Multistage Wilkinson Power Divider

Overview

Wideband power divider created by cascading multiple 2-way Wilkinson sections with progressively optimized impedances and resistor values.

Topology

           ┌───[Z1, λ/4]───────[Z2, λ/4]── * * * ───[ZN, λ/4]──── Output #1
           │               |              |                   |
Input  ────┤              [R1]           [R2]                [RN]
           │               |              |                   |
           └───[Z1, λ/4]───────[Z2, λ/4]── * * * ───[ZN, λ/4]──── Output #2

Advantages

  1. Wideband

  2. High isolation

    • Maintained across BW

Limitations

  1. Larger size

  2. Design complexity

  3. Higher loss

    • More TL sections, higher loss

  4. Cost

    • Larger PCB area

    See Also