Compact Tri-Band Antenna With Double Winding Structures for 3G/4G/5G Base Station Applications

Abstract This paper introduces a compact triband antenna fed by a coplanar waveguide (CPW) for 3G/4G/5G base station applications with an ability to attain reversibility of transformer operation. The newly presented design provides Step-up and step-down transformer operation with double winding structures on either side of the central resonator. The antenna design is attained through methodical design procedures accompanied by thorough analysis for the development of prototypes rapidly. The proposed compact triband antenna performance is evaluated for both with and without windings in the antenna structure. The proposed design without the winding structure achieves a dual band of operation whereas the design with a winding structure achieves tri-band operation with improved S11 performance and very less VSWR. Two prototypes of triband UWB antenna with double winding structures of high design specifications are fabricated and tested to validate the proposed design principle. The effectiveness of the projected design is evident from the excellent association between simulated and measured results. It is shown that the proposed design is very effective with low cost and the fabricated prototypes of the antenna with double winding structures are very compact with the dimensions of 18.6 X 15.6 mm2 achieving three frequency bands of operations at 2.9 GHz,