A Novel High-Temperature Stable Antenna with Omnidirectional radiation pattern

Novel high-temperature stable antenna with reliable structure is presented in this communication. The antenna is excited by a coaxial line which can adapt high-temperature within 350 °C. The height of the antenna is only 0.26λ (where λ is the wavelength at the centre frequency). A parametric study is performed for providing practical design guidelines The simulation and measured results show that an impedance bandwidth for VSWR ≤ 2.0 from 2.1GHz to 4.8GHz was covered. Stable radiation pattern is found among the working frequencies. The antenna works stably at 350 °C with the protection of heat shield cover plate and demonstrates excellent heat-resisting property, while the surface temperature of the antenna reaches 280 °C.