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\title{Compact Dual-Band Rectifier with Self-Matched Branches Using
Comprehensive Impedance Control}



\author[1]{Adel Barakat}%
\author[1]{Ramesh K Pokharel}%
\author[2]{Willy Jordan}%
\affil[1]{Affiliation not available}%
\affil[2]{Kyushu University}%


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  \date{April 29, 2026}


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\begin{abstract}
The use of multi-band matching for rectifiers leads to design
complexity. Instead, recent advancements suggested self-matched branches
combined in parallel to enable multiband operation. However, this method
controls only the imaginary part. In this letter, we propose an
efficient dual-band rectifier with compact realization. The rectifier
consists of two self-matched parallel branches. Each branch provides
comprehensive impedance control over real and imaginary parts in the
corresponding band independent of the design frequency. The branch
impedance matching is analyzed theoretically, and design equations are
presented. To verify the proposed theory, a compact dual-band rectifier
was fabricated with a compact area of only 0.42 cm2 after excluding the
area required for the RF connector. The measured RF-DC power conversion
efficiency (PCE) was \textgreater{} 50\% for input power (???) ranging
from -5.5 dBm to 11 dBm at 390 MHz with a peak of 69\%. Also, the PCE
was \textgreater{} 50\% for ??? ranging from -4 dBm to 12 dBm at 690 MHz
with a peak of 68\%. The fabricated rectifier operates with a wide load
range from 0.5 K\selectlanguage{greek}Ω \selectlanguage{english}to 3 K\selectlanguage{greek}Ω \selectlanguage{english}with PCE \textgreater{} 50\% at both bands
when ??? = ? dBm.%
\end{abstract}%



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