ELEC 412 - Lecture 18 1 ELEC 412 RF & Microwave Engineering Fall 2004 Lecture 18
Dec 19, 2015
ELEC 412 - Lecture 18 31
Balanced Single Stub MatchingBecause of the parallel connection, the total admittance of the
stubs will be double that of each leg, that is, Ybal = 2Ystub. A single unbalanced stub of length d can be converted into an equivalent balanced stub of length db by requiring that the two configurations provide the same admittance.
ELEC 412 - Lecture 18 32
Balanced Single Stub Matching
stubopenβd
aπ
λdβdβd
stubshortedβd
aπ
λdβdβd
bb
bb
2
tantan
2tantan2
2
cotcot
2cotcot2