- Common Antenna Problems
- End Fed Random Wire
- Squid Poles
- Dipoles-Horizontal - The Trapped Dipole
- OCF Dipoles
- W3DZZ MULTI-BAND ANTENNA 80-40-20-15-10M
- Inverted Vees
- Yagi–Uda Antennas
- Beverage Antenna (Receive Only)
- Building Yagi Antennas
- My Antenna Projects
- Professional Antennas
- Passive Intermodulation (PIM)
Common Antenna Problems
End Fed Random Wire
Random-Wire-Antenna-Lengths (PDF) (local)
Introducing the squid pole - Phil Storr's home page
VK7JJ Squid Pole Writeup
Haveford HAM Amateur Radio Telescopic Squid Pole - 10 Metres
eBay item number:281902864023
Dipoles-Horizontal - The Trapped Dipole
OCF Dipole by Ron Bertrand
W3DZZ MULTI-BAND ANTENNA 80-40-20-15-10M
Antenna Traps for the W3DZZ 7.1 MHz 100 Watts
W3DZZ - a classic dipole heavily modified, now 5 bands & no tuner
VK4WST Muti Inverted-V Antenna
VK2JI 40 meter Loop
A Yagi–Uda antenna, commonly known as a Yagi antenna, is a directional antenna
consisting of multiple parallel elements in a line, usually half-wave dipoles
made of metal rods. Yagi–Uda antennas consist of a single driven element
connected to the transmitter or receiver with a transmission line, and
additional "parasitic elements" which are not connected to the transmitter
or receiver: a so-called reflector and one or more directors. It was
invented in 1926 by Shintaro Uda of Tohoku Imperial University, Japan, and
(with a lesser role played by his colleague) Hidetsugu Yagi.
Hidetsugu Yagi holding his famous Yagi-Uda design of radio antenna, which he
co-developed with Shintaro Uda in the 1920s at Tohoku Imperial University in Japan.
Building Yaga Antennas
Yagi Calculator by John Drew - DL6WU style yagis for VHF/UHF (updated 14 July 2015):
For general design I use the VK5DJ program. It is based on the research conducted by
A Note from the VK5DJ web Site:
This is buried in the Acknowledgements section and can easily be missed.
Yagi Calculator is a program to assist with the design of long yagi antennas.
It uses the graphs and principles developed by DL6WU and printed originally in
the German Radio Magazine VHF Communications (March 1982). The article was
titled Extremely Long Yagi Antennas. For best front to back ratio it is
recommended that a yagi be constructed with one of the following numbers of
elements - 10,14,19,24. Yagi builders are reminded that DL6WU designs are
primarily for long yagis. A boom length of 2 wavelengths (or 10 elements)
would be a minimum sized antenna. On the other hand, yagis with as few as
8 elements have used the design and worked very well.
Download the windows program, SetupYagiCalculator.exe from John Drew's site.
It runs under wine without any issues on my Ubuntu Version 18.04.
Folded Dipoles for VHF/UHF Yagis:
Beverage Antenna (Receive Only)
My Antenna Projects
Yagi No1 - 2m 13el Antennas Built February 2018:
As yet still not completed.
Yagi No2 - 70cm 8el Antennas Built March 2019:
70cm 8el Antennas Built March 2019
Passive Intermodulation (PIM)
PIM is a form of intermodulation distortion that occurs in components normally
thought of as linear, such as cables, connectors and antennas.
PIM shows up as a set of unwanted signals created by the mixing of two or more
strong RF signals in a nonlinear device, such as a loose or corroded connector,
or nearby rust. Other names for PIM include the diode effect and the
rusty bolt effect.
Martin Steyer DK7ZB Antenna-Homepage:
Glenn Lyons VK4PK
Ver:gnl20190128 - pre published v0.9