Design of Glass-Integrated Grid Antenna Using CMA for Multiband Indoor Network

Integrate the antenna with the inherent glass structure of the buildings is a method of optimising the deployment of indoor base station. A triple-band glass-integrated grid antenna for indoor communications is presented in this paper. The antenna consists of three concentric square grid structures and is integrated into glass. With the help of characteristic modes analysis (CMA), three optimum operating modes are obtained and excited with single feeding, each resonant frequency can be tuned independently. To demonstrate the concept, a design for GSM at 1.8 GHz, WLAN at 2.4 GHz and low-frequency band for 5G at 3.5 GHz is provided.