Re: NEC-LIST: DECT Coverage in Metal Tunnel

Hi,

I suppose it is generally accepted that even if you 'pad' the ends of
your metal box-tunnel (5X10X40 m) there will still be multipath. This
is a similar situation to a paper presented recently on selective use
of anechoic materials on a shielded room.

A Method Of Reducing The Number Of Ferrite Tiles In An Absorber Lined
Chamber Clegg, J.; Alexander, M.; Dawson, L.; Dawson, J.F.; Jee, I.;
Marvin, A.C.; Loader, B.; Porter, S.J pages 59-64 in the
'International Conference and Exhibition on Electromagnetic
Compatibility', 1999. EMC York 99. (Conf. Publ. No. 464) 1999

I have a copy of the paper somewhere in storage. Contact me directly
if you are still interested.

As for a simulation, 300/1800 = 0.1667 or patch/segment size of
0.01667 m and 5 X 10 x 40 meters will translate to (300 X 600 X 2 +
300 X 2400 X 2 + 600 X 2400X2 )X 4 = 18,720,000 unknowns. (Someone
help me with this, I think I am getting a little rusty.)

I suppose it will be advisable to consider symentry to reduce the
problem size to 1/4 .

At this rate you will probably be looking for a 'Beowulf' scale
cluster of 1000's nodes.

Tim Foo <fwj_at_np.edu.sg>
ECE Dept, http://www.np.edu.sg/ece/
Ngee Ann Polytechnic,
535 Clementi Road,
Singapore 599489

Tel: + 65 460 6143
Fax: + 65 467 1730
Received on Mon Apr 10 2000 - 00:12:23 EDT