Title :
Fractal GPS antenna design on piezoelectric substrate
Author :
Tang, Tzu-Chun ; Tsai, Cheng-Han ; Lin, Ken-Huang ; Huang, Yu-Tung ; Chen, Chi-Yun
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-San Univ., Taiwan
Abstract :
This paper presents a study of fractal GPS antenna design on piezoelectric substrate. The antenna size is reduced by using piezoelectric materials with high dielectric constant and the fractal structure in antenna design. The desired high effective dielectric constant can be obtained by the special arrangement of the ground. The Koch fractal structure is employed in antenna design. With the corner-truncated structure, the right-handed circular polarization (RHCP) is obtained. The radiation efficiency of the antenna is considered, and then the modified ground is introduced to further improve the radiation efficiency of the antenna. The radiation efficiency can be significantly improved when the modified ground is designed on the system board. The effect of the GPS module connections to the antenna is also investigated, and then the matching circuit is added to obtain better matching.
Keywords :
Global Positioning System; antennas; fractals; piezoelectric materials; polarisation; GPS module connections; Koch fractal structure; antenna size; corner-truncated structure; fractal GPS antenna design; high dielectric constant; matching circuit; piezoelectric materials; piezoelectric substrate; radiation efficiency; right-handed circular polarization; Antennas; Dielectric constant; Fractals; Global Positioning System; Piezoelectric materials; Resonant frequency; Substrates; Fractal antenna; matching circuit; modified ground; piezoelectric material;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
