- For a perfectly matched, lossless, non-reciprocal three-port circulator, the S-matrix is
0
|
0
|
S13
|
|
[S] =
|
S21
|
0
|
0
|
0
|
S32
|
0
|
- If the terminal planes are properly chosen to make the phase angles of S13, S21 and S32 zero,
S13=S21=S32=1
- Therefore,[S] matrix for 3 port circulator is
[S] = 1 0 0
0 1 0
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