This paper presents a dual-band RF rectifying circuit for wireless power transmission at 1.17 GHz and 2.4 GHz. A dual-band harmonic-tuned inverse-class F/class-F mode power amplifier using a 10 W GaN device has been utilized to implement the proposed rectifier with an on-board coupler and phase shifter. The matching circuit is precisely designed so that the circuit operates in inverse class F and class F mode in the lower and upper frequency bands using dual-band harmonic tuning, respectively. Measurement results show that the rectifier circuit has 78% and 76% efficiencies at 1.17 GHz and 2.4 GHz frequency bands, respectively. To the best of the authors' knowledge, this rectifier is the first demonstration of a dual-band harmonic-tuned synchronous rectifier using a GaN HEMT device with an integrated coupler and phase-shifter for a watt-level RF input power.
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This content will become publicly available on June 1, 2025
A Dual-Path Transformer-Based Multiband Power Amplifier for mm-Wave 5G Applications
This article presents a dual-band power amplifier
for 28 and 39 GHz frequency bands based on a new dual-path
transformer (DPT). This DPT can provide two optimum inductive
values at two different frequency bands to optimally design
the matching networks for each band without using any switch
circuitries. It operates as the output and input matching networks
in a parallel power combiner and divider, respectively. DPT-based
PA breaks the trade-off between bandwidth and performance in
conventional wideband PAs by separating one whole wideband
into two narrow bands providing optimum input and output
matchings for each band. The DPT-based PA has two input and
two output ports. One set of input and output ports is dedicated to
a lower frequency band and the other set of input and outport
ports can be used for a higher frequency band. Each output
port can drive a separate antenna in a phased array for each
frequency band. The proposed PA prototype is fabricated in a
65 nm CMOS process achieving 15.3 and 14.0 dBm of saturated
output power in 28 and 39 GHz. The peak efficiency of the PA
is 34.1% and 30.2% at 28 and 39 GHz frequency bands. The PA
has a measured EVM with 64-QAM modulated signal in both
frequency bands showing −25.03 and −25.10 dB in the low and
higher frequency bands, respectively.
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- PAR ID:
- 10538248
- Publisher / Repository:
- Institute of Electrical and Electronics Engineers
- Date Published:
- Journal Name:
- IEEE Journal of Solid-State Circuits
- Volume:
- 59
- Issue:
- 6
- ISSN:
- 0018-9200
- Page Range / eLocation ID:
- 1643 to 1655
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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