Design of multi utility multi band microstrip calculator shaped patch antenna using coaxial feed

Abstract

This paper demonstrates the structure and the result characterization of a multi band microstrip patch antenna closely resembling Microsoft Calculator Accessory logo. This antenna is intended to be used for several applications. The substrate used is FR4 epoxy substrate with a relative permittivity of 4.4, dielectric loss tangent of 0.002 and a thickness of 1.6 mm. The design uses a probe feeding mechanism owing to numerous advantages offered by it. The simulation software used is HFSS (High Frequency Structure Simulator). The structure resonates at 6 different frequencies including 1.2 GHz offering a reflection coefficient of −24.9 dB and a bandwidth of 47 MHz for aeronautical radio navigation, 1.53 GHz with a reflection coefficient of −16.9 dB and a bandwidth of 74.2 MHz for satellite communication, 2.56 GHz with a reflection coefficient of −29.7 dB and bandwidth of 121.7 MHz for wireless communication, 1.962 dB at 3.27 GHz with a reflection coefficient of −12.3 dB and a bandwidth of 62.7 MHz for private land mobile devices, 3.89 GHz with a reflection coefficient of −13.4 dB and a bandwidth of 68.4 MHz for fixed microwave devices and 5.91 GHz with a reflection coefficient of −17.3 dB and a bandwidth of 340 MHz for ISM equipment, personal land mobile, personal radio and amateur radio.