If the load impedance in Problem is changed to 100 +j50 (Ω), one discovers that a perfect match using the double-stub method with d0 = 3.λ/8 and one stub connected d.irectly across the load is not possible. However, the modified arrangement shown in Fig. 9-43 can be used to match this load with the line.
a) Find the minimum required additional line length dL.
b) Find the required lengths of the short-circuited stub tuners, using the minimum dL found in part (a).
Problem:
The double-stub method is used to match a load impedance 100 + jl 00 (Ω) to a lossless transmission line of characteristic impedance 300 (Ω). The spacing between the stubs is 3λ/8, with one stub connected directly in parallel with the load. Determine the lengths of the stub tuners
(a) if they are both short-circuited, and
(b) if they are both open-circuited.
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