Design of T/R Module for Far-Field WPT Applications with Third Harmonic Receiver Tracking System

An advanced T/R module architecture for farfield wireless power transfer (WPT) application is proposed in this paper. In order to eliminate the alignment mismatch and correspondingly to increase the overall efficiency, third harmonic receiver tracking feature is employed in the proposed T/R module. Here, the T/R module transmit the power at 2.45 GHz and receives the feedback power at 7.35 GHz for direction estimation and precise alignment between the T/R module and the power seeking node (PSN). To realize compact PCB of the T/R module, coplanar waveguide matching is incorporated. Proposed architecture is simulated in SystemVue software and the complete link budget analysis shows that the realized WPT system can be used for indoor applications up to 2 meters.