Topband
[Top] [All Lists]

Re: Topband: K9AY Loop Questions

To: Andrew Ikin <andrew.ikin@btconnect.com>, 'Don Kirk' <wd8dsb@gmail.com>, 'W0MU Mike Fatchett' <w0mu@w0mu.com>
Subject: Re: Topband: K9AY Loop Questions
From: Jose_Carlos <N4IS@COMCAST.NET>
Date: Fri, 7 Jan 2022 19:59:43 -0500
List-post: <mailto:topband@contesting.com>

Sent from Mail for Windows

Hi Andrew

In this case it is very important to consider that both antennas are close to 
the ground. It means the reflection from the ground is different for vertical 
vectors, that see a image below the ground in the same phase and the horizontal 
vector that see a 180 degree image that cancel the horizontal components in 
opposite phase. The vertical components adds because they are in phase.

There are very few books about loaded loop receiver antennas, most because the 
WWII use.

https://wwrof.org/webinar-archive/high-performance-rx-antennas-for-a-small-lot/

See the slides download.

You will find a reference of the first loaded loop patent. 1938 Horizontal 
polarized.

Harold Beverage patents 1938 1941 ( 80 years ago) •US 2138134 A  Phasing 
antennas •US 2247743 A  Broad Band RX Antenna •

https://patentimages.storage.googleapis.com/73/83/00/14943032331cef/US2247743.pdf

and 1940 vertical polarized

1940. Nearly all the newly re-invented compact receive antennas derive from the 
terminated loop, the earliest
reference was in an appallingly mimeographed prewar training manual of W3EEE 
Dad‘s

1973 COMMUNICATIONS 74 CONFERENCE BRIGHTON Wednesday, June 5 1974 — Session 5 
Equipment Design
Paper 5.3: Loop Antennas for HF Reception Contributed by: B.S.Collins, C & S 
Antennas Ltd.,

73’s
JC
N4IS




_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
<Prev in Thread] Current Thread [Next in Thread>