*** Contents ***
Mode matching program calculating the 
SCATTERING PARAMETERS OF A WAVEGUIDE CROSS-SECTION JUMP.
Fairly well tested to this point (measurements, comparisions with results 
obtained with Finite Differences).

Fortran77, single precision.

cpp is used to convert automaticly to double precision before compiling.

It is assumed, that you have a compiled library of LAPACK and BLAS ready
on your machine. Both are freely available from NETLIB, e.g.:
	elib.zib-berlin.de:/pub/netlib/lapack

*** How? ***
All of this is included in the shell archive kdps.shar. If you have gnu zip
(gzip) available, do retrieve the *.gz file. If the file was damaged during 
transfer, you'll get notified during extraction. To extract the code do the 
following: 
	make a new directory; cd new dir
	gunzip kdps.shar.gz
	sh kdps.shar

After extraction the following files should be present:
	AUTHOR COPYRIGHT Makefile README arndt.f arndt.in blas.h dble.h err.f
	kdps.f kdps.shar kdps1.f kdps2.f kdps3.f lapack.h maxmod.f xerlap.f

Assemble machine-readable code and run a sample:
	read README-file
	edit Makefile (path of cpp, name of Fortran compiler,...)
	type make
	type arndt < arndt.in > out

The file out will then (hopefully) contain some selected scattering
parameters aligned in plotmtv-compatible format. When plotted you should
see the same curves as in:
	Hartmut Patzelt, Fritz Arndt, "Double-Plane Steps in Rectangular
	Waveguides and their Application for Transformers, Irises,
	and Filters", MTT-30 (Microwaves Theory and Techniques Vol.30), 1982

If you don't have plotmtv, you can get it by anonymous ftp from:
	ftp.edvz.univie.ac.at:/unix/systems/hpux/hpux9/X11R5/Graphics

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Bengt W Littmann  littmann@tetibm1.ee.TU-Berlin.DE 
                  na.blittmann@na-net.ornl.gov