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Old 1-Aug-2016, 11:22 AM   #36
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
Originally Posted by bobsgarage View Post
Rabbit, how much influence can the mast have on reception?
Very little; not enough to worry about. The antenna has horizontal polarization to match the transmitted signal, but the mast is vertical. Also, the mast is located near the center of the elements where the signal voltage is at a minimum which reduces the influence of the mast.

The ends of the elements, where the signal voltage (E) is highest, are more sensitive to touch and nearby objects. The current (I) is highest at the center.

https://en.wikipedia.org/wiki/Dipole_antenna
Attached Images
File Type: gif DipoleEandI.gif (13.4 KB, 575 views)
File Type: gif dipole-half-wave-current-voltage-waveforms.gif (1.8 KB, 541 views)
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Last edited by rabbit73; 1-Aug-2016 at 3:04 PM.
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