Submit to Special Issue Submit Abstract to Special Issue Review for Sensors Edit a Special Issue

Journal Browser

► Journal Browser

Special Issue "Advances in Microwave Communications and Radar Technologies"

Print Special Issue Flyer
Special Issue Editors
Special Issue Information
Published Papers

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Communications".

Deadline for manuscript submissions: 20 November 2023 | Viewed by 4655

Share This Special Issue

Special Issue Editors

Prof. Dr. Artur M. Rydosz

E-Mail Website
Guest Editor

Insitute of Electronics, AGH University of Science and Technology, 30-059 Krakow, Poland
Interests: metal oxide thin films; nanomaterials; gas sensors; acetone detection; exhaled breath analysis
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Maurizio Bozzi

E-Mail Website
Guest Editor

Department of Electrical, Computers and Biomedical Engineering, University of Pavia, 27100 Pavia, Italy
Interests: microwaves; computational electromagnetics; electrical engineering; electromagnetics; microwaves and millimeter-waves

Prof. Dr. Krzysztof Nyka

E-Mail Website
Guest Editor

Department of Microwave and Antenna Engineering, Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
Interests: microwaves; millimeter waves; antennas; wireless communication; computational electromagnetics

Special Issue Information

Dear Colleagues,

The Special Issue will focus on novel developments in microwave and radar techniques, including sensing applications. The papers dealing with measuring, designing, and modeling active and passive microwave circuits are welcome, with special emphasis on those presented at the 24th International Microwave and Radar Conference – MIKON-2022, which is a traditional conference of the Polish microwave community that has been organized since 1969, which turned into the biennial international event in 1994. The conference is held under the auspices of the Polish Academy of Sciences and the Institute of Electrical and Electronics Engineers IEEE:

Sensors, Detectors, and Vehicular Radars;
Antenna Design, Modeling, and Measurements;
RF, VHF, and UHF Technology;
Microwave Measurements;
THz Techniques, Space, and Satellite Systems;
Industrial, Environmental, and Medical Applications;
Active and Passive Devices and Components

Prof. Dr. Artur M. Rydosz
Prof. Dr. Maurizio Bozzi
Prof. Dr. Krzysztof Nyka
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (4 papers)

Download All Papers

Research

Open AccessCommunication

Microwave Frequency Doubler with Improved Stabilization of Output Power

Piotr Kwiatkowski

Michał Knioła

and

Zenon Szczepaniak

Sensors 2023, 23(7), 3598; https://doi.org/10.3390/s23073598 - 30 Mar 2023

Viewed by 606

Abstract

The passive multipliers based on semiconductor diodes, most frequently a Schottky type, should be driven by a certain value of input power, where the conversion losses are optimal. This means that the variation in the input power level causes the change in the output power level. A solution to this issue is the integration of an output power amplifier, which in the state of saturation provides quasi-stabilization of the output power. Practically, this approach gives an unsatisfactory performance: weak stabilization or narrow input power range. This paper comprises a concept of an active frequency multiplier with the use of one FET transistor and a special adaptive bias circuit in order to obtain a very wide input power range when the output power is stable. The principle of the operation, design guidelines, and measurement results have been presented for an example circuit of the frequency doubler. The results show the possibility to obtain up to 10 dB input power range for a 1 dB change in output power level without the use of additional amplifiers. Full article

(This article belongs to the Special Issue Advances in Microwave Communications and Radar Technologies)

► Show Figures

Figure 1

Open AccessArticle

Deep-Learning-Based Antenna Alignment Prediction for Mobile Indoor Communication

László Csurgai-Horváth

and

Bálint Péter Horváth

Sensors 2023, 23(7), 3375; https://doi.org/10.3390/s23073375 - 23 Mar 2023

Viewed by 578

Abstract

A significant innovation for future indoor wireless networks is the use of the mmWave frequency band. However, an important challenge comes from the restricted propagation conditions in this band, which necessitates the use of beamforming and associated beam management procedures, including, for instance, beam tracking or beam prediction. A possible solution to the beam management problem is to use artificial-intelligence-based procedures to learn the hidden spatial propagation patterns of the channel and to use this knowledge to predict the best beam directions. In this paper, we present a deep-neural-network-based method that has memory that can be used to predict the best reception directions for moving users. The best direction is the highest expected signal level at the next moment. The resulting method allows for a user-side antenna management system. The result was evaluated using three different metrics, thus detailing not only its predictive ability, but also its usability. Full article

(This article belongs to the Special Issue Advances in Microwave Communications and Radar Technologies)

► Show Figures

Figure 1

Open AccessArticle

Low-Frequency Noise Characteristics of (Al, Ga)As and Ga(As, Bi) Quantum Well Structures for NIR Laser Diodes

Bronislovas Čechavičius

and

Renata Butkutė

Sensors 2023, 23(4), 2282; https://doi.org/10.3390/s23042282 - 17 Feb 2023

Viewed by 661

Abstract

Fabry–Perot laser diodes based on (Al, Ga)As and Ga(As, Bi) with single or multiple parabolic or rectangular-shaped quantum wells (QWs) emitting at the 780–1100 nm spectral range were fabricated and investigated for optimization of the laser QW design and composition of QWs. The laser structures were grown using the molecular beam epitaxy (MBE) technique on the n-type GaAs(100) substrate. The photolithography process was performed to fabricate edge-emitting laser bars of 5 μm by 500 μm in size. The temperature-dependent power-current measurements showed that the characteristic threshold current of the fabricated LDs was in the 60–120 mA range. Light and current characteristics were almost linear up to (1.2–2.0) I_th. Low-frequency 10 Hz–20 kHz electrical and optical noise characteristics were measured in the temperature range from 70 K to 290 K and showed that the low-frequency optical and electrical noise spectra are comprised of 1/f and Lorentzian-type components. The positive cross-correlation between optical and electrical fluctuations was observed. Full article

(This article belongs to the Special Issue Advances in Microwave Communications and Radar Technologies)

► Show Figures

Figure 1

Open AccessArticle

Design of a Ku-Band Monopulse Antenna with a Truncated Reflector and an Open-Ended Waveguide Feed

Ayodeji Matthew Monebi

Chan-Soo Lee

Bierng-Chearl Ahn

and

Seong-Gon Choi

Sensors 2023, 23(1), 118; https://doi.org/10.3390/s23010118 - 23 Dec 2022

Viewed by 2146

Abstract

This paper presents a design for a monopulse reflector antenna with asymmetric beamwidths for radar applications at the Ku band. The proposed design features a rectangular waveguide monopulse feed and a truncated parabolic reflector. An array of four open-ended rectangular waveguides were employed to realize a compact monopulse feed. The reflector is cut in the H plane of the feed producing a wider beam in the azimuth plane. This type of pattern is useful in applications such as projectile tracking and airport surveillance. The design parameters for optimum performances are chosen at all stages of the design. The design and analysis have been carried out using the commercial simulation tool CST Studio Suite 2022. The directivity of the sum, elevation difference and azimuth difference channels of the reflector antenna are 32.1, 28.1, and 26.4 dB at 14 GHz; 30.9, 29, and 27.3 dB at 15 GHz; 31.7, 29.6, and 27.6 dB at 16 GHz; 31.6, 29.9, and 27.8 dB at 17 GHz. Full article

(This article belongs to the Special Issue Advances in Microwave Communications and Radar Technologies)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Special Issue "Advances in Microwave Communications and Radar Technologies"

Share This Special Issue

Special Issue Editors

Special Issue Information

Published Papers (4 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI