; controllable radiation pattern; frequency 3.1 GHz to 10.6 GHz; indoor communications; multiple tapered-slot antenna; p-i-n diode switches; propeller-shaped antenna; smart antennas; steerable ultrawideband planar antenna; steering ability; switching condition; PIN photodiodes; Slot antennas; Switches; Ultra wideband antennas; Directive antenna; taper-slot antenna; ultrawideband antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2330602
