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Electronics
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Antennas and Microwave/Millimeter-Wave Applications
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Antennas and Microwave/Millimeter-Wave Applications

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

Deadline for manuscript submissions: 15 December 2024 | Viewed by 9041

Special Issue Editors

Prof. Dr. Youlin Geng

E-Mail Website
Guest Editor
College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
Interests: EM theory; radio wave propagation; EM scattering of analytical solution
Prof. Dr. Lixia Yang

E-Mail Website
Guest Editor
School of Electronics and Information, Anhui University, Hefei 230031, China
Interests: EM theory; radio wave propagation; EM scattering and inverse scattering

Special Issue Information

Dear Colleagues

As a key component of modern wireless communication systems, antennas and millimeter-wave (mmWave) are regarded as critical technology for future mobile communication systems. As the massive number of antenna elements for beamforming and wave propagation behavior in mmWave produce unprecedented challenges, array antennas and the array field/wave propagation aspects of mmWave must be thoroughly studied. In order to support the new frequency bands and wireless system architectures that bridge between traditional antenna topics and the challenges confronted with mmWave, authors in the related fields are welcome to contribute to this Special Issue.

This Special Issue focuses on antennas, propagation and EM theory, as well as some numerical methods—for example, the Method of Moment (MOM), Finite Difference Time Domain (FDTD) and Finite Element method (FEM), in addition to observing their applications. Ionospheric radiowave papers can also be included in this Special Issue.

Topics:

(1) Antennas;

(2) EM theory and its application;

(3) Electromagnetic scattering and inverse scattering;

(4) FDTD/MOM/FEM method and its advance application;

(5) Plasmas Electromagnetics and its application;

(6) Radiowave Propagation;

(7) Millimeter-wave.

Prof. Dr. Youlin Geng
Prof. Dr. Lixia Yang
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

  • antennas
  • electromagnetic scattering
  • numerical methods
  • radiowave propagation

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Published Papers (6 papers)

