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Articles, Papers, Experimental Work related to Bent Dipole Antennas

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The Three L-Antennas: Wide-Equal-Tall

A half-wave dipole exhibits diferent radiation patterns when bent into space saving forms.  Starting with the basic "L" form with arms of equal length, this article covers:
  • how to get perfect matching by Off-Center-Feed (OCF)
  • how to get dipole-like performance
  • how to get a ground plane with gain

Combined Center-Fed and Off-Center-Fed Ground Plane Antenna

This article presents the concept of combining the characteristics of a conventional Ground Plane Antenna (GPA) with the elements of an Off-Center-Fed (OCF) antenna.

Various configurations provide a simple way for multi-band performance and an unusual way to obtain relatively strong directional gain.. all from a very ordinary antenna.



Antennas 101: The Basics
by Ward Silver, N0AX
Author/Editor of all the ARRL license manuals and most ARRL publications.
Contributing Editor for QST "Hands-On-Radio" column and many articles.
2016 Bill Orr Technical Writing Award Recipient.

This is an extremely concise, accurate and understandable antenna presentation by the ARRL master.
The best!

(This link takes you to the ARRL web site.  Use the "Return" symbol to go back to Bent Dipoles).


"End Effect" on an End-Fed-Half-Wave Antenna

Feeding an antenna near an end gives the advantage of resonance on all harmonics for multi-band performance.  However, there is a problem in the alignment of the first two harmonics.  The reason for the problem is called "End-Effect". 

This article explains and quantifies the issue.


Modeling the Firestik Antenna

This is an American 27 MHz vertical ground plane antenna for the 11 Meter Citizens Band.  There are no known NEC antenna models so this article reverse engineers what little information found on the internet to find the probable top-loading scheme used.  Fom this three 4NEC2 models are created.  The study results for 4 foot, 3 foot and 2 foot Firestiks are presented.

All models are included.


Sloop Rigged Utility Antenna

Here is a compact, all-purpose, no radials, portable antenna for 6 through 20 meters.  All it takes is a wooden pole and two 17 foot stainless steel telescoping antennas supported by sail rigging. 

Complete instructions are given.



Dick Reid, KK4OBI at qsl.net


Dick Reid, KK4OBI at QSL.net