| Summary: | This report gives the design of two differential microstrip patch antennas on the same
substrate. First, background information on the antenna and the microstrip patch
antenna is presented. Second, the design equation of single-ended microstrip patch
antenna is used to determine the length of differential microstrip rectangular patch.
Third, the width and feed point of the differential microstrip rectangular patch are
determined and designed using SONNET. The isolation results between the two
differential microstrip patch antennas are related to the S-parameters of the differential
pattern, which can be obtained from MATLAB. In addition, two differential circular
patch antennas are designed and compared with two differential rectangular patch
antennas. The results show that the insertion loss of the circular antennas is -14 dB,
while that of the rectangular antennasis -12.2 dB, which means that the two differential
circular antennas have better isolation.
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