Critical Frequency in Antenna and Wave Propogation Formulas

Critical frequency is the highest magnitude of frequency above which the waves penetrate the ionosphere and below which the waves are reflected back from the ionosphere. And is denoted by f_c. Critical Frequency is usually measured using the Hertz for Frequency. Note that the value of Critical Frequency is always positive.

Antenna and Wave Propogation formulas that make use of Critical Frequency

fxMaximum Usable Frequency in F-regionGo

fxSkip DistanceGo

fxPropagation DistanceGo

fxMaximum Usable FrequencyGo

fxHeight of LayerGo

FAQ

What is the Critical Frequency?

Critical frequency is the highest magnitude of frequency above which the waves penetrate the ionosphere and below which the waves are reflected back from the ionosphere. Critical Frequency is usually measured using the Hertz for Frequency. Note that the value of Critical Frequency is always positive.

Can the Critical Frequency be negative?

No, the Critical Frequency, measured in Frequency cannot be negative.

What unit is used to measure Critical Frequency?

Critical Frequency is usually measured using the Hertz[Hz] for Frequency. Petahertz[Hz], Terahertz[Hz], Gigahertz[Hz] are the few other units in which Critical Frequency can be measured.

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