Ultra-Wideband Rectenna Using Complementary Resonant Structure for Microwave Power Transmission and Energy Harvesting

Ping Lu, Chaoyun Song, Ka Ma Huang

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)
236 Downloads (Pure)


An ultra-wideband (UWB) rectenna (fractional bandwidth >100%) using a novel wideband complementary matching stub is proposed for microwave power transmission and energy harvesting. A simple resonant structure, i.e., LC series-parallel resonant circuit, is embedded to the L-shaped complementary matching stub. Due to the unique frequency response of the LC resonant circuit, the proposed matching stub can exhibit 'open' and 'short' circuits as a function of frequency, thereby acting as a complementary matching circuit covering a relatively wide frequency range. Having utilized the proposed matching stub, the nonlinear input impedance of the rectifier can be tuned to conjugately match the antenna impedance throughout the frequency band of interest. Simulated and measured results show that the proposed rectenna has good matching performance (S11 <-10 dB) and high RF-dc conversion efficiency (>50%) over a relatively wide frequency range from 0.9 to 3 GHz (for GSM, Wi-Fi, and WLAN bands). The maximum conversion efficiency of 73.4% is realized at 3-dBm input power. It is evident that the proposed resonant structure-based matching scheme is a promising and effective solution to facilitate the UWB rectenna design with stably high efficiency over a very wide frequency band.

Original languageEnglish
Pages (from-to)3452-3462
Number of pages11
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number7
Early online date31 Mar 2021
Publication statusPublished - Jul 2021


  • Broadband rectenna
  • complementary matching stub
  • microwave power transmission
  • resonant structure
  • ultra-wideband (UWB).

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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