Re: NEC-LIST: Antenna in a medium with epsilon

Whoops, as was pointed out to me, the message below should have said
to scale the frequency by the square root of the relative
permittivity. So in the example below, scale by a factor of square
root of two.

Matt Taylor

-----Original Message-----
From: Matt Taylor <matayl_at_inr.net>
To: nec-list_at_ee.ubc.ca <nec-list_at_ee.ubc.ca>; Israel Garcia
<israel.garcia_at_ieee.org>
Date: Tuesday, December 01, 1998 1:18 AM
Subject: Re: NEC-LIST: Antenna in a medium with epsilon'

>Israel,
>
>I am assuming that the propagation medium and the metal are lossless.
>
>Scale the frequency so that the wavelength in the free space of the
>NEC model would be equal to the real wavelength in the real medium.
>
>Example: if the medium has a relative permittivity of 2, then scale
>the frequency up by a factor of 2.
>
>Matt Taylor
>
>-----Original Message-----
>From: Israel Garcia <israel.garcia_at_ieee.org>
>To: nec-list_at_ee.ubc.ca <nec-list_at_ee.ubc.ca>
>Date: Monday, November 30, 1998 7:17 PM
>Subject: NEC-LIST: Antenna in a medium with epsilon'
>
>>Do any of you know a trick to model under NECWin Pro 1.1 an antenna
>>radiating into a medium diferent than air (epsilon' different than
>>1). I know this condition has been included in NEC4, but it is not in
>>NEC2.
Received on Wed Dec 02 1998 - 10:33:03 EST