Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 2399

Special Issue Editors

1. National Mobile Communications Research Laboratory, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
2. Purple Mountain Laboratories, Nanjing 211111, China
Interests: millimeter wave; massive MIMO; reconfigurable intelligent surface channel measurements and modeling; artificial intelligence; electromagnetic information theory; 6G wireless communications
Special Issues, Collections and Topics in MDPI journals
School of Microelectronics, Shandong University, Jinan 250101, China
Interests: non-stationary wireless MIMO channel modeling; high speed train wireless propagation characterization and modeling; channel modeling for special scenarios

Special Issue Information

Dear Colleagues,

The 6G research has been launched worldwide and has shown a paradigm shift of global coverage, all spectra, full applications, and strong security. To meet the requirements of 6G wireless communication networks, all spectra will be fully explored, including millimeter wave (mmWave) and terahertz (THz) bands. Higher frequency bands can enable higher transmission data rates and increase the resolution ability of joint sensing and communications, as well as imaging. Another merit of higher frequency bands is that more antenna elements can be manufactured in a given space. The new antenna technologies, such as ultra-massive multiple-input multiple-output (MIMO), holographic MIMO, and reconfigurable intelligent surface (RIS) have been well studied. Meanwhile, signal processing, wireless channel measurements, and channel modeling will also be of great importance for 6G developments and applications.

The main objective of this Special Issue is to address the recent advances and future challenges in RF, (sub-)mmWave, and THz technologies and applications. The topics of interest include but are not limited to the following:

  • RF, (sub-)mmWave, and THz sensing and communications
  • RF, (sub-)mmWave, and THz imaging
  • RF, (sub-)mmWave, and THz signal processing
  • RF, (sub-)mmWave, and THz antennas, devices, and circuits
  • Ultra-massive MIMO communications
  • Holographic MIMO communications
  • Reconfigurable intelligent surface communications
  • 6G wireless channel measurements
  • 6G wireless channel modeling

Dr. Jie Huang
Dr. Yu Liu
Guest Editors

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Keywords

  • millimeter wave communications
  • THz communications
  • 6G
  • wireless channel
  • signal processing

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Published Papers (1 paper)

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Research

12 pages, 10028 KiB  
Article
Particle-in-Cell Simulations on High-Efficiency Phase-Locking Millimeter-Wave Magnetrons with Unsynchronized High-Voltage Pulses
by Minsheng Song, Lin Meng, Bin Wang, Liangjie Bi, Yu Qin, Haixia Liu, Liangpin Chen, Yong Yin and Hailong Li
Electronics 2023, 12(16), 3502; https://doi.org/10.3390/electronics12163502 - 18 Aug 2023
Viewed by 1801
Abstract
Phase locking is an essential choice for building a coherent array, and a system of phase-locked magnetrons is relatively compact and cheaper than other microwave sources. Previous theoretical and experimental studies on phase locking are conducted using synchronized high-voltage pulses. Here, we investigate [...] Read more.
Phase locking is an essential choice for building a coherent array, and a system of phase-locked magnetrons is relatively compact and cheaper than other microwave sources. Previous theoretical and experimental studies on phase locking are conducted using synchronized high-voltage pulses. Here, we investigate the characteristics of two phase-locked magnetrons using particle-in-cell (PIC) simulation software (CST STUDIO SUITE 2020) when two high-voltage pulses have delays. The results show that the magnetrons produced two-level RF signals because the operation could be divided into two stages. The first stage happened when one cathode emitted electrons; then, the electrons formed one spoke, traveling in synchronism with the 0-phase difference mode. Two output ports both produced half the output power of a free-running magnetron. The second stage happened after another cathode started to emit electrons, which were instantly pre-modulated by the electromagnetic field of the 0-phase difference mode produced during the first stage. In the second stage, simulations showed that pre-modulation accelerated the process of electron bunching. Eventually, two magnetrons were phase-locked, and the total output power of the two identical magnetrons nearly doubled the output power of the free-running magnetron, which demonstrated that the magnetrons were phase-locked in the high-efficiency phase-locking regime. Full article
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