Title :
Design of a small size dielectric loaded helical antenna for satellite communications
Author :
Niow, C.H. ; Mouthaan, K. ; Coetzee, J.C. ; Hui, H.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
The trade-offs in terms of performance and size of an axial-mode helical antenna for satellite communications are investigated. The antenna size is reduced by using a backfire bifilar helical antenna (BBHA) combined with a dielectric core. The antenna is designed using Ansoft´s HFSS and the results are verified experimentally. A size reduction of 70% is achieved. The gain at 2.4 GHz is 2.6 dBic with an axial ratio bandwidth of 400 MHz. The half power bandwidth is 80 degrees and the antenna return loss is below -10 dB between 2.2 GHz to 2.6 GHz. A two-element dielectric-loaded BBHA array is simulated using HFSS and results are compared with a single dielectric-loaded BBHA.
Keywords :
antenna arrays; dielectric-loaded antennas; helical antennas; satellite communication; axial ratio bandwidth; axial-mode helical antenna; backfire bifilar helical antenna; bandwidth 400 MHz; dielectric core; dielectric loaded helical antenna; frequency 2.2 GHz to 2.6 GHz; frequency 2.4 GHz; satellite communications; two-element dielectric-loaded BBHA array; Antenna measurements; Bandwidth; Design engineering; Dielectric losses; Feeds; Helical antennas; Loaded antennas; Polarization; Satellite antennas; Satellite communication; dielectric loaded antennas; helical antennas; satellite communication;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385499
