I was going through some -old- magazines and ran across an article about a loop antenna on a mobile. It was for 10 meters but that doesn't mean it wouldn't work for 11 meters. Kind of 'odd' looking but if it works...
It used two 102" whips, one shorted to the vehicle body, a wire between the tips of both whips, and the distance between the two whips making up the rest of the full wave loop. Adjusting the length of that 'tip' wire and the distance between whips would tend to 'bow' the whips toward each other (keeping tension on that wire) and by adjusting the distance between mounting points of the whips you make up for the 'shortened' 'tip' wire. Since the vehicle body is insulated from ground by the wheels, there's no 'short' to ground. Same two connections from the radio, the 'hot' whip and vehicle ground. The input impedance won't be 50 ohms, but ought'a be manageable.
Interesting idea!
- 'Doc
(am I gonna try it? I sort of doubt it but if someone else does, I'd like to hear about it!)
It used two 102" whips, one shorted to the vehicle body, a wire between the tips of both whips, and the distance between the two whips making up the rest of the full wave loop. Adjusting the length of that 'tip' wire and the distance between whips would tend to 'bow' the whips toward each other (keeping tension on that wire) and by adjusting the distance between mounting points of the whips you make up for the 'shortened' 'tip' wire. Since the vehicle body is insulated from ground by the wheels, there's no 'short' to ground. Same two connections from the radio, the 'hot' whip and vehicle ground. The input impedance won't be 50 ohms, but ought'a be manageable.
Interesting idea!
- 'Doc
(am I gonna try it? I sort of doubt it but if someone else does, I'd like to hear about it!)
