Advanced Antenna and Metasurface Technologies

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ABSTRACT A compact and low‐cost Frequency Selective Surface (FSS) cavity‐backed spiral antenna is proposed for Global Navigation Satellite System (GNSS) applications. The antenna is designed to achieve stable circular polarization and high efficiency within the GNSS band (1.164–1.61 GHz, | S 11 | < −10 dB). Unlike con…

In this paper, a meandered inverted–F(MI–F) antenna is designed and presented for 5G smartphone applications. The operating frequency of designed antenna is 27 GHz with 10 dB bandwidth from 26.44 to 27.77 GHz. The electrical performance of the presented MI–F antenna is evaluated in terms of frequency–dependent return…

Miniaturized beam-steerable antenna systems are crucial for$\mathbf{5 G}$($\mathbf{5}^{\text{th}}$generation) communication networks with stringent transmission and size requirements, especially in portable, hand-held devices. In this work, we demonstrate wafer-level integration of MEMS technology with antenna arrays…

Reconfigurable intelligent surfaces (RISs) have attracted considerable attention in the wireless communications literature for their ability to enhance capacity and coverage by dynamically reconfiguring the electromagnetic propagation environment using low-cost, nearly passive reflective elements. This study introduce…

ABSTRACT Sufficient electromagnetic isolation between the feeding ports is necessary in shared‐aperture patch antennas, where ports are closely configured to feed a single patch radiator. This letter presents a multi‐feeding co‐aperture circular patch antenna layout with hardware‐level self‐decoupling features for pat…

Özet henüz yok.

Özet henüz yok.

Metasurfaces (MTSs) have become an inviting research area, widely used in a variety of high-frequency communications and other applications for manipulating electromagnetic waves. These structures, typically designed to be as thin as subwavelengths, offer advantages such as easy manufacturing with small volumes and th…

The continuous advancement of aerospace and aviation technologies has intensified the demand for compact, efficient, and reliable antenna systems that can be employed across a wide range of platforms, including conventional passenger aircraft, unmanned aerial vehicles (UAVs), satellite communication infrastructures, a…

This study presents a comprehensive classification and analysis of electromagnetic wave absorbers based on material composition, configuration form, geometric shape, and frequency characteristics. A comparative evaluation of various absorber configurations including flat-plate, quarter-wavelength (λ/4), multilayer, Ja…

Terahertz (THz) unmanned aerial vehicle (UAV)-to-UAV communication offers multi-gigabit-per-second throughput through large available bandwidths, but requires highly directional beams to overcome severe path loss and atmospheric attenuation at these frequencies. On the other hand, the rapid and irregular mobility of U…