A class E GaN microwave power amplifier accounting for parasitic inductance of transistor

Shi

et al. 2022

This paper presents a multi-octave class-EFJ power amplifier based on a compact coupling structure. The compact coupling structure derives the output matching network impedance which is a simplified Ttype network. The compact coupling structure reduces the output matching impedance range to meet the impedance requirement of the class-EFJ power amplifier. This coupling structure can meet the design space of the optimal fundamental impedance and control the harmonic matching impedance. Compared with the traditional design method, this design method can meet the requirement of the miniaturization and improve the efficiency in a wide bandwidth. In order to improve the efficiency and broaden the bandwidth, the input matching network is used a stepped impedance and open circuit microwave line matching method. To verify the proposed structure effectiveness, a multi-octave bandwidth and high efficiency PA is designed and fabricated with a GaN HEMT CGH40010F. The measured results show that the output power of 40.2dBm to 42.9dBm and the drain efficiency of 62.8%-72.4% are achieved at 0.9GHz-3.4GHz, respectively.

Section: Introductionmentioning

confidence: 99%

Ultra-broadband high efficiency class-EFJ power amplifier with a compact coupling matching structure

Jia

Shi

et al. 2022

“…Therefore, the broadband and high efficiency are desired simultaneously. Various switch mode PAs are studied, especially class E [3,4,5,6,7,8,9,10,11,12,13,14] and class F [15,16,17,18,19,20,21] PAs. Class-E PA is utilized for designing broadband and high efficiency PA, but its parallel capacitor cannot be fully charged or discharged to generate the ideal drain waveforms, leading to an efficiency degradation [22].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient broadband continuous Class-F power amplifier with a novel harmonic matching network

Jia

Dai

et al. 2022

In this letter, we propose a methodology for designing high efficiency broadband harmonic-controlled power amplifiers(PAs)with a novel harmonic matching network. This network consists of three secondharmonic open circuit microwave lines and three third-harmonic short circuit microwave lines, each corresponding to different wavelengths for different frequencies. It can improve the efficiency and bandwidth of PAs by controlling harmonic match impedance. Through the proposed network, we design and fabricate a highly efficient broadband continuous Class-F PA using a CGH40010F GaN HEMT device. The measurement results show that the drain efficiency of 71.4% to 82.4% (the average efficiency of 76.9%) and output power of 40.4dBm to 42.6dBm are achieved at 1.3GHz-2.5GHz, respectively.

“…Recently, many high-efficiency RF PAs have been reported in [3,4,5,6,7,8,9,10,11]. The traditional harmonic control PAs such as Class F PAs [12,13,14,15] and switch PAs like class E PAs [16,17,18,19] have become the research hotspots because of their ideal 100% drain efficiency. The hybrid class EF PAs presented in [20] have received more and more attention recently for which they have the advantages of both class E and class F PAs.…”

Section: Introductionmentioning

confidence: 99%

Design of broadband Class EF power amplifier based on low-pass filter matching structure

Zhang

Liu

2019

This paper proposes a broadband Class EF power amplifier based on a low-pass filter matching structure. Based on the theory of Class EF power amplifiers, the optimal fundamental load impedance required is derived. A broadband matching circuit is then designed using a low-pass filter prototype. In the meantime, a compact harmonic control circuit is proposed to meet the harmonic impedance requirements of class EF power amplifiers. In order to validate the effectiveness of the proposed method, a 2.6-3.6 GHz broadband class EF power amplifier is designed and fabricated. Measurement results show that the output power is between 40.68 dBm and 41.6 dBm at 1 dB compression point in 2.6-3.6 GHz. From 62% to 78% drain efficiency is obtained with gain greater than 10 dB.