EEE445_hw12sln

EEE445_hw12sln - EEE 591 Homework #12 Solutions 7.9 Design...

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EEE 591 Homework #12 Solutions 7.9 Design a Wilkinson power divider with a power division ratio of 3 1 2 3 P P , and a source impedance of 50 . Solution: 5774 . 0 3 1 3 1 2 3 2 K P P K 5 . 115 1 9 . 43 6 . 131 1 0 03 2 02 3 2 0 03 K K Z R Z K Z K K Z Z 6 . 86 9 . 28 0 3 0 2 K Z R K Z R Let’s also assume that we will use quarter-wave transformers to transform the output impedances back to 50 . 8 . 65 0 . 38 0 3 3 0 2 2 Z R Z Z R Z Q Q The schematic for the ADS analysis using ideal transmission lines is shown in Figure 1. A design frequency of 4 GHz was arbitrarily chosen. The return loss looking into each port is shown in Figure 2. The power ratios 1 2 P P and 1 3 P P are shown in Figure 3. The power ratio 2 3 P P is shown in Figure 4. And the isolation between the output ports is shown in Figure 5.
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TLIN TL5 F=4 GHz E=90 Z=65.8 Ohm TL4 E=90 Z=38 Ohm R R1 R=115.5 Ohm Term Term3 Z=50 Ohm Num=3 Term2 Num=2 TL3 E=90 Z=131.6 Ohm
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EEE445_hw12sln - EEE 591 Homework #12 Solutions 7.9 Design...

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