Abstract
The design of slot-coupled, reduced-size triangular microstrip antennas with a shorting-pin or chip-resistor loading is described. The fundamental mode of TM10 is studied. Impedance matching can be achieved simply by adjusting the coupling-slot size, with the slot center fixed at the null-field point of the TM10 mode, and the required slot size increasing with increasing loading resistance. The case with a chip-resistor loading also shows a lower resonant frequency and a significantly enhanced operating bandwidth, as compared with the shorting-pin loading case. Details of the experimental results are presented and discussed. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 16: 371–374, 1997.
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