Re: How to Model a Transmission Line?

Omid,

Please see my article in The ARRL Antenna Compendium Volume 3, 1992, pp.
156-164, entitled "Modelling HF Antennas with MININEC -- Guidelines and
Tips from a Code User's Notebook". This article contains a potpourri of
tid-bits; in particularly modelling transmission lines for cases where
in-phase currents on the transmission line contribut to the radiated field.

73, Jack, VE2CV

---------------------reply separator-----------------------------------------

>Hello and good morning everybody:
>
>Could someone advise me "how to write nec input file for the
>folllowing configuration?" Thanx in advance.
>The statement of problem is simple:-) A plane wave excite a unifor
>transmission line(TL) of finite size. I want to plot the amplitude and
>phase of the current at Y=0(induced in R1 due to external wave) as a
>function of azimuth angle PHI (0.:360.) for the two principle
>polarizations:
>a) parallel polarization: E_Theta[0.,Ey,Ez]
>b) perpendicular polarization E_Phi[Ex,0.,0.])
>NT. The line is situated above a Perfect Ground and a 1 V/m plane
>wave is impinging onto it at a fixed angle of incidence, 45deg.
>
>
>E^inc=(1V/m f=1.5GHz(Lambda=20.cm)), Incidence angle,fixed, Theta=45deg
> Z
> | wire Radius=.25mm
> - |==========================|
> ^ | | |Z
> | | | R1=50 ohm R2=R1 | | |
> h=3mm |_| |_| o--->Y
> | | | X/
> - ---------------------------------> <---Perfect counducting ground
> |<----------L=20cm---------| Y
> Y=0. Y=L
>
>I did some laboratory exprt. for few configurations (uniform TL and
>non-uniform TL). An example of 1st. configuration is described in Fig.
>Unfortounately, i don't possess NEC2 Manuals and am not sure how to
>model the load impedances in a distributed form. I could however
>write some of the input nec lines but not sure about LD,EX and RP.
>
>Please e-mail me at <omid_at_whistler.ee.uec.ac.jp>. btw this is my 1st
>mail to this list and am not sure if it is appropriate to this list or
>not.
>
>rgds. Omid
>--------

John S. (Jack) Belrose, VE2CV
Director, Radio Sciences
PO Box 11490 Stn. H
OTTAWA ON K2H 8S2
CANADA
TEL 613-998-2308
FAX 613-998-4077
Received on Fri Apr 12 1996 - 19:35:00 EDT