Unbalanced Power Amplifier with Back-off Efficiency Enhancement

• Novel unbalanced PA architecture based on asymmetric couplers

• Enhanced back-off efficiency over a broad bandwidth

• Superior broadband performance compared to conventional Doherty amplifiers

• Publication: IEEE JSSC 2020

Power Amplifier Using Minimum-Inductance Filter Matching 

• Broadband PA using a minimum-inductance filter matching network

• Compact matching network for highly integrated RF circuits

• High efficiency over 2-4 GHz bandwidth

• Publications: IEEE TCAS-I 2020  IEEE ESSCIRC 2019

Oscillators Using Magnetic Coupled Series-Parallel Resonators

• Oscillators based on magnetic coupled series-parallel resonators

• High-order tanks with enhanced quality factor

• Lower phase noise with small increase in power consumption

Distributed Amplifier with Transformer-Coupled Input and Output Lines

• Distributed LNA with transformer-coupled input-output transmission lines

• Wideband cancellation of transistors gate-drain capacitance

• Measured bandwidth close to 40 GHz

• Publication: IEEE TMTT 2014

Tapered Distributed Low-Noise Amplifier

• Tapered distributed LNA architecture 

• Scaling the width of transistors and the inductance of the gate and drain lines

• The average noise figure reduced by 1 dB across 40-GHz bandwidth

• Publication: IEEE TCAS-II 2018

Power Amplifier Using Multi-Resonance Harmonic Matching Network

• PA with a multi-resonance harmonic matching network 

• Broadband operation in continuous class-F mode across a broad bandwdith

• Design for wide bandwidth, low insertion loss, and optimum load impedance

• Publication: IEEE TCAS-I 2022

Doherty Power Amplifier Using Transformer Load Modulation Network

• Doherty PA using a broadband transformer-based load modulation network 

• Load modulation network comprising edge-coupled transmission lines

• Compensation of output parasitic capacitance of the main and auxiliary transistors

• Publication: IEEE Access 2019

Millimeter-Wave Harmonic-Tuned Frequency Multiplier

• Frequency doubler for 30 GHz to 60 GHz conversion

• Harmonic-tuned output network for class-F operation 

• High conversion efficiency

Gain-Boosted Transformer-Feedback Millimeter-Wave Dual-Band Amplifier

• Amplifier with multi-resonance transformer-feedback networks

• Cancelling gate-drain capaciatnce of transistor at two concurrent bands 

• Feedback in both the first and second amplifier stages

• High gain and reverse isolation at 27 and 33 GHz

• Publication: IEEE TCAS-II 2017

Reconfigurable Multi-Mode Harmonic-Tuned Power Amplifier

• Reconfigurable quad-mode power amplifier

• PA comprising one main amplifier and three auxiliary amplifiers

• Class-F23 operation using harmonic matching network

• Improved efficiency and linearity for complex modulated signals

• Publication: IEEE SSCL 2020

Broadband Millimeter-Wave LNA with Dual Transformer Feedback

• Broadband mm-wave LNA using dual transformer feedback 

• Feedback for cancelling the inter-stage parasitic capacitance to extend bandwidth

• Feedback applied in the interface of the first-second and second-third amplifier stages

• Publication: IEEE TMTT 2014

Millimeter-Wave LNA with Bandwidth and Linearity Enhancement

• LNA with two feedback networks in the last stage to extend bandwidth

• Transistor width tapering to enhance linearity of the LNA 

• LNA operating across 20-40 GHz bandwidth

• Publication: IEEE MWCL 2016

Multi-Watt RF Power Amplifier

• RF power amplifier with a crossbar power combing structure 

• Multi-watt output power in a compact chip area

• Extensive electromagnetic (EM) simulations for parastics and coupling effects

• Publication: IEEE TMTT 2013

Multi-Watt RF Power Amplifier

• RF power amplifier with a tree power combing structure 

• Multi-watt output power and high efficiency

• Second-harmonic trap embedded in the inter-stage matching to improve efficiency 

• Extensive electromagnetic (EM) simulations for parastics and coupling effects 

• Publication: IEEE TMTT 2013

Power Amplifier with Output and Input Harmonic Termination

• Power amplifier with harmonic termination networks at output and input

• Termination for arbitrary number of harmonics using minimum circuit elements

• High efficiency by terminating the first five harmonics at the output and the first three harmonics at the input

• Publication: IEEE TMTT 2014