| ZnAl2O4-Based Microwave Dielectric Ceramics as
GPS Patch Antenna: A Review |
Wan Nasarudin Wan Jalal, Huda Abdullah*, Mohd Syafiq Zulfakar, Badariah Bais, Sahbudin Shaari1 and
Mohammad Thariqul Islam2
pages 215-224
DOI:10.1080/0371750X.2013.868323 |
| Abstract |
| This paper describes the potentials of zinc aluminate (ZnAl2O4) based microwave dielectric ceramics as patch
antenna for GPS applications. Nowadays the GPS operating frequencies has been shifted from microwave technology
to millimeter-wave technology. Various microwave dielectric ceramics (MDC) have been explored and widely used
in telecommunication industries. Among the most interesting materials of that kind, zinc aluminate (ZnAl2O4) is
recognized as one of the most promising non-metals and offers many advantages as GPS patch antenna. By
modifying ZnAl2O4 compound with other materials, it is found to have high quality factor (Q5,000), low dielectric
constant (r20), and near zero temperature coefficient of resonant frequency (f~0). The studies also evidence the
typical value of r for GPS patch antenna and microwave substrate in the range of 4r20 and 4<r<10, respectively.
The study also shows that the ZnAl2O4-based MDC can be successfully fabricated as microstrip patch antenna,
which meets the requirements of GPS application.
[Keywords: Microwave and millimeter-wave, ZnAl2O4, GPS patch antenna, Dielectric properties, Return loss] |
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