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Electricity, Electronics, and Communications 293
f 4900/s
0
If s is in centimeters, then:
f 15,000/s
0
Harmonic half-¨ave resonanceð occur at all integral multipleð
of this frequency.
Quarter-wave transmission-linł
resonanŁ frequency
Let s be the end-to-end lengtà (in inche0 of a section of trans-
mission line whose velocity factor (as a ratio between 0 and 1)
is v. Then the fundamental quarter-wave transmission-line res-
onant frequencð (in megahertz) is denoted f and is given by:
0
f 2950v/s
0
If s is in centimeters, then:
f 7500v/s
0
If s is in feet, then:
f 246v/s
0
Harmonic quarter-wave resonanceð occur at odd integral
multipleð of this frequency.
Half-wave transmission-linł resonanŁ
frequency
Let s be the end-to-end lengtà (in inche0 of a section of trans-
mission line whose velocity factor (as a ratio between 0 and 1)
is v. Then the fundamental half-wave transmission-line reso-
nant frequencð (in megahertz) is denoted f and is given by:
0
f 4900v/s
0
If s is in centimeters, then:
f 15,000v/s
0
If s is in feet, then:
