A Self-Biased Receiver System Using the Active Integrated Antenna

Sang-Min HAN  Ji-Yong PARK  Tatsuo ITOH  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.2   pp.570-575
Publication Date: 2006/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.2.570
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
active integrated antennas,  rectennas,  multi-functional systems,  microwave power transmission,  

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A simple self-biased receiver system with a dual branch architecture consisting of a low-power consumption receiver and a rectenna is introduced. The system is efficiently integrated with a dual-fed circular sector antenna with harmonic rejection characteristics without a BPF. The receiver portion is designed by utilizing a low-noise amplifier (LNA) with low power consumption and a self-heterodyne mixer, while the rectenna achieves high conversion efficiency up to 80%, thanks to the harmonic rejection of the circular sector antenna. The rectified DC power from the rectenna is applied for a bias of the receiver without any external bias. Simultaneously, an ASK digital signal demodulation without an extra power supply are implemented successfully.