Re: NEC-LIST: Fw: Lambda/4 monopoles lamdba/4 apart

Since the monopole above a perfect ground is really like a dipole in free
space, have you tried a pair of dipoles spaced 90deg apart fed 90deg apart
(in free space) to see what you get?

At 09:51 AM 9/22/2003 -0700, Phil Ede wrote:
>Hi
>
>Some time ago I tried to model some of the old CCIR condifurations for MF
>Broadcast
>arrays, and found I could not get the right radiation pattersn for Lamda/4
>monopoles
>
>I have now modelled a simple pair of Lambda/4 monopoles spaced lambda/4,
>and fed 90
> degrees apart in HFSS using perfect ground, and get a good cardiod
> pattern with a small
>rear null.
>

James Lux, P.E.
Spacecraft Telecommunications Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
tel: (818)354-2075
fax: (818)393-6875

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