Low Cost Temperature Controlled Frequency Reconfigurable Antenna with High Selectivity

This paper presents an idea to form a low cost frequency reconfigurable patch antenna based on the temperature change. The use of PET (Polyethylene Terephthalate) material in the substrate gives the flexibility to form a low cost antenna that can work for a range of frequencies. The antenna is flexible and can be used as biological sensors. The use of transparent PET material can have several advantages in terms where transparency is required. The antenna is designed to resonate in K band region. Simple patch antenna is designed with a split ring slot in between to reduce the bandwidth and improve the selectivity, as well as sensitivity of the antenna suitable for controlled reconfigurability in the frequency. At room temperature, antenna resonates at 23.8 GHz, with a gain of 6.16dBi and radiation efficiency of 92.06%. As the temperature increases from room temperature to 100°C, the frequency shifted from 23.8 GHz to 22.66 GHz. Antenna shows a dual band characteristic with equivalent significance of temperature on both the frequency.