Title :
High gain tunable antenna with fractal, swept-back radiator
Author :
Lin, Zhen-Biao ; Lin, Jack J -Q ; Robin, Seymour
Author_Institution :
Sensor Syst., Inc., Chatsworth, CA, USA
Abstract :
In this paper our analysis starts from Chu´s theoretical fundamental limits of small antenna. The main efforts include: elaborate design modified Fractal radiator and low loss RF tuning with software defined architecture. Test results show significant improvement in radiation efficiency, selectivity and broaden band. Such as, the gain of new Fractal tunable antenna is -7.5dBi at 30MHz against passive antenna -23dBi and monopole tunable -15dBi. This antenna is ideal for replacement of existing VHF/UHF antenna on high speed aircraft and support SINCGAR and HAVEQUICK frequency hopping.
Keywords :
antenna radiation patterns; fractal antennas; monopole antennas; software radio; Chu theoretical fundamental limits; HAVEQUICK frequency hopping; SINCGAR frequency hopping; VHF-UHF antenna; bandwidth 30 MHz; fractal tunable antenna; high gain tunable antenna; modified fractal radiator; monopole antenna; radiation efficiency; software defined architecture; swept-back radiator; Aircraft; Blades; Fractals; Impedance; Inductors; Radio frequency; Spirals; Tunable circuits and devices; Tuning; UHF antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
978-1-4244-3647-7
DOI :
10.1109/APS.2009.5172234
