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Electronics
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Recent Advances in Microwave Engineering: Design and Application
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Recent Advances in Microwave Engineering: Design and Application

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 March 2024) | Viewed by 5336

Special Issue Editors

Dr. Changjiang Deng

E-Mail Website
Guest Editor
School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
Interests: antenna theory and design
Dr. Yan Wang

E-Mail Website
Guest Editor
School of Information Science and Technology, Fudan University, Shanghai 200433, China
Interests: antenna theory and design; mm-wave system design; intelligent beamforming
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Today, there is a growing demand for wireless systems, such as modern radar and 5G mobile communications. It drives the rapid development of microwave and electromagnetics, including theory, design, modeling, analysis, and measurement.

This Special Issue explores the recent developments and advances in microwave engineering, including both design and application. The topics include, but are not limited to, the following technical areas:

  • Microwave passive devices;
  • Microwave active devices;
  • Microwave integrated circuits;
  • Antenna theory and design;
  • Electromagnetic fields;
  • Wireless channel modeling;
  • Microwave systems;
  • Microwave metamaterials;
  • Microwave measurement;
  • Radar/communication/biology applications.

Dr. Changjiang Deng
Dr. Yan Wang
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. Electronics 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.

Keywords

  • microwave engineering
  • microwave passive and active devices
  • microwave systems and applications

Published Papers (4 papers)

