기판의 유전율과 두께에 따른 대칭형 부분 단락 MSA의 특성

Characteristics of Symmetrical Partially Shorted MSA with Permittivity and Thickness of Substrate

We designed and fabricated symmetrical partially shorted MSAs for 850 MHz band on various Copper-clad Laminates substrates, where the width of the radiation patch is identical with that of the ground plane and the radiation patch is partially shorted to the ground plane. The resonant frequency, return loss and input impedance due to the permittivity(2.5, 3.5, 10.0) and thickness(0.76~1.57 mm, 6 types) were measured by reducing the PSW (Partially Shorted Width) to 0 mm. As a result, good characterized antennas with average 11% reduced resonant length and return loss 7.288~29.445 dB were obtained when the total PSW was in the range of 70% of radiated patch width, compared to the conventional λ/4 MSA.