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Coupled Inductance (cont.) |
Resonance (cont.) |
|
where
L M = the mutual inductance, L1 and L2 = the self inductance of the individual coils. |
where
F in cycles per second, L = inductance in henrys, C = capacitance in farads, = 6.28, = 39.5, |
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Mutual Inductance | Reactance | |
The mutual inductance of two r-f coils with fields
interacting, is given by where M = mutual inductance, expressed in same units as LA and LO, LA = Total inductance of coils L1 and L2 with fields aiding, LO = Total inductance of coils L1 and L2 with fields opposing, |
of an inductance is expressed by of an capacitance is expressed by where XL = inductive reactance in ohms, (known as positive reactance), XC = capacitive reactance in ohms, (known as negative reactance), F = frequency in cycles per second, L = inductance in henrys, C = capacitance in farads, = 6.28, |
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Coupling Coefficient | Frequency from Wavelength | |
When two r-f coils
are inductively coupled so as to
give transformer action, the coupling coefficient is expressed by, where K = the coupling coefficient; (K x 102 = coupling coefficient in %), M = the mutual inductance value, L1 and L2 = the self-inductance of the two coils respectively, both being expressed in the same units. |
where = wavelength in meters. where = wavelength in centimeters. |
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Resonance | Wavelength from Frequency | |
The resonant frequency, or frequency at which
inductive reactance XL equals capacitive reactance XC is expressed by also and |
where F = frequency in kilocycles. where F = frequency in megacycles. |
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