Effects of Temperature Variations on Microstrip Antenna

Present paper describes the effects of temperature variations on the performances of rectangular patch antenna exposed to different temperatures. The antenna is designed at room temperature 300 0K with operating frequency 2.45 GHz and bandwidth 0.0518 GHz, return loss -21.83 dB and impedance 50 ohms are observed. When the temperature is decreased the value of frequency, bandwidth and impedance reduce up to 2.01 GHz, 0.0272 GHz and 35.95 ohm respectively and return loss of antenna is increased up to -13.46 dB. However if temperature is increased the value of frequency, bandwidth and impedance of antenna reduce up to 1.96 GHz, 0.0272 GHz, and 35.05 ohm respectively and return loss of antenna is increase up to -12.61 dB. Bandwidth of the antenna shows a negligible change while impedance reduces when temperature rise.