This commit is contained in:
Jan Petykiewicz 2024-03-14 22:38:17 -07:00
parent 2c5c40c1e7
commit 0ad78271ca

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@ -225,11 +225,19 @@ def connect_s(
) -> NDArray[numpy.complex128]:
"""
TODO
connect two n-port networks' s-matrices together.
specifically, connect port `k` on network `A` to port `l` on network
freq x ... x n x n
Based on skrf implementation
Connect two n-port networks' s-matrices together.
Specifically, connect port `k` on network `A` to port `l` on network
`B`. The resultant network has nports = (A.rank + B.rank-2); first
(A.rank - 1) ports are from `A`, remainder are from B.
Assumes same reference impedance for both `k` and `l`; may need to
connect an "impedance mismatch" thru element first!
Args:
A: S-parameter matrix of `A`, shape is fxnxn
k: port index on `A` (port indices start from 0)
@ -237,7 +245,7 @@ def connect_s(
l: port index on `B`
Returns:
C: new S-parameter matrix
new S-parameter matrix
"""
if k > A.shape[-1] - 1 or l > B.shape[-1] - 1:
raise ValueError("port indices are out of range")
@ -253,11 +261,18 @@ def innerconnect_s(
) -> NDArray[numpy.complex128]:
"""
TODO
n x n x freq
connect two ports of a single n-port network's s-matrix.
freq x ... x n x n
Based on skrf implementation
Connect two ports of a single n-port network's s-matrix.
Specifically, connect port `k` to port `l` on `S`. This results in
a (n-2)-port network.
Assumes same reference impedance for both `k` and `l`; may need to
connect an "impedance mismatch" thru element first!
Args:
S: S-parameter matrix of `S`, shape is fxnxn
k: port index on `S` (port indices start from 0)
@ -276,18 +291,18 @@ def innerconnect_s(
if k > S.shape[-1] - 1 or l > S.shape[-1] - 1:
raise ValueError("port indices are out of range")
l = [l]
k = [k]
ll = slice(l, l + 1)
kk = slice(k, k + 1)
mkl = 1 - S[k, l]
mlk = 1 - S[l, k]
mkl = 1 - S[..., kk, ll]
mlk = 1 - S[..., ll, kk]
C = S + (
S[k, :] * S[:, l] * mlk
+ S[l, :] * S[:, k] * mkl
+ S[k, :] * S[l, l] * S[:, k]
+ S[l, :] * S[k, k] * S[:, l]
S[..., kk, :] * S[..., :, l] * mlk
+ S[..., ll, :] * S[..., :, k] * mkl
+ S[..., kk, :] * S[..., l, l] * S[..., :, kk]
+ S[..., ll, :] * S[..., k, k] * S[..., :, ll]
) / (
mlk * mkl - S[k, k] * S[l, l]
mlk * mkl - S[..., kk, kk] * S[..., ll, ll]
)
# remove connected ports