[TowerTalk] [Force 12 Talk] Linear Loading

John L. Hammers wa7aw@bentonrea.com
Thu, 14 Dec 2000 12:45:12 -0800


Please reply DIRECT to Bill as he is NOT subscribed to towertalk
vogler@innercite.com
Thank you
John H.
wa7aw

>Return-Path: <Force12Talk-return@qth.com>
>From: "Bill Vogler" <vogler@innercite.com>
>To: <Force12Talk@qth.com>
>Subject: [Force 12 Talk] Linear Loading 
>Date: Thu, 14 Dec 2000 12:08:36 -0800
>X-ListMember: wa7aw@bentonrea.com [Force12Talk@qth.com]
>
>Hello -
>
>I just got back into ham radio from a long layoff (1981). Around 1982 I did
>graduate work at the MSEE level and took quite a few courses in
>electromagnetic theory and antennas. In those courses I don't remember any
>references to linear loading.
>
>What is linear loading? After reading both the ARRL antenna handbook and
>ON4UN's low band dxing book it appears that linear loading is some black
>magic technique to make an antenna mechanically shorter. Are there any
>references available that discuss this both intuitively and theoretically so
>I could have a better feel on what is going on? Is linear loading the
>accepted name in academia, or is it referred to by some other name?
>
>Secondly, how do the designers at F12 and other companies model the linear
>loading circuits? Do they model it as discrete circuit components and throw
>in some 'fudge' factors, or is there some analysis codes that can handle
>this situation? Boy that would be fun modeling my c4sxl with the electric
>field integral equation (EFIE) from scratch. I think I'll get right on that.
>
>73s
>
>Bill, w6qd
>
>
>
>
>
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