Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old February 10th 20, 01:41 PM posted to rec.radio.amateur.moderated,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jan 2020
Posts: 13
Default [VU2NSB] Urban Antenna Height above ground - Facts & Myths


VU2NSB.com - Amazing Amateur Radio

///////////////////////////////////////////
Urban Antenna Height above ground - Facts & Myths

Posted: 09 Feb 2020 11:57 AM PST
https://vu2nsb.com/urban-antenna-hei...antenna-height

Urban antenna height above ground The truth The antenna height above
ground, especially in urban areas on the HF bands, poses a set of
unforeseen issues that an average radio amateur is often blissfully
ignorant about. An experienced operator knows all this too well but a large
section of our community is often unaware of several kinds of radiation
lobe pattern distortions and reduction in overall antenna efficiency that
occur due to the presence of various natural geographical artifacts and
man-made entities like buildings, sheds, bridges, overhead cables,
water-pipes, etc that cause havoc. Despite a seemingly good antenna height,
the most common problems that usually plague a typical urban antenna
installation are considerable distortion in the radiation pattern. The
textbook lobe patterns and gain figures of antennas may not hold true
anymore. The second casualty is the overall efficiency of the antenna as a
radiator. The nearby building structures and objects within the near-field
zone of the antenna often absorb a certain amount of transmitter energy and
may also alter the resonance and spoil the attainable SWR. I have... Click
Here to Read Full Article []


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[QRZ] J-Pole effective height above ground QRZ.com via rec.radio.amateur.moderated Admin Moderated 0 February 11th 19 11:48 AM
Yagi height above ground amdx Antenna 6 September 11th 07 12:30 PM
6M stacked loops - best height above ground? Charlie Antenna 25 December 30th 05 03:12 AM
Reality, "Slippery Facts, and Myths John Smith Policy 13 August 9th 05 06:16 PM
roof or ground 'height'? ml Antenna 5 June 21st 05 02:19 AM


All times are GMT +1. The time now is 04:45 PM.

Powered by vBulletin® Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright 2004-2020 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017