On Wireless Power Transfer Design Rectenna Circuit at 3.45GHz Suitable for Biasing 5G/FR1 Front-End Receivers

This paper presents the results of a wireless power transfer (WPT) rectifier connected to an antenna (rectenna), suitable to bias the front-end of a 5G receiver at FR1 frequency band. A patch antenna has been designed to receive the RF power at 3.45 GHz (Sub 6 GHz band), while the rectification process is based on a full wave voltage doubler rectifier. The matching circuit between the patch antenna and the rectifier is tuned for maximum power transfer with a varying load between 1kOhm to 5kOhm. When the antenna receives a power of - 10dBm, the rectifier produces a corresponding DC voltage of one Volt with an RF to DC power conversion efficiency of 38 The rectenna circuit is studied and designed using the PathWave Advanced Design System (ADS) tool. The proposed design fully covers the power needs of an RF front-end receiver at FR1 and paves the way for other practical implementations in various wireless energy harvesting applications.