high frequency

(redirected from HF radio)
Also found in: Dictionary, Thesaurus.
Related to HF radio: Ham radio

high frequency

a radio-frequency band or radio frequency lying between 3 and 30 megahertz

high frequency

[′hī ¦frē·kwən·sē]
(communications)
Federal Communications Commission designation for the band from 3 to 30 megahertz in the radio spectrum. Abbreviated HF.

high frequency

The frequency band between 3 and 30 MHz. This normally is used for long-range air-to-ground communications.
References in periodicals archive ?
The L3Harris Falcon Wideband Airborne HF Radio features embedded encryption, electronic counter-counter measures (ECCM), low probability of intercept and low probability of detection (LPI/LPD) and is upgradable to accept new waveforms and software delivered capabilities.
Understanding signal propagation and techniques of antenna employment have faded, as has the functional use of existing HF radios. Simultaneously, the cadre of experienced HF instructors has retired and hasn't been replaced, resulting in a lack of genuinely experienced personnel with a strong background in the use of high frequency equipment throughout the armed services.
(25) (Miller, also credited with contributing to Mirick's receiver, would spend much of his career developing the piezoelectric crystal hardware and theory necessary to standardize and measure HF radio.) (26)
Le Guen, "HF 125 W half-loop antennas in ALE and ECCM for land mobile, navy and helicopter use," HF Radio Systems and Techniques, No.
With only weak HF radio contact, they elected to turn back towards the mainland and run the checklists further.
Until two years ago the kids in remote communities and on cattle stations had to learn over a crackly HF radio. Now satellite broadband has come to the Outback and allows Window to teach kids online.
"These advanced HF radio systems will be used for the Army's Modularity Program and to address the critical needs of the Army National Guard and Reserve," said Dana Mehnert, vice president and general manager of business development and operations, Harris RF Communications Division.
We pay a whopping $2,405 every time the ARC-220 HF radio control head, NSN 5821-01-413-4243, gets damaged.
The Belgian-Norwegian communication systems developer Zenitel said today (14 February) that its subsidiary Zenitel Netherlands BV had secured three new contracts for HF radio communication systems.
Before switching to satellite last year, MEDjet had relied on HF radio communications, but the signal was subject to interference from storms and wasn't as secure as it needed to be.
To counter the problems inherent in all the above mentioned communications options, the British electronics group Racal has been selling an HF radio system, for secure long-range voice and data telecommunications since the early 1990s.
Contract notice: hf radio systems for c130j-30 super hercules aircraft