Search Results - "Shortwave radio"

短波通信智能选频辅助决策系统设计研究.

Alternate Title: Research on the design of an intelligent frequency selection decision-making system for shortwave communication.

Authors: 汪梦西 徐 池

Source: Command Control & Simulation / Zhihui Kongzhi yu Fangzhen. Jun2026, Vol. 48 Issue 3, p49-56. 8p.

Polar Modulation -- The Path to High Efficiency: This modulation technique -- expanded on in a QEX companion piece -- was key to K1KP's 12-year search for an improved HF transmitter.

Authors: Brock-Fisher, Tony, k1kp@arrl.net

Source: QST (0033-4812); May2025, Vol. 110 Issue 5, p33-36, 4p

Icom IC-7760 MF/HF and 6-Meter Transceiver.

Authors: Wilson, Mark, k1ro@arrl.net

Source: QST (0033-4812); Apr2026, Vol. 110 Issue 4, p45-54, 10p

Remote Transceiver Antenna Switch: Switch any one of up to five transceivers into a single antenna.

Source: QST (0033-4812); Apr2026, Vol. 110 Issue 4, p30-33, 4p

Everything ether at once.

Authors: Morris, Jeffrey M.¹ (AUTHOR) morris@tamu.edu

Source: Sound Studies. Mar2026, Vol. 12 Issue 1, p160-163. 4p.

The 2025 IARU HF World Championship Results.

Authors: Raymond, Bob, bobraymondwa1z@gmail.com

Source: QST (0033-4812); Mar2026, Vol. 110 Issue 3, p74-77, 4p

Understanding Blocking Dynamic Range in HF Receivers: The second of a three-part series explaining receiver dynamic range measurements performed by the ARRL Lab.

Authors: Spatta, George

Source: QST (0033-4812); Jun2026, Vol. 110 Issue 6, p35-37, 3p

Understanding Reciprocal Mixing Noise and Dynamic Range in HF Receivers: The first of a three-part series explaining receiver dynamic range measurements performed by the ARRL Lab.

Authors: Spatta, George

Source: QST (0033-4812); May2025, Vol. 110 Issue 5, p30-32, 3p

Sharing EmComm Knowledge in Curaçao: An ARES Emergency Coordinator from New Jersey visited PJ2 to explore the use of Winlink over VARA as an aid for emergency services.

Source: QST (0033-4812); Jul2026, Vol. 110 Issue 7, p62-64, 3p

Understanding Third-Order Intermodulation Distortion Dynamic Range in HF Receivers: The final installment of a three-part series explaining receiver dynamic range measurements performed by the ARRL Lab.

Authors: Guzick, Maury, w5io@sbcglobal.net

Source: QST (0033-4812); Jul2026, Vol. 110 Issue 7, p41-43, 3p

Innovative passive BLE technology as an alternative to UHF RFID: Preliminary lab performance test results for main use cases.

Authors: Bottani, Eleonora Casella, Giorgia Palmisano, Gaetano et al.

Source: International Journal of RF Technologies: Research & Applications; Aug2025, Vol. 15 Issue 2, p125-144, 20p

Ask Ask WITH SAGE AND BRIAR.

Authors: BRAAF, ELLEN R. (AUTHOR)

Source: Ask (1535-4105). Nov/Dec2023, Vol. 22 Issue 9, p29-29. 1p. 1 Cartoon or Caricature.

A GaN-based multi-threshold two-finger high electron mobility transistor with reduced third-order nonlinearity by nullification.

Authors: Patil, Mahalaxmi Sheikh, Aaqib H. Khalid, Nashra et al.

Source: APL Electronic Devices. Jun2025, Vol. 1 Issue 2, p1-7. 7p.

Bilateral orthogonality generative acquisitions method for homogeneous T2* images using parallel transmission at 7 T.

Authors: Boğa, Çelik Henning, Anke

Source: Magnetic Resonance in Medicine. Mar2025, Vol. 93 Issue 3, p1043-1058. 16p.

Subjects: Shortwave radio, Radio transmitters & transmission, Contrast effect, Inductive effect, Number systems

An Exponential Spiral Antenna: This no-tune antenna for 160 to 10 meters won third place in the 80 through 10 meters category of the 2024 QST Antenna Design Competition.

Authors: Yasuhiro Kawai, kawai@bishop.avexnet.or.jp

Source: QST (0033-4812); Oct2025, Vol. 109 Issue 10, p33-35, 3p

Deterministic chaos in modulated multi-cell drifts of localized lower-hybrid oscillations excited by high-frequency waves in the ionosphere.

Authors: Leyser, Thomas B.¹ (AUTHOR) thomas.leyser@irfu.se

Source: Annales Geophysicae (ANGEO) (09927689). 2025, Vol. 43 Issue 1, p319-329. 11p.

Subject Terms: *Geomagnetism, *Shortwave radio, *Electromagnetic interactions, *Radio waves, *Frequency spectra

Comparative Study of AlGaN/InGaN/β-Ga2O3 and InAlN/InGaN/β-Ga2O3 HEMTs for Enhanced RF Linearity.

Authors: Murugapandiyan, P. Revathy, A. Ramkumar, N. et al.

Source: Journal of Electronic Materials; Mar2025, Vol. 54 Issue 3, p2340-2354, 15p

隔离驱动芯片高速编解码电路设计.

Alternate Title: Design of High Speed Encoding and Decoding Circuit for Isolation Driver Chip.

Authors: 熊张良 陈苏婷 宣志斌 et al.

Source: Electronic Science & Technology. 2025, Vol. 38 Issue 2, p84-92. 9p.

A Frequency and Polarization Reconfigurable Transparent Water Antenna.

Authors: Lei Li Jing Gao Jingchang Nan

Source: Progress in Electromagnetics Research C; 2025, Vol. 152, p177-186, 10p

GENERATION OF ELECTROMAGNETIC ION CYCLOTRON WAVE BY HOT INJECTION OF ION BEAM FOR RING DISTRIBUTION WITH A.C. ELECTRIC FIELD IN JOVIAN MAGNETOSPHERE.

Alternate Title: ГЕНЕРАЦІЯ ЕЛЕКТРОМАГНІТНОЇ ІОННОЇ ЦИКЛОТРОННОЇ ХВИЛІ ШЛЯХОМ ГАРЯЧОЇ ІНЖЕКЦІЇ ІОННОГО ПУЧКА ДЛЯ КІЛЬЦЕВОГО РОЗПОДІЛУ З ЕЛЕКТРИЧНИМ ПОЛЕМ ЗМІННОГО ТОКУ В МАГНІТОСФЕРІ ЮПІТЕРА

Authors: Yadav, Garima Sharma, B. S. Ankita

Source: East European Journal of Physics. 2025, Issue 1, p91-100. 10p.