AddCoaxialPort
==============
```{function}  AddCoaxialPort( CSX, prio, portnr, pec_name, materialname, start, stop, dir, r_i, r_o, r_os, varargin )
```
Full definition:
```{code-block} matlab
function [CSX,port] = AddCoaxialPort( CSX, prio, portnr, pec_name, materialname, start, stop, dir, r_i, r_o, r_os, varargin )
```

- CSX:          CSX-object created by InitCSX()
- prio:         priority for excitation and probe boxes
- portnr:       (integer) number of the port
- pec_name:     metal property for coaxial inner/outer conductor (created by AddMetal())
- materialname: substrate property for coaxial line (created by AddMaterial())
                Note: this may be empty for an "air filled" coaxial line
- start:        3D start rowvector for coaxial cable axis
- stop:         3D end rowvector for coaxial cable axis
- dir:          direction of wave propagation (choices: 0, 1, 2 or 'x','y','z')
- r_i:          inner coaxial radius (in drawing unit)
- r_o:          outer coaxial radius (in drawing unit)
- r_os:         outer shell coaxial radius (in drawing unit)

variable input:
-  varargin:    optional additional excitations options, see also AddExcitation
- 'ExciteAmp'   excitation amplitude of transversal electric field profile,
                set to 0 (default) for a passive port
- 'FeedShift'   shift to port from start by a given distance in drawing
                units. Default is 0. Only active if 'ExciteAmp' is set!
- 'Feed_R'      Specify a lumped port resistance. Default is no lumped
                port resistance --> port has to end in an ABC.
- 'MeasPlaneShift'  Shift the measurement plane from start t a given distance
                in drawing units. Default is the middle of start/stop.
- 'PortNamePrefix' a prefix to the port name

the mesh must be already initialized

example:



-----------------------
Thorsten Liebig <thorsten.liebig@gmx.de> (c) 2013

See also InitCSX AddMetal AddMaterial AddExcitation calcPort