Title :
An extremely low-profile helical array antenna
Author :
Nakano, H. ; Takeda, H. ; Honma, T. ; Mimaki, H. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
An extremely-low-profile helical array antenna has been designed for a frequency band of 11.7 GHz to 12.0 GHz. Calculations show how proper spacing of the helical elements serves to reduce the deterioration in the directivity of a helical array antenna when the radiation beam is tilted from the normal direction of the array plane. The measured aperture efficiency shows a maximum value of 80% for a beam radiated in the normal direction and 71% for a 30 degrees beam tilt.<>
Keywords :
antenna radiation patterns; directive antennas; frequency response; microwave antenna arrays; SHF; aperture efficiency; directivity; extremely low-profile helical array antenna; frequency responses; helical elements; microwave antenna array; radiation patterns; spacing; Antenna arrays; Frequency; Helical antennas; Microstrip antenna arrays; Microstrip antennas; Phased arrays; Planar waveguides; Polarization; Satellite antennas; Satellite broadcasting;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115206
