Developing a broadband band‐pass filtering power amplifier with enhanced performance

A new input–output matching structure is presented in this article. The proposed method is used to realize a wideband high‐efficiency power amplifier. By combining the design of input–output matching network with a band‐pass filter, the fundamental and harmonic impedances are transformed to high efficiency region. In this case, a continuous Class‐F PA with wide bandwidth and high efficiency is obtained. Meanwhile, the bias circuit is also integrated in the matching network to simplify the wideband PA topology. After experimental verification, the fabricated PA has a measured drain efficiency of 62.2%–76.5% in the range of 1.35–2.8 GHz, with an output power of 39.1–42 dBm.

Section: Circuit Implementation and Measurement Resultssupporting

confidence: 79%

A wideband power amplifier based on filtering matching for both input and output network

Cai,

Liang,

Gao

et al. 2024

“…Therefore, research on broadband high-efficiency PAs is urgently needed. [1][2][3][4] The theory of harmonic tuning is considered the most effective way to promote the operating efficiency of PAs, for instance Class-F, 5 Continuous Class-F, 6 Continuous Class-B/J, 7 and so on. These typical harmonic tuning modes mainly rely on manipulating the harmonic impedance of the output terminal of the PA to form the waveform of the drain voltage and current, achieving the goal of improving efficiency without considering the impact of source second harmonics caused by the gate source capacitor (C gs ) on the performance of the PA.…”

Section: Introductionmentioning

confidence: 99%

“…However, in terms of the current technological development status of PAs, bandwidth, and efficiency are still the two main technical indicators that constrain further improvement of communication system performance. Therefore, research on broadband high‐efficiency PAs is urgently needed 1–4 …”

Section: Introductionmentioning

confidence: 99%

Design a wideband high‐efficiency continuous class‐GF power amplifier based on a source second harmonic manipulation architecture

Xuan,

Cheng,

Zhang

et al. 2024

In this paper, a novel source second harmonic manipulation architecture achieving second harmonic control at device input is proposed to solve the issue of reduced operating efficiency of power amplifiers (PAs) caused by the input nonlinearity in continuous Class‐GF mode. The key to the proposed architecture lies in the use of a compact multibranch network to match the source second harmonics of the three design frequency points to the short‐circuit state, which can expand bandwidth while avoiding unexpected efficiency degradation. Considering the necessity of theoretical verification, a broadband continuous Class‐GF PA is designed, implemented, and assembled employing a commercially available 10‐W gallium nitride device. The measured results show that a fractional bandwidth of 100% across 1.1–3.3 GHz with a drain efficiency of 62.4%–72.5%, an output power of 40.1–42.2 dBm, and a gain of 10.1–12.2 dBm are achieved under saturated output power.

Design of a Bandpass Continuous Class‐F Filtering Power Amplifier Based on a Terminated Coupled Lines Structure

Wang,

Zhang,

Zhang

et al. 2024

This paper presents a filtered power amplifier (PA) based on the continuous class‐F mode. This broadband filtering PA employs a terminated coupled line structure, which consists of coupled line segments and four terminations loaded on them for obtaining high efficiency over a wide frequency band. Also, a detailed theoretical analysis and calculation of the proposed termination coupling line structure is given. The filter plays the role of filtering and impedance matching simultaneously, and thus high‐order harmonics of the filtering PA are suppressed. For verification, the proposed PA is designed, fabricated, and measured. The measurement results show that a drain efficiency of 60.5%–69.8%, a gain of more than 10 dB, and an output power of 40.2–42.4 dBm are achieved in the target frequency band.