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Uniform Transmission Lines
pairs as required, since the topology pointer (N in Section 4.1.3) is incremented
in the subroutine for that particular component.
Example 4.2. A three-stub transmission line filter, to be designed in Section
9.1, is shown in Figure 4.9. It is composed of three shorted stubs that are
separated by cascaded transmission lines. All elements are 90 degrees long at a
bandpass center frequency of 4700 MHz (2.9531 EIO radians). The characteristic
impedance is normalized, so that Zo = 1 is assumed. Loss for each of the
line lengths is 0.05 nepers, or 0.4343 dB. The hand-held calculator, pairedregister
topological description is shown in Table 4.3.
8S
.) 2 0
'" 1 8