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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 -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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