Dipole Antenna Radiation Patterns by WB4YJT
Open round table discussion here.
Looking for input and opinions.
Reading the link above it looks like the best height for a radiation pattern of a dipole is 1/2 WL above ground.
Would this also hold true for a yagi?
http://www.arrl.org/files/file/QEX_Next_Issue/May-Jun_2011/QEX_5_11_Siwiak.pdf
This link states that 1.5 to 1.6wl is best height above ground for DX.
The previous link shows 1.5 wl above ground not so good a pattern.
I use a MosleyPRO67B at 55' above earth ground. Works great 10 though 17 meters and pretty decent on 20 meters. Just a cloud warmer on 40 meters per say.
I am thinking of raising it another 20' to 30' in height. Not an issue I use a hazer to raise and lower the yagi and the tower is on a tilt plate.
Will the performance on the higher bands start to suffer due to height above ground? I have always understood that higher is better, within reason.
Or leave the yagi at 55' install another tower to 90' and use dipoles?
Then again the first link says above 1/2 wl the pattern gets skewed?
Opinions or thoughts?
Open round table discussion here.
Looking for input and opinions.
Reading the link above it looks like the best height for a radiation pattern of a dipole is 1/2 WL above ground.
Would this also hold true for a yagi?
http://www.arrl.org/files/file/QEX_Next_Issue/May-Jun_2011/QEX_5_11_Siwiak.pdf
This link states that 1.5 to 1.6wl is best height above ground for DX.
The previous link shows 1.5 wl above ground not so good a pattern.
I use a MosleyPRO67B at 55' above earth ground. Works great 10 though 17 meters and pretty decent on 20 meters. Just a cloud warmer on 40 meters per say.
I am thinking of raising it another 20' to 30' in height. Not an issue I use a hazer to raise and lower the yagi and the tower is on a tilt plate.
Will the performance on the higher bands start to suffer due to height above ground? I have always understood that higher is better, within reason.
Or leave the yagi at 55' install another tower to 90' and use dipoles?
Then again the first link says above 1/2 wl the pattern gets skewed?
Opinions or thoughts?