Flexible Dual-Frequency Circularly Polarized Antenna

A flexible dual-frequency circularly polarized antenna with a flexible material polydimethylsiloxane (PDMS) as the dielectric substrate and metallic copper as the radiation patch is proposed, which has the characteristics of being easy to conform to the curved surface. The antenna uses a double layer of dielectric substrate, and uses two layers of metal patches to achieve dual frequency resonance. The feed uses a dual coaxial mode to form circular polarization radiation, and opening a cross slot on the upper radiation patch reduces the antenna size. The performance of the electromagnetic simulation software Ansoft HFSS is simulated and optimized. The simulation results show that the antenna can work in the S band of 2.5GHz and 3.5GHz, the gain is more than 3dB, and has good radiation directivity. The antenna is planned to be processed based on Micro-Electro Mechanical Systems (MEMS) processing technology. Compared with the conventional dual-frequency circularly polarized antenna, the antenna is made of flexible material as the medium substrate, which can adapt to mechanical stress such as tensile and bending. It has a good application prospect and provides a reference for the integration of antenna and electronic equipment.