3) Antenna properties and the size of the GND area

In this experiment a total of 15 samples with different board dimensions were prepared in order to see the influence of GND size to the antenna properties.

・It was obvious that bandwidth and antenna gain are dramatically improved by enlarging the board length as shown in Fig.3-2 and Fig.3-3. When bandwidth was widened by 9 to 17MHz the antenna gain improved by 6dB.
・It was revealed that decreasing the Width (W) and increasing the Length (L) of the GND samples improved the bandwidth and average gain. This result suggests that an oblong shaped PCB is advantageous for good antenna performance .





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