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  • Feature Paper
  • Article
  • Open Access
143 Views
18 Pages

Unique Dielectric Protection for Microwave and Millimeter-Wave Antenna Applications

  • Hafiz Usman Tahseen,
  • Luca Francioso,
  • Syed Shah Irfan Hussain and
  • Luca Catarinucci

4 October 2025

Dielectric covers are generally used to provide external protection to antenna systems by providing electromagnetic transparency. They are utilized in ground applications as well as for protecting airborne, Sat Com, terrestrial and underwater antenna...

  • Feature Paper
  • Article
  • Open Access
205 Views
17 Pages

3 October 2025

A compact fork-shaped four-element multiple-input multiple-output (MIMO) antenna system with wide bandwidth for 5G millimeter-wave (mmWave) applications is presented. The antenna elements are arranged orthogonally to achieve a compact footprint of 20...

  • Article
  • Open Access
188 Views
17 Pages

Closed-Form Approximation to the Average Symbol Error Probability for Cross-QAM over κμ Fading Channels with Experimental Validation in the Millimeter-Wave Band

  • Wilian Eurípedes Vieira,
  • Karine Barbosa Carbonaro,
  • Gilberto Arantes Carrijo,
  • Edson Agustini,
  • André Antônio dos Anjos and
  • Pedro Luiz Lima Bertarini

2 October 2025

This work presents a closed-form approximation to the symbol error probability (SEP) for cross-quadrature amplitude modulation (cross-QAM) schemes over κ–μ fading channels. The proposed formulation enables accurate performance evaluati...

  • Article
  • Open Access
222 Views
15 Pages

30 September 2025

Non-terrestrial networks (NTNs) have become increasingly crucial, particularly with the standardization of fifth-generation (5G) technology. In parallel, the rise of Internet of Things (IoT) technologies has amplified the need for human-centric solut...

  • Article
  • Open Access
396 Views
15 Pages

High-Q Terahertz Perfect Absorber Based on a Dual-Tunable InSb Cylindrical Pillar Metasurface

  • Rafael Charca-Benavente,
  • Jinmi Lezama-Calvo and
  • Mark Clemente-Arenas

22 September 2025

Perfect absorbers operating in the terahertz (THz) band are key enablers for next-generation wireless systems. However, conventional metal–dielectric designs suffer from Ohmic losses and limited reconfigurability. Here, we propose an all-dielec...

  • Article
  • Open Access
669 Views
23 Pages

DDoS Attacks Detection in SDN Through Network Traffic Feature Selection and Machine Learning Models

  • Edith Paola Estupiñán Cuesta,
  • Juan Carlos Martínez Quintero and
  • Juan David Avilés Palma

19 September 2025

This research presents a methodology for the detection of distributed denial-of-service (DDoS) attacks in software-defined networks (SDNs). An SDN was configured using the Mininet simulator, the Open Daylight controller, and a web server, which acted...

  • Feature Paper
  • Article
  • Open Access
452 Views
14 Pages

12 September 2025

This paper provides highly dispersive optical soliton solutions to the perturbed complex Ginzburg–Landau equation. The self-phase modulation structures are maintained in three forms, which are derived from the power law of nonlinearity with arb...

  • Review
  • Open Access
1,089 Views
70 Pages

9 September 2025

Waveforms define the shape, structure, and frequency characteristics of signals, whereas modulation schemes determine how information symbols are mapped onto these waveforms for transmission. Their appropriate selection plays a critical role in deter...

  • Article
  • Open Access
730 Views
15 Pages

3 September 2025

Accurate estimation of path loss is essential for evaluating the impact of the propagation medium, determining transmission power requirements, and optimizing cell layouts for effective 5G millimetre wave coverage. At 28 GHz, rain attenuation is a cr...