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View article: 8-W 2-Stage GaN Doherty Power Amplifier Module on 7 × 7 QFN for the 5G N78 Band
8-W 2-Stage GaN Doherty Power Amplifier Module on 7 × 7 QFN for the 5G N78 Band Open
This paper presents a 2-stage GaN Doherty power amplifier module (DPAM) on a compact 7×7 quad flat no-lead (QFN) package, designed for the needs of 5G massive MIMO base transceiver systems. The interstage and input matching networks employ…
View article: Highly Linear 2.6 GHz Band InGaP/GaAs HBT Power Amplifier IC Using a Dynamic Predistorter
Highly Linear 2.6 GHz Band InGaP/GaAs HBT Power Amplifier IC Using a Dynamic Predistorter Open
This paper presents a highly linear two-stage InGaP/GaAs power amplifier integrated circuit (PAIC) using a dynamic predistorter for 5G small-cell applications. The proposed predistorter, based on a diode-connected transistor, utilizes a su…
View article: Bandwidth Extension of the Doherty Power Amplifier Using the Impedance Distribution and Control Circuit for the Post-Matching Network
Bandwidth Extension of the Doherty Power Amplifier Using the Impedance Distribution and Control Circuit for the Post-Matching Network Open
Owing to the high impedance transformation ratio, the Doherty power amplifier (DPA) with a large output power back-off generally has bandwidth limitations. This study proposes an asymmetric DPA with an impedance distribution and control ci…
View article: 60 W Class-E/F<sub>3</sub> Switching Power Amplifier With an Improved Second Harmonic Distortion of −49 dBc
60 W Class-E/F<sub>3</sub> Switching Power Amplifier With an Improved Second Harmonic Distortion of −49 dBc Open
This paper presents a Class-E/F3 switching power amplifier (SPA) with reduced second harmonic leakage using parallel resonant circuit in series for the second harmonics. The proposed Class-E/F3 SPA has a structure utilizing a series resona…
View article: Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction
Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction Open
In this paper, we present a high-efficiency wireless power transfer system with design and measurements, for three different types of receivers. The transmitter for the system uses a Class E/F3 power amplifier with second harmonic reductio…
View article: New Load Modulation Combiner Having a Capability of Back-Off Control for Doherty Power Amplifiers
New Load Modulation Combiner Having a Capability of Back-Off Control for Doherty Power Amplifiers Open
A new load modulation combiner (LMC) having the capability of back-off control is proposed for a Doherty power amplifier (DPA). The proposed LMC consists of two transmission lines tied at the combining node, and a shunt element across the …
View article: Broadband Virtual-Stub Doherty Power Amplifier Using Asymmetric Structure
Broadband Virtual-Stub Doherty Power Amplifier Using Asymmetric Structure Open
The load networks of advanced Doherty power amplifiers (DPAs) have traditionally been designed according to the ABCD parameters. In this paper, design conditions as an impedance transformation condition and an effective electrical length w…
View article: New Compact Load Network for Doherty Power Amplifiers Based on L-Section Matching Network of the Carrier Amplifier and Post-Matching Network
New Compact Load Network for Doherty Power Amplifiers Based on L-Section Matching Network of the Carrier Amplifier and Post-Matching Network Open
This paper presents a new compact load network for Doherty power amplifiers (DPAs) with only two matching networks, such as an output matching network of the carrier amplifier, and the post-matching network (PMN), even in the presence of p…
View article: 6.78-MHz Class E Power Amplifier with Low Output Power Variation against the Load Impedance Variation
6.78-MHz Class E Power Amplifier with Low Output Power Variation against the Load Impedance Variation Open
A power amplifier structure is presented that has a low output power variation against the load impedance variation at 6.78 MHz using two Class E power amplifiers and a λ/4 transmission line. A Class E amplifier with a low output impedance…
View article: Compact Load Network Having a Controlled Electrical Length for Doherty Power Amplifier
Compact Load Network Having a Controlled Electrical Length for Doherty Power Amplifier Open
The load network of the carrier amplifier for the conventional Doherty power amplifier (DPA) consists of an impedance matching circuit, an offset line, and a /4 transmission line (TL), so that the overall electrical length of the network c…
View article: Generalized Expression and Design Method of Modified Load Networks for Doherty Power Amplifier With Extended Back-Off Range
Generalized Expression and Design Method of Modified Load Networks for Doherty Power Amplifier With Extended Back-Off Range Open
This paper presents a generalized expression of the modified load networks (MLNs) for Doherty power amplifiers (DPAs) with an extended output power back-off (OBO) range. Based on the analysis using this new expression, a new circuit struct…
View article: 5.8 GHz 4-Channel Beamforming Tx IC for Microwave Power Transfer
5.8 GHz 4-Channel Beamforming Tx IC for Microwave Power Transfer Open
The microwave power transfer (MPT) system requires a massive Tx array for building a focused radio wave to efficiently transfer power to the Rx. Beamforming IC is one of the core elements for the massive Tx array. This paper presents a 5.8…
View article: Correction to “5.8 GHz 4-Channel Beamforming Tx IC for Microwave Power Transfer”
Correction to “5.8 GHz 4-Channel Beamforming Tx IC for Microwave Power Transfer” Open
In the above article [1], the received power in dc referred from the reference [2], which is the reference [35] in the original article [1], was incorrectly introduced. It was written as 0.2 W (dc) in the introduction of [1], but the corre…
View article: Wideband Asymmetric 0.6～1.0 GHz Doherty Power Amplifier with Parallel Resonance Circuit for Peaking Amplifier
Wideband Asymmetric 0.6～1.0 GHz Doherty Power Amplifier with Parallel Resonance Circuit for Peaking Amplifier Open
A broadband asymmetric Doherty power amplifier employing a parallel resonant circuit including parasitic components of the transistor is described herein. The output network of the carrier amplifier constitutes a 75 Ω∠90° λ/4 impedance con…