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4 Results Found

  • Article
  • Open Access
1 Citations
1,079 Views
10 Pages

29 November 2025

In this article, two wideband high-efficiency Class-J power amplifiers operating in X and Ku bands, respectively, are designed based on continuous mode. The optimal impedance regions of the transistors are determined using harmonic load-pull techniqu...

(This article belongs to the Special Issue Broadband Terahertz Devices and Communication Technologies, 2nd Edition)
  • Article
  • Open Access
7 Citations
3,829 Views
15 Pages

17 August 2023

This paper presents two power amplifiers designed for 5G NR n77 and n78 bands. These power amplifiers were fabricated using WINTM Semiconductors’ 0.25 μm GaN/SiC technology and GaAs IPD technology. To achieve a reduction in costs, GaAs IPD t...

(This article belongs to the Section Microwave and Wireless Communications)
  • Article
  • Open Access
10 Citations
2,342 Views
12 Pages

A 2.0–3.0 GHz GaN HEMT-Based High-Efficiency Rectifier Using Class-EFJ Operating Mode

  • Chenlu Wang,
  • Junyi Luo,
  • Zhiwei Zhang,
  • Chao Gu and ,
  • Haipeng Zhu and
  • Luyu Zhang
  • + 1 author+ 0 author

In this paper, a CGH40010F GaN-based wideband RF rectifier with high rectification efficiency is presented. A novel continuous class-EFJ-mode rectifier is constructed by combining a continuous class-J-mode rectifier and class-EF-mode rectifier under...

(This article belongs to the Special Issue Recent Advances in RF Rectifying Technology for EM Energy Harvesting and Wireless Power Transfer)
  • Communication
  • Open Access
3 Citations
3,158 Views
11 Pages

Analysis of Three Species of Cassipourea Traditionally Used for Hypermelanosis in Selected Provinces in South Africa

  • Nomakhosi Mpofana,
  • Masande Yalo,
  • Nceba Gqaleni,
  • Ncoza Cordelia Dlova and
  • Ahmed A. Hussein

23 December 2023

There is a growing demand and use of herbal cosmetics for skin purposes due to their perceived safety when applied to the skin. Three Cassipourea species commonly known as “ummemezi” are used interchangeably by women in rural areas of Eas...

(This article belongs to the Special Issue Molecular Studies of Natural Compounds and Plant Extracts)