You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

I've seen the ability to steer the angle of radiation in this design on 11 meters, 10, 6, 2 and the FM band by simply adjusting the wavelength of the top and bottom sections. The interesting thing is you have to make relatively large changes in wavelength to see any difference locally and the advantage is virtually indistinguishable.

Get 50 miles out and the entire situation changes. Subtle changes in wavelength here can make a 2 to 3 db difference at the targeted take off angle. I can't see any other logical explanation for the pronounced characteristic seen in this design other than this shift in wavelength and delay to the top section does have the ability to effectively steer the TOA. Otherwise known as "electronic beam tilt".

[QUOTE="Shockwave, post: 670435, member: 10882"] I've seen the ability to steer the angle of radiation in this design on 11 meters, 10, 6, 2 and the FM band by simply adjusting the wavelength of the top and bottom sections. The interesting thing is you have to make relatively large changes in wavelength to see any difference locally and the advantage is virtually indistinguishable. Get 50 miles out and the entire situation changes. Subtle changes in wavelength here can make a 2 to 3 db difference at the targeted take off angle. I can't see any other logical explanation for the pronounced characteristic seen in this design other than this shift in wavelength and delay to the top section does have the ability to effectively steer the TOA. Otherwise known as "electronic beam tilt". [/QUOTE]

Top Bottom