NEC-LIST: V- and Inverted V-Dipoles

Chuck,

I had the idea this morning to lower my V- and Inverted-V dipoles to
(perhaps) a limit (say lower heights 0.1 metres).

The V-dipole behaves like a dipole: gain 2.36 dBi, resonant frequency
3.82 MHz, impedance 24.4 ohms, Front/Side (at 45 degrees elevation)
6.65 dB.

The inverted-V sure does not like its ends so close to the ground:
gain 1.87 dBi, resonant frequency 3.62 MHz (a marked change),
impedance 48.4 ohms, azimuthal pattern omnidirectional (almost equal
Horizontal and Vertical fields).

Conclusion: If you want your dipole to behave like a dipole, and have
a bit more gain, take care with the ends of your dipole --- keep them
up.

73, Jack, VE2CV
_____________________________________________
John S. (Jack) Belrose, PhD Cantab, VE2CV
Senior Radioscientist
Radio Sciences Branch
Communications Research Centre
PO Box 11490 Stn. H
OTTAWA ON K2H 8S2
CANADA
TEL 613-998-2779
FAX 613-998-4077
e-mail <john.belrose_at_crc.ca>
_____________________________________________
Received on Sat Feb 19 2000 - 11:58:43 EST