Unraveling Substrate thickness Barrier in 5G Mid-Frequency Antenna Design
Abstract
To integrate with the existing communication modules, an electrically small uniplanar antenna operating at 5G mid-frequency band (3.4 GHz to 3.8 GHz) is designed. FR4 is the commonly used substrate in printed circuit board and its thickness may be 0.8 mm or 1.6 mm. The uniplanar antenna designed for 1.6 mm substrate thickness can be used for 0.8 mm substrate thickness with 0.9 mm increase in feed length. The overall dimension of the designed antenna is 0.274l x 0.204l mm2, where ‘l’ is the resonant frequency at 3.5 GHz. The proposed antenna design in two different substrates provide a fractional bandwidth of 11 % with reasonable gain greater than 2 dBi and radiation efficiency greater than 95 % for the entire operating 5G mid-frequency band.
Keywords:5G mid-frequency band, Antenna, Asymmetric Coplanar Strip, Radiation Efficiency, Slot antenna
