Results 41 to 50 of about 1,271 (183)

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source

Desain dan Implementasi Rectenna Hexagonal Patch Array Pada Frekuensi 2,4 GHz

Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems), 2018
Abstrak– Penelitian rectenna yang dilakukan terdiri atas dua bagian yaitu antena yang berbentuk hexagonal array dan rectifier. Rectenna hexagonal array ini didesain agar bisa menangkap gelombang radio (RF) pada frekuensi 2,4 GHz yang dapat ...
Herma Nugroho rono adi Kusumo, Sholeh Hadi Pramono, Erni Yudaningtyas   +2 more
doaj   +1 more source

Printable Liquid Metal‐Textiles for Deformation‐Insensitive and Electromagnetically Robust mmWave Devices

Advanced Science, Volume 13, Issue 28, 18 May 2026.
We present a textile‐compatible, self‐healing liquid metal ink and a dual‐mask printing technique for high‐resolution patterning. Using this approach, we demonstrate high‐performance millimeter‐wave (mmWave) electronic textiles that exhibit exceptional insensitivity to deformation.
Lu Ju, Buyun Yu, Rui Wang, Hao Chen, Kexin Hou, Chao Zhang, Mingyang Geng, Yunqian Dai, Yingying Zhang, Ying‐Shi Guan, Cunjiang Yu, Wei‐Bing Lu   +11 more
wiley   +1 more source

Transmission coefficient estimation based on antenna voltage standing wave ratio under plasma sheath

AIP Advances, 2018
Radio blackout has confused the aerospace industry for decades. The highly attenuated caused by the plasma sheath is the main cause of radio blackout. The transmission coefficient depends on the relationship between plasma density, collision frequency ...
Min Yang, Xiaoping Li, Bowen Bai, Ze Li, Bosheng Xue   +4 more
doaj   +1 more source

A Miniaturized Wing‐Conformal Phased Array for Simultaneous Wideband and Wide‐Angle Scanning

Electronics Letters, Volume 62, Issue 1, January/December 2026.
This paper presents a compact S‐band wing‐conformal phased array antenna with wide bandwidth, wide‐angle azimuth scanning and a narrow elevation beam width. The design uses a tightly spaced 1 × 12 array with an element spacing of only 0.31λ at the lowest frequency, combined with WAMSs and a hybrid director‐FSS structure to realize wideband operation ...
Yang Zhou, Yongzhong Zhu, Xiaoyu Liu, Ying Liu, Wenxuan Xie, Yueping Peng   +5 more
wiley   +1 more source

Wideband and Frequency‐Reconfigurable Loop Antenna for Sub‐6 GHz Applications

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This work tackles the longstanding bandwidth limitation of loop antennas by introducing a compact, symmetrical design that integrates a microstrip balun and periodic varactor loading. Unlike existing methods that often compromise symmetry or beam control, the proposed structure achieves both wide impedance bandwidth and frequency reconfigurability ...
Amir Jafargholi, Romain Fleury
wiley   +1 more source

Design Concept of High‐Power RF/Microwave Termination With a Cascade of Π‐Type Attenuation Networks

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
A high‐power RF/microwave resistor termination, with a cascade of π‐type resistor attenuation networks, multi‐segment microstrip structure and electromagnetic constraint metal carrier, is designed to improve the voltage standing wave ratio (VSWR), especially in the high frequency band and increase the power capacity by reducing the risk of local ...
Yu Liu, Yuze Liang, Hao Peng, Na Xue, Guoli Zhou, Jiming Chen, Tao Yang   +6 more
wiley   +1 more source

COMPACT AND EFFICIENT UWB ANTENNA FOR SMART VEHICLE COMMUNICATION SYSTEMS

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ
The most recent wireless technology is ultra-wideband (UWB), which makes use of a broad frequency range for efficient communication, fast data transmission, and precise position recognition.
Amjad Kadhum Majeed, Rashid Ali Fayadh, Mousa K. Wali, H. S. Mohammed   +3 more
doaj   +1 more source

A Low Profile Dual‐Polarised Dual‐Band Base‐Station Antenna With Bandwidth Extension

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
A dual‐polarised, dual‐band, miniaturised and broadband base‐station antenna is proposed. For the LB dipole arm, a vertically bent horizontal dipole structure is adopted to extend the operating frequency downward to 617 MHz while preserving the LB upper‐band performance.
Zhou‐fu Lin, Fan Zhang, Fu‐Shun Zhang   +2 more
wiley   +1 more source

A method for analyzing the VSWR effects of paint on K-band onboard antenna arrays

AIP Advances
Today’s aerial vehicles are fitted with antennas for various wireless services, which are commonly designed as conformal surfaces. To improve the appearance of the finished aircraft, the antenna surfaces are painted.
Xianjin Yi
doaj   +1 more source