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Research

17 pages, 5462 KiB  
Article
Ka-Band Wide-Angle Scanning Phased Array with Dual Circular Polarization
by Lei Zhang and Jianyong Yin
Electronics 2024, 13(12), 2238; https://doi.org/10.3390/electronics13122238 - 7 Jun 2024
Viewed by 806
Abstract
A wide-angle scanning phased array with dual circular polarization in the Ka-band is presented in this paper. To improve the scanning capability of the phased array, the microstrip element is modified by loading many metal posts at its center and periphery. In addition, [...] Read more.
A wide-angle scanning phased array with dual circular polarization in the Ka-band is presented in this paper. To improve the scanning capability of the phased array, the microstrip element is modified by loading many metal posts at its center and periphery. In addition, a stripline coupler is designed to achieve dual circularly polarized (CP) radiation, and the inner conductor of the subminiature micro-push-on (SSMP) connectors for feeding the coupler is extended to the top layer of the multilayer element by introducing an open stub, which simplifies the assembly process between the SSMP connector and multilayer printed circuit board (PCB) due to through-hole soldering instead of blind-hole soldering. The proposed element can cover a frequency range from 28 GHz to 30.5 GHz with a relative bandwidth of 8.5% in the Ka-band. An 8 × 8 phased array is constructed based on this proposed element, and a wide-angle scanning range from −65° to +65° is obtained for the dual circular polarization. The proposed array has a gain fluctuation of 5.1 dB and an axial ratio (AR) of less than 3.3 dB during beam-steering. The prototype is fabricated and measured, with a good agreement between the measured and simulated results. The proposed phased array can be applied in a Ka-band millimeter-wave (MMW) communication system. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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12 pages, 2334 KiB  
Article
A Compact Bandpass Filter with Widely Tunable Frequency and Simple Bias Control
by Qingxin Xiang, Xiangguan Tan, Qingan Ding and Yuping Zhang
Electronics 2024, 13(2), 411; https://doi.org/10.3390/electronics13020411 - 18 Jan 2024
Cited by 1 | Viewed by 1693
Abstract
This research paper introduces an innovative design for a compact bandpass filter, notable for achieving a substantial tuning range of operational frequencies using just a single bias voltage. The design is based on a planar microstrip approach, distinguished by its straightforward and efficient [...] Read more.
This research paper introduces an innovative design for a compact bandpass filter, notable for achieving a substantial tuning range of operational frequencies using just a single bias voltage. The design is based on a planar microstrip approach, distinguished by its straightforward and efficient structure. Additionally, this filter is characterized by its excellent performance in suppressing out-of-band frequencies. To validate the practicality and effectiveness of this novel design, a compact filter was designed, manufactured, and measured. The testing results were impressive, showing that the filter’s measured center frequency could be tuned across a wide spectrum, from 1.1 to 3.1 GHz, achieving a relative bandwidth of up to 95%. Herein, the relative bandwidth is derived from the calculation of 2(fhigh − flow)/(fhigh + flow). Remarkably, the filter consistently maintains a return loss exceeding 19 dB throughout its tuning range. Additionally, it sustains a 15 dB return loss bandwidth greater than 90 MHz, with the insertion loss varying between a minimum of 0.9 dB and a maximum of 2.1 dB. The compactness of the filter is one of its standout features, with circuit dimensions measuring a mere 0.06λg × 0.09λg (physical dimensions is 13.8 mm × 21.3 mm), where λg represents the wavelength at the filter’s lowest center frequency. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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18 pages, 21830 KiB  
Article
Circularly Polarized Multiple-Input Multiple-Output Dielectric Resonator Antenna for 5G Millimeter-Wave Application
by Ming Xu and Jingwei Zhang
Electronics 2023, 12(20), 4258; https://doi.org/10.3390/electronics12204258 - 15 Oct 2023
Cited by 3 | Viewed by 1275
Abstract
A circularly polarized (CP) multiple-input multiple-output (MIMO) dielectric resonator antenna (DRA) is presented in this paper for 5G millimeter-wave (mm-wave) applications. This MIMO antenna consists of two high-order mode CP DRAs, which use the modified cross slots to generate the CP fields. Two [...] Read more.
A circularly polarized (CP) multiple-input multiple-output (MIMO) dielectric resonator antenna (DRA) is presented in this paper for 5G millimeter-wave (mm-wave) applications. This MIMO antenna consists of two high-order mode CP DRAs, which use the modified cross slots to generate the CP fields. Two complementary split ring resonators (CSRR) are used to isolate the surface current on the metal ground, which can increase the antenna isolation and optimize the axial ratio when each port is excited. The proposed MIMO antenna obtains a simulated impedance bandwidth from 25.41 to 31.18 GHz and an axial ratio (AR) bandwidth (AR < 3 dB) from 25.49 to 29.52 GHz for the 5th generation wireless communication applications. The measured results show that the antenna covers the overlapped bandwidth of 11% and isolation less than −25 dB over the frequency band range. The measured average (peak) gain is 5.84 (6.24) dBic at 26.5 GHz to 29.5 GHz for port 1 and 6.90 (7.27) dBic for port 2. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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13 pages, 5402 KiB  
