Concurrent dual-band power amplifiers (PAs) often experience significant efficiency degradation due to the strong baseband components generated under two-tone excitation. Conventional wisdom dictates ...
This work presents a new coupler that unleashes an advanced load-modulation architecture, the Load-Modulated Hexagonal-Coupler-based Power Amplifier (LMHA), designed to extend the power back-off (PBO)...
This paper presents a broadband impedance matching technique for RF power amplifiers based on a single quarterwave transmission line (QTL) used with multiple resonance circuits. It is demonstrated how...
This paper presents a new class of load-modulated power amplifiers (PAs), named as the inverse-balun load-modulated power amplifier (IBMA). For the first time, it is discovered that one coupled-line-b...
This paper presents a two-tier, low-complexity linearization framework for fully digital multiple-input multiple-output (MIMO) transmitters that jointly minimizes total radiated power–adjacent channel...
This work investigates receiver linearization in a four-antenna multiple-input multiple-output (MIMO) system operating in the presence of a strong blocker. The received signals are first spatially com...
This work presents a one-step or one-stage over-the-air (OTA) digital predistortion (DPD) method for millimeter-wave phased-array transmitters that inherently accounts for mutual coupling and power am...
This paper presents a novel adaptive impedance compensation technique for broadband linearity enhancement of Doherty power amplifiers. By incorporating a power-related tunable network with varactor-li...
This work presents an analog pre-distortion (APD) linearizer that employs a piecewise linear shape to accurately approximate the nonlinear inverse characteristics of a power amplifier (PA). The APD am...
This article presents a 6-way Gysel power combiner (PC) for high-power applications in rectangular coaxial guide (rectax). Compared to corporate and radial power combiners, the proposed Gysel PC achie...