This letter presents a compact 2.45 GHz broadband
rectenna using the grounded coplanar waveguide (GCPW). A new
broadband slot antenna fed by GCPW with a high gain of 10 dBi
and a wide half-power beamwidth of 60 is designed as the receiving
antenna. By designing an input and an output impedance
match network, a compact GCPW rectifying circuit based on the
voltage doubler principle is proposed, which has broadband performance
and is easy to be integrated with the novel GCPW antenna.
The receiving antenna and the rectifying circuit are simulated
and measured. The measured results of the rectenna agree
well with those of the rectifying circuit, which validate the effectiveness
of the design. The microwave-direct current (mw-dc) conversion
efficiencies of the rectenna keep higher than 50% within the
band from 2.2 to 2.6 GHz at 13 dBm received power on a
load, and the highest efficiency is 72.5%. This rectenna has good
performances of broadband, high mw-dc efficiency and compact
structure.
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