Electrochemical capacitors, also called supercapacitors, store energy using either ion adsorption (electrochemical double layer capacitors) or fast surface redox reactions (pseudo-capacitors).

This article uses a new multi-layer PCB technology to design a low-cost mm-wave circularly polarized broadband antenna array for 5G handsets that operates from 57 to 64 GHz. This band covers many 5G ...

This letter presents a double-layer 45° linearly polarized (LP) wideband and highly efficient transmitarray antenna (TA). The proposed element is composed of two multi-resonant dipoles and four metal ...