Key Laboratory of Ministry of Education for Design and Electromagnetic Compatibility of High Speed Electronics Systems, Shanghai Jiao Tong University, Shanghai, China
Hong-Li Peng
Key Laboratory of Ministry of Education for Design and Electromagnetic Compatibility of High Speed Electronics Systems, Shanghai Jiao Tong University, Shanghai, China
Changli Sun
Center for Opto-electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai, China
Jian-Gang Lu
Center for Opto-electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai, China
Yaoping Zhang
Key Laboratory of Ministry of Education for Design and Electromagnetic Compatibility of High Speed Electronics Systems, Shanghai Jiao Tong University, Shanghai, China
Wen-Yan Yin
Key Laboratory of Ministry of Education for Design and Electromagnetic Compatibility of High Speed Electronics Systems, Shanghai Jiao Tong University, Shanghai, China
A differential probe-fed liquid crystal (LC)-based frequency tunable circular-ring patch antenna is presented. Besides, cavity model is extended to analyze the LC-based antenna for the differential operation. According to the cavity model, the permittivity and loss tangent of the LC are extracted from the measured differential reflection coefficients. Acceptable agreements among the measurement, simulation, and calculation for differential impedances, reflection coefficients, and radiation patterns are obtained and also validate the extraction method and model. More importantly, the extended cavity model can provide a deep physical insight into the LC-based antenna.
