CB-Ring (small magnetic CB-antenna)

Diameter: ca. 45 cm - one loop

R: 220 Ohm - 5 Watt

C: trimmer 5-30 pF

Tune the capacitor for minimum S.W.R.

Im used the braid of a rigid koax-cable to form the ring. 

The antenna gain, in fact is a loss of ca. 20 dB.