Networks (NT)
Purpose:
To generate a two-port nonradiating, network connected between any
two segments in the structure. The characteristics of the network
are specified by its short-circuit admittance matrix elements. For
the special case of a transmission line, a separate card is provided
for convenience although the mathematical method is the same as for
networks. Refer to the TL card.
Card:
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/2| 5| 10| 15| 20| 30| 40| 50| 60| 70| 80|
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|NT |I1 | I2 | I3 | I4 | F1 | F2 | F3 | F4 | F5 | F6 |
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| | | | | | Y11R | Y11I | Y12R | Y12I | Y22R | Y22I |
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| The numbers along the top refer to the last column in each field |
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- Parameters:
- Integers
- (I1) - Tag number of the segment to which
port one of the network
is connected. This tag number along with the number to be
given in (I2), which identifies the position of the segment
in a set of equal tag numbers, uniquely defines the segment
for port one. Blank or zero here implies that the segment
will be identified, using the absolute segment number in the
next location (12).
- (I2) - Equal to m, specifies the m^{th} segment
of the set of segments
whose tag numbers are equal to the number set by the previous
parameter. If the previous parameter is zero, the number in
(12) is the absolute segment number corresponding to end one
of the network. A minus one in this field will nullify all
previous network and transmission line connections. The
rest of the card is left blank in this case.
- (I3) & (I4) - Used in exactly the same way as
(Il) & (I2) in order
to specify the segment corresponding to port two of the
network connection.
- Floating point
The six floating-point fields are used to specify the real and
imaginary parts of three short circuit admittance matrix elements
(1, 1), (1, 2), and (2, 2), respectively. The admittance
matrix is symmetric so it is unnecessary to specify element (2, 1).
- Y11R (F1) - Real part of element (1, 1) in mhos.
- Y11I (F2) - Imaginary part of element (1, 1) in mhos.
- Y12R (F3) - Real part of element (1, 2) in mhos.
- Y12I (F4) - Imaginary part of element (1, 2) in mhos.
- Y22R (F5) - Real part of element (2, 2) in mhos.
- Y22I (F6) - Imaginary part of element (2, 2) in mhos.
Notes: