Analysis of Rectangular Microstrip Patch Antennas with the Multilayered Structure and the Electromagnetically Coupled Feed Structure

다층구조와 전자장결합 급전구조를 갖는 사각형 마이크로스트립 패치안테나의 해석

In this papaer, the input impedance of the rectangular microstrip patch antennas with the multilayered structure is analysed by using the moment method technique in the spectral domain. The analysis is carried out for two different feeding structures : directfeeding structure and electromagnetic-feeding structure. In order to obtain the accurate input impedance, the current distribution on the microstrip feed line is modeled by the quasi-TEM travelling wave and the PWS(piecewise sinusoidal) mode. The input impedances of the designed microstrip antennas are measured and compared with the calculation. which shows a good agreement.