Communication
A Semi-Elliptical UWB Folded Dipole Antenna
by Romain Greard, Mohamed Himdi, Dominique Lemur, Gwenal Le Dem, Pierre Thaly and Cyrille Le Meins
Electronics 2023, 12(13), 2788; https://doi.org/10.3390/electronics12132788 - 24 Jun 2023
Viewed by 1664
Abstract
In this paper, a novel structure of a semi-elliptical folded dipole for ultra-wideband (UWB) receiving applications is discussed. This proposed antenna has a directive radiation pattern resulting in a high gain over the bandwidth. The design uses a planar technology including a microstrip [...] Read more.
In this paper, a novel structure of a semi-elliptical folded dipole for ultra-wideband (UWB) receiving applications is discussed. This proposed antenna has a directive radiation pattern resulting in a high gain over the bandwidth. The design uses a planar technology including a microstrip line to slot line transition and optimized curves to obtain a measured impedance bandwidth of 2.3–26 GHz with the condition of S11 < −6 dB (level accepted for receiving antenna) and meets S11 < −10 dB in several bands. Additionally, the simulated gain ranges from 5 dBi to 9.5 dBi across the entire bandwidth with an efficiency of at least 75%. This antenna model offers a reconfiguration capability. The symmetrical feeding used in this antenna creates the directive behavior. Characteristics of this semi-elliptical folded dipole antenna make it suitable for modern wireless communications, such as 5 G around 3.5 GHz, and easy to integrate in antenna arrays (MIMO systems). The four ports of the antenna also make it a candidate for radiation pattern reconfigurability applications reducing in this way the number of elements in network antennas. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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13 pages, 6429 KiB  
Communication
A Linearly and Circularly Polarization-Reconfigurable Leaky Wave Antenna Based on SSPPs-HSIW
by Dujuan Wei and Pengquan Zhang
Electronics 2023, 12(12), 2602; https://doi.org/10.3390/electronics12122602 - 9 Jun 2023
Cited by 2 | Viewed by 1462
Abstract
In this manuscript, a reconfigurable leaky wave antenna is proposed with linearly polarized and circularly polarized properties, which is composed of two layers with feeding waveguide and radiation elements. The bottom layer is a half-mode substrate integrated waveguide etched with a spoof surface [...] Read more.
In this manuscript, a reconfigurable leaky wave antenna is proposed with linearly polarized and circularly polarized properties, which is composed of two layers with feeding waveguide and radiation elements. The bottom layer is a half-mode substrate integrated waveguide etched with a spoof surface plasmon polaritons structure as a high-dispersion feeding waveguide to excite 8 circular patches as radiation elements in the top layer. In a unit element, the horizontal linear polarization (HLP) and right-hand circular polarization (RHCP) radiation are switched using a p-i-n diode crossing a slot of a circular metal patch. HLP performance is achieved as the p-i-n diode is switched off, and RHCP is achieved as the p-i-n diode is switched on. The measured results verify the design theory and the simulated results. Over the working band of 10.4~12.8 GHz, the proposed antenna can radiate scanning beams covering about a 73° region, including the broadside direction with HLP and RHCP. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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16 pages, 11174 KiB  
Article
Design of Plasmon Absorbing Structure Suitable for Super High Frequency
by Jin Bai and Qingzhen Yang
Electronics 2023, 12(9), 2121; https://doi.org/10.3390/electronics12092121 - 6 May 2023
Viewed by 1442
Abstract
This paper proposed a plasmonic absorbing structure suitable for super high frequency. The plasmon absorbing structure is a periodic square cavity structure; the bottom of the cavity is a metal plate, the wall of the cavity is a polyester plate, and metal frames [...] Read more.
This paper proposed a plasmonic absorbing structure suitable for super high frequency. The plasmon absorbing structure is a periodic square cavity structure; the bottom of the cavity is a metal plate, the wall of the cavity is a polyester plate, and metal frames loaded with lumped resistors are printed on both sides of the polyester plate. The transmission characteristics of the absorbing structure are studied using the finite difference time domain method. The results show that the plasmon resonance characteristics can be effectively improved by loading the lumped resistance reasonably. The absorption rate of the absorbing structure is over 80% in the 4.3–21.5 GHz frequency band, and in the 4.3–7.7 GHz and 14.2–21.5 GHz frequency bands, the absorption rate is around 90%. Under different polarization modes, it is less sensitive to the incident angle. The transmission response of the absorbing structure is measured in a microwave anechoic chamber, and the measurement results agree well with the simulation results. After replacing the metal bottom plate of the absorber with a metal cavity, the radar cross-section of the cavity is reduced by 99.45% at 10 GHz. It proves that the designed and fabricated absorbing structure has the broadband absorbing ability, high angular stability, and broad application prospects. Full article
(This article belongs to the Special Issue Antennas and Microwave/Millimeter-Wave Applications)
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