Characterization and Dielectric Properties of Novel Dielectric Ceramics <scp>C</scp>a_<i>x</i><scp>Z</scp>n_{(1−<i>x</i>)}<scp>A</scp>l₂O₄ for <scp>GPS</scp> Patch Antennas

A solgel method was used to prepare C a x Z n (1− x ) A l 2 O 4 thin films and fabricate GPS patch antennas. The addition of calcium ( C a) has increased the ε r , crystallite size, and grain size, to increase the ceramics density. The three highest Q × f values appear at the position of x = 0.05 (31,091 MHz ), 0.15 (63,906 MHz ), and 0.25 (40,609 MHz ), respectively. The best combination of microwave dielectric properties (ε r ~ 9.02), Q × f ~ 63,906 MHz and with the lowest return lost (−25 d B ) is obtained for specimen using C a 0.15 Z n 0.85 A l 2 O 4 ( x = 0.15) ceramics, which is the suggested material for GPS patch antennas.