Millimeter-Wave and Terahertz Technology

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 3668

Special Issue Editors

Beijing Key Laboratory of Millimeter Wave and Terahertz Techniques, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
Interests: millimeter-wave; radar; radar imaging

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Co-Guest Editor
Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
Interests: solid-state terahertz detectors/mixers, emitters, modulators and terahertz applications; nanoelectronic and nanoelectromechanical devices for high frequency and high sensitivity applications; measurement techniques and instrumentation

E-Mail Website
Co-Guest Editor
School of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China
Interests: milimeter wave; waveguide filters

Special Issue Information

Dear Colleagues,

In recent years, significant strides have been made toward the realization of millimeter-wave and terahertz systems, especially in imaging and ultra-broadband communication applications. However, they still face the problems of insufficient transmission power, limited sensitivity, and low system integration. A variety of new approaches are being pursued to improve the responsivity of detectors, as well as the efficiency of antennas and amplifiers. Meanwhile, arrayed detectors and transmitters are being developed to increase the detection gain and facilitate beam-steering/forming capabilities.

The advances in silicon-based integration technology and the improvement of the HEMT process, with a higher machining accuracy and 2DEG density, make high-performance terahertz detection arrays and transceiver systems achievable, and enable a variety of interesting and valuable applications.

This Special Issue aims to demonstrate recent progress in detectors, antennas, and transceiver circuits based on silicon/HEMT/MEMS technologies, and on arrays for security imaging, non-destructive inspection applications, etc.

Dr. Houjun Sun
Dr. Hua Qin
Dr. Yu Xiao
Guest Editors

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Keywords

  • millimeter-wave and terahertz arrays for security imaging systems
  • millimeter-wave and terahertz radar for industrial applications
  • millimeter-wave and terahertz solid-state power amplifiers
  • waveguide antenna array beyond W-band
  • high-sensitivity terahertz receiving chains and systems

Published Papers (2 papers)

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Research

17 pages, 6101 KiB  
Article
Analysis of the Effect of Antenna Pointing Error Caused by Satellite Perturbation on Space Terahertz Communication
by Yuanzhi He and Chensheng Ma
Appl. Sci. 2022, 12(21), 10772; https://doi.org/10.3390/app122110772 - 24 Oct 2022
Cited by 2 | Viewed by 1724
Abstract
The terahertz frequency band has the advantages of having a large bandwidth, narrow beam, strong penetration, and high security, and is an important direction for the frequency expansion of next-generation satellite communications. Due to the narrow terahertz beam, the pointing error caused by [...] Read more.
The terahertz frequency band has the advantages of having a large bandwidth, narrow beam, strong penetration, and high security, and is an important direction for the frequency expansion of next-generation satellite communications. Due to the narrow terahertz beam, the pointing error caused by satellite perturbation will affect the attenuation of the terahertz wave power, resulting in a decrease in the received power of the system and affecting the communication performance of the system. In order to accurately analyze the influence of pointing error caused by satellite perturbation on the performance of space terahertz communication system, based on satellite perturbation model and Gaussian channel model, this paper deduces the accurate analysis of signal power attenuation model without pointing error and with pointing error untie. The antenna pointing error in the real environment is simulated by using the TLE data of the actual satellite, and the influence of the pointing error on the space terahertz communication is analyzed. The results show that the antenna pointing error caused by satellite perturbation changes periodically with the operation of the satellite, which will cause great signal power attenuation, reduce the signal-to-noise ratio of the space terahertz communication system, and seriously affect the communication quality. In addition, the higher the frequency, the greater the impact on space terahertz communication, which needs to be solved through attitude control and antenna compensation. Full article
(This article belongs to the Special Issue Millimeter-Wave and Terahertz Technology)
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9 pages, 1513 KiB  
Article
Broadband Dielectric Characterization of High-Permittivity Rogers Substrates via Terahertz Time-Domain Spectroscopy in Reflection Mode
by Walter Fuscaldo, Francesco Maita, Luca Maiolo, Romeo Beccherelli and Dimitrios C. Zografopoulos
Appl. Sci. 2022, 12(16), 8259; https://doi.org/10.3390/app12168259 - 18 Aug 2022
Cited by 5 | Viewed by 1552
Abstract
We report the dielectric characterization of three commercially available, high-permittivity Rogers laminates in the sub-terahertz range, by means of terahertz time-domain spectroscopy measurements in reflection mode. A transmission-line model is developed to obtain the reflectance spectra as a function of the frequency-dispersive complex [...] Read more.
We report the dielectric characterization of three commercially available, high-permittivity Rogers laminates in the sub-terahertz range, by means of terahertz time-domain spectroscopy measurements in reflection mode. A transmission-line model is developed to obtain the reflectance spectra as a function of the frequency-dispersive complex relative permittivity of the substrates. The latter is fitted through optimization to a single Lorentzian term, which is shown to accurately reproduce the measured reflectance spectra. The substrates RO3010 and RT/duroid 6010.2LM exhibit significant frequency dispersion of both their relative permittivity and loss tangent. Conversely, the thermoset microwave laminate TMM10i is characterized by both a lower frequency dispersion and overall dielectric losses, thus making it a promising candidate for the design of low-profile and broadband components for novel terahertz applications. Owing to the simple Lorentzian dispersion model used for the description of the relative permittivity, the presented results can serve as a reference, and they can be directly introduced in design and optimization workflows for novel devices in emerging terahertz applications. Full article
(This article belongs to the Special Issue Millimeter-Wave and Terahertz Technology)
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