Recent Advancements in Microwave and Optoelectronics Devices

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 297

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Center of Electrical Engineering and Informatics (CEEI), Universidade Federal de Campina Grande, Av. Aprigio Veloso, 882 Bodocongo, Campina Grande 58109970, PB, Brazil
Interests: bio-inspired antennas; antenna design; optimization techniques
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Special Issue Information

Dear Colleagues,

The 21st SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2025) will be held from November 9 to 12, 2025, in Campina Grande, Brazil. Organized biennially by the Brazilian Microwave and Optoelectronics Society (SBMO) in partnership with the IEEE Microwave Theory and Techniques Society (MTT-S), IMOC is a well-established international forum that brings together researchers, engineers, and industry professionals in the fields of microwave engineering, optoelectronics, antennas, photonics, and wireless communications.

This 21st edition of IMOC will feature keynote lectures, technical sessions, special sessions, and tutorials addressing recent advances in RF devices, metamaterials, biomedical applications, 5G/6G systems, terahertz technologies, and optical communication systems. This conference promotes collaboration between academia and industry and provides an excellent platform for networking and knowledge dissemination.

A Special Issue related to IMOC 2025 will be published in Micromachines (MDPI), aiming to provide high-quality extended versions of selected papers presented during the conference.

For more information, visit the official website:
https://www.events.sbmo.org.br/imoc2025/home.

Dr. Alexandre Jean René Serres
Guest Editor

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Keywords

  • microwave devices
  • optoelectronic systems
  • antenna design and applications

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Published Papers (1 paper)

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Research

11 pages, 4153 KB  
Article
A Low-Cost Dual-Frequency Dual-Polarized Antenna Array with High Gain
by Jin-Dong Zhang, Min Wang and Wen Wu
Micromachines 2025, 16(10), 1183; https://doi.org/10.3390/mi16101183 - 19 Oct 2025
Viewed by 11
Abstract
A high-gain microstrip antenna array is proposed. The dual-frequency and dual-polarization characteristics of the array allow a satellite communication system to transmit and receive signals with a single antenna. To avoid high losses in microstrip feed lines for large apertures, the array is [...] Read more.
A high-gain microstrip antenna array is proposed. The dual-frequency and dual-polarization characteristics of the array allow a satellite communication system to transmit and receive signals with a single antenna. To avoid high losses in microstrip feed lines for large apertures, the array is divided into subarrays, each fed by a low-loss separate feed network. The dual-frequency dual-polarization function is realized by utilizing two orthogonal modes of a corner-fed rectangular patch in a single-layer substrate. Moreover, to minimize losses in the separate feed network, semi-ridged coaxial lines and five four-way radial power dividers are employed. The power divider, composed of a cylindrical cavity and five SMA connectors, features very low insertion loss. Finally, to validate the design concept, a prototype of the proposed 32 × 32-element array operating at 12.5 GHz and 14.25 GHz is fabricated and measured. The measured results are in good agreement with the simulated ones. The −10 dB return loss frequency bands for the two operating frequencies are 12.04 GHz–12.69 GHz and 13.82 GHz–14.66 GHz, respectively. The measured gains at the two operating bands are 34.5 dBi and 35.2 dBi, respectively. Full article
(This article belongs to the Special Issue Recent Advancements in Microwave and Optoelectronics Devices)
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