• In radio transmission, maximum usable frequency (MUF) is the highest radio frequency that can be used for transmission between two points on Earth by reflection...
    4 KB (529 words) - 18:22, 1 May 2024
  • Thumbnail for High frequency
    the frequencies at which communication is possible are specified by these parameters: Maximum usable frequency (MUF) Lowest usable high frequency (LUF)...
    18 KB (2,073 words) - 20:25, 7 May 2025
  • is normally just below the value of the maximum usable frequency (MUF). In the prediction of usable frequencies, the FOT is commonly taken as 15% below...
    968 bytes (131 words) - 22:32, 28 March 2023
  • Any frequency lower than this is not able to fulfill those requirements, while higher frequencies usually yield better result until the maximum usable frequency...
    895 bytes (110 words) - 22:30, 28 March 2023
  • } where MUF is maximum usable frequency and θ {\displaystyle \theta } is the angle of incidence The dependence of critical frequency with respect with...
    7 KB (1,007 words) - 18:53, 4 September 2024
  • Thumbnail for Cutoff frequency
    ionosphere. In this context, the term cutoff frequency refers to the maximum usable frequency, the frequency above which a radio wave fails to reflect off...
    12 KB (1,847 words) - 05:00, 17 February 2025
  • "Radio-Frequency Communication". Retrieved 2012-07-15. Principles of Radio Wave Propagation Radio Waves and Communications Distance Maximum usable frequency...
    2 KB (216 words) - 16:17, 12 June 2023
  • propagation. The degradation mainly consists of a reduction of the maximum usable frequency (MUF) by as much as 50%. Sometimes the E-layer may be affected...
    12 KB (975 words) - 03:32, 26 April 2025
  • of choice is at 70 MHz. As any given blend has a trade-off of maximum usable frequency, versus a higher mu value, within each of these sub-groups, manufacturers...
    8 KB (884 words) - 10:32, 24 December 2024
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    Frequency of optimum transmission Link budget Lowest usable high frequency Maximum usable frequency Multipath propagation OFDM Rain fade Rayleigh fading...
    16 KB (2,023 words) - 17:41, 13 September 2024
  • channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each...
    96 KB (5,136 words) - 04:05, 18 May 2025
  • Near vertical incidence skywave (category Radio frequency antenna types)
    causing attenuation of low frequencies during the day while the maximum usable frequency (MUF) which is the critical frequency of the F layer rises with...
    13 KB (1,533 words) - 02:21, 16 August 2024
  • Thumbnail for Full width at half maximum
    bandwidth as "width of frequency range where less than half the signal's power is attenuated", i.e., the power is at least half the maximum. In signal processing...
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  • Frequency deviation ( f Δ {\displaystyle f_{\Delta }} ) is used in FM radio to describe the difference between the minimum or maximum extent of a frequency...
    2 KB (221 words) - 10:08, 30 July 2024
  • Thumbnail for Skywave
    Skywave (category Radio frequency propagation)
    again towards the ionosphere. When operating at frequencies just below the maximum usable frequency, losses can be quite small, so the radio signal may...
    18 KB (2,296 words) - 23:44, 27 February 2025
  • F region (category Radio frequency propagation)
    this depends upon the frequency of a propagating signal. The E layer electron density and resultant MUF, maximum usable frequency, during high solar activity...
    5 KB (706 words) - 16:54, 4 March 2025
  • Thumbnail for Frequency-shift keying
    exactly half a carrier period. The maximum frequency deviation is δ = 0.25 fm, where fm is the maximum modulating frequency. As a result, the modulation index...
    16 KB (1,913 words) - 03:39, 31 July 2024
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    Solar cycle (category Use dmy dates from May 2024)
    variances. Changes in solar output affect the maximum usable frequency, a limit on the highest frequency usable for communications. Both long-term and short-term...
    90 KB (10,111 words) - 12:43, 11 May 2025
  • code – Maser – Mask work – Master frequency generator – Maximal-ratio combiner – Maximum power – Maximum usable frequency – Maxwell coil – Maxwell's demon...
    34 KB (2,802 words) - 02:36, 17 December 2024
  • by the International Radiotelegraph Convention in 1927. As the maximum usable frequency for long-distance communication seldom dips below 3.5 MHz anywhere...
    19 KB (2,199 words) - 17:00, 15 April 2025
  • Thumbnail for Ionosphere
    Ionosphere (category Radio frequency propagation)
    m3 and fcritical is in Hz. The Maximum Usable Frequency (MUF) is defined as the upper frequency limit that can be used for transmission between two points...
    54 KB (6,727 words) - 22:47, 4 May 2025
  • Thumbnail for Bandwidth (signal processing)
    center frequency, and in the low-pass filter is at or near its cutoff frequency. If the maximum gain is 0 dB, the 3 dB bandwidth is the frequency range...
    16 KB (2,296 words) - 06:40, 8 May 2025
  • transmit on two spot-frequencies (35.81 MHz and 41.75 MHz) for testing propagation paths, to assay trends of the maximum usable frequency (MUF) between 30...
    8 KB (753 words) - 20:58, 20 January 2025
  • Thumbnail for Frequency-hopping spread spectrum
    minimum number of frequency channels and a maximum dwell time for each channel. In 1899, Guglielmo Marconi experimented with frequency-selective reception...
    15 KB (1,921 words) - 01:41, 3 August 2024
  • Thumbnail for Resonance
    Resonance (redirect from Resonant frequency)
    vibration that matches its resonant frequency (or resonance frequency), defined as the frequency that generates the maximum amplitude response in the system...
    60 KB (7,933 words) - 00:59, 30 April 2025
  • In statistics, maximum likelihood estimation (MLE) is a method of estimating the parameters of an assumed probability distribution, given some observed...
    68 KB (9,706 words) - 01:14, 15 May 2025
  • Frame rate (redirect from Frame frequency)
    refresh rate is the frequency at which a display shows completed frames. In electronic camera specifications frame rate refers to the maximum possible rate...
    22 KB (2,644 words) - 07:10, 9 May 2025
  • Thumbnail for Sporadic E propagation
    Sporadic E propagation (category Radio frequency propagation)
    occur using a single Es cloud. This variability in distance depends on a number of factors, including cloud height and density. The maximum usable frequency...
    18 KB (2,171 words) - 01:40, 5 April 2025
  • Non-line-of-sight propagation (category Radio frequency propagation)
    loss, as does the E-layer whose maximum usable frequency can rise to 4 MHz and above and thus block higher frequency signals from reaching the F2-layer...
    44 KB (6,551 words) - 02:47, 21 February 2025
  • Base. Bullen, J. M. (1961). An analysis of estimated values of maximum usable frequency throughout a sunspot cycle and associated electron density trends...
    4 KB (334 words) - 15:25, 8 November 2024