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Research

14 pages, 1074 KiB  
Article
Revisiting the Power Gains of a Loaded Two-Port: Is There a Missing Element?
by Giovanni Ghione and Marco Pirola
Electronics 2024, 13(3), 545; https://doi.org/10.3390/electronics13030545 - 29 Jan 2024
Viewed by 558
Abstract
In microwave electronics, the power gains of a linear two-port are customarily defined as the ratio of an output port and input port power, where such powers are intended either as operational or as available. Two input and two output powers are thus [...] Read more.
In microwave electronics, the power gains of a linear two-port are customarily defined as the ratio of an output port and input port power, where such powers are intended either as operational or as available. Two input and two output powers are thus introduced, with four possible combinations of output/input power ratios, but only three are practically exploited, the well-known operational power gain, available power gain, and transducer power gain. In the present paper, we provide a comprehensive review of gain definitions (including the less commonly exploited added-power gains) and finally consider the missing fourth element (defined as the ratio of the output available power and of the input operational power), derive a few mathematical properties of it, both in the general and in the unilateral case, and ultimately justify the reason why this fourth gain G4 which, following the suggestion of an anonymous reviewer, we will call apparent power gain, Gapp, has little interest in the optimization of the power transfer between the generator and the load. Nevertheless, the definition and analysis of Gapp, besides being formally useful to complete the gain family, may yield a deeper insight into the very nature of power transfer optimization in a loaded two-port. Full article
(This article belongs to the Special Issue Recent Advances in Microwave Engineering: Design and Application)
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17 pages, 8061 KiB  
Article
Millimeter-Wave Conformal Directional Leaky-Wave Antenna Based on Substrate-Integrated Waveguide
by Yuchen Ma, Xiaoya Shi, Junhong Wang, Yu Zhang, Fanqi Sun and Fan Wu
Electronics 2023, 12(14), 3111; https://doi.org/10.3390/electronics12143111 - 18 Jul 2023
Viewed by 1208
Abstract
Conformal antennas have been widely used in many fields due to their advantages of low air resistance and better visual appearance. In this paper, an arced conformal leaky-wave antenna (LWA) for a designable directional beam is proposed. The antenna is achieved based on [...] Read more.
Conformal antennas have been widely used in many fields due to their advantages of low air resistance and better visual appearance. In this paper, an arced conformal leaky-wave antenna (LWA) for a designable directional beam is proposed. The antenna is achieved based on a substrate-integrated waveguide (SIW). On the upper surface, a series of non-uniform transverse slots are etched. In order to guide the design of the antenna, as another key contribution of this work, a theoretical model for the traveling-wave structure is established. Using the model, the radiation property of the LWA is analyzed. In addition, by inputting the desired beam direction, the structural parameters of the LWA can be generated through the model. To verify the performance of the antenna and the model, an LWA prototype working at 28 GHz was fabricated and tested in a microwave anechoic chamber. The experimental results are in good agreement with the simulation results. The antenna achieved a gain of 9.96 dBi with cambered surface area of 1.89 λ02. The proposed method may be a promising candidate for conformal wireless communication applications. Full article
(This article belongs to the Special Issue Recent Advances in Microwave Engineering: Design and Application)
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14 pages, 7134 KiB  
Article
Wideband Circularly Polarized Magneto-Electric Dipole Antenna Array with Metallic Walls for Millimeter-Wave Applications
by Binlong Shi, Xiaowei Cao and Changjiang Deng
Electronics 2023, 12(10), 2154; https://doi.org/10.3390/electronics12102154 - 9 May 2023
Viewed by 1875
Abstract
This work proposes a new circularly polarized (CP) 4 × 4 magneto-electric (ME) dipole antenna array using metallic walls for 28 GHz band applications. The ME dipole element is surrounded by eight metallic walls and is excited fed by microstrip line. By introducing [...] Read more.
This work proposes a new circularly polarized (CP) 4 × 4 magneto-electric (ME) dipole antenna array using metallic walls for 28 GHz band applications. The ME dipole element is surrounded by eight metallic walls and is excited fed by microstrip line. By introducing metallic walls, the 3-dB axial ratio (AR) bandwidth of the element is increased from 23% to 36.5%. The 4 × 4 array is fed by a simple 1-to-16 microstrip power divider. In contrast to the conventional substrate integrated waveguide (SIW) power divider using two layers, the proposed microstrip divider only needs one substrate layer. The experimental 3-dB AR bandwidth of the array achieves 30.1%, ranging from 22.5 to 30.5 GHz, which falls inside the −10 dB impendence bandwidth. The measured maximum gain is 19.2 dBic. Full article
(This article belongs to the Special Issue Recent Advances in Microwave Engineering: Design and Application)
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11 pages, 5317 KiB  
Communication
Design of High-Precision Terahertz Filter Based on Directional Optimization Correction Method
by Weihua Yu, Lidi Zhang, Songzhuo Liu, Gang Gao, Hong Peng and Xin Lv
Electronics 2023, 12(8), 1878; https://doi.org/10.3390/electronics12081878 - 16 Apr 2023
Cited by 1 | Viewed by 1057
Abstract
The directional optimization correction (DOC) method is proposed to reduce the performance error between desired and fabricated terahertz (THz) devices. Three 340 GHz terahertz filters with a bandwidth of 20 GHz are designed and fabricated. The traditional global optimization correction (GOC) method and [...] Read more.
The directional optimization correction (DOC) method is proposed to reduce the performance error between desired and fabricated terahertz (THz) devices. Three 340 GHz terahertz filters with a bandwidth of 20 GHz are designed and fabricated. The traditional global optimization correction (GOC) method and the proposed DOC method are used to optimize and reduce the performance error, respectively. It is garnered that the center frequency error and bandwidth error of the fabricated terahertz filter optimized by the GOC method are reduced to 3.5 GHz (~1.03%) and 2.2 GHz (~11%), respectively. Meanwhile, the center frequency error and bandwidth error of the fabricated terahertz filter optimized by the DOC method are reduced to 0.2 GHz (~0.06%) and 0.4 GHz (~2.0%), respectively, which has fewer optimization parameters and higher accuracy than the GOC method. Furthermore, the in-band return loss (RL) of two optimized terahertz filters based on the DOC and GOC methods is less than 15 dB, and the in-band insertion loss (IL) is less than 2.3 dB. Full article
(This article belongs to the Special Issue Recent Advances in Microwave Engineering: Design and Application)
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