Performance improvement of H-Shaped antenna with Zener diode for textile applications
S. Kannadhasan, R. Nagarajan
Abstract
Wireless network becoming an integral part of daily existence, and it is expected to become much more so in the future. The dual-band frequency-reconfigurable H-shaped microstrip antenna fed by two coaxial probes is presented. The two modes for textile applications, the antenna is symmetrically filled with back-to-back attached zener diodes. The first mode’s tuneable range is between 2 GHz and 2.5 GHz, while the second mode’s range is between 1.5 GHz and 4.8 GHz. The suggested antenna’s radiation can be switched from two orthogonal linear polarizations in the 1.5 GHz to 2.5 GHz range by adjusting the capacitance of the zener diodes. The HFSS is used for designing and simulating the antenna and antenna performs well in terms of Voltage Standing Wave Ratio [VSWR], Return Loss, directivity, and cross-polarization. The antenna is constructed on a 70 mm × 50 mm with FR4 epoxy dielectric substrate; switch scale of 0.8 mm × 1.6 mm and 3.58 is relative permittivity with substratum height of 1.6 mm.