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Question 551

What is a use for a Wilkinson divider?

  1. To divide the operating frequency of a transmitter signal so it can be used on a lower frequency band
  2. To feed high-impedance antennas from a low-impedance source
  3. To divide power equally between two 50-ohm loads while maintaining 50-ohm input impedanceCorrect answer
  4. To divide the frequency of the input to a counter to increase its frequency range

Explanation

A Wilkinson divider splits input power equally between two output ports while still presenting 50 ohms at the input, using two quarter-wave sections of about 70.7 ohms plus a resistor bridging the outputs. That bridging resistor isolates the two outputs from each other and dissipates nothing when the loads are balanced.

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Question 551: What is a use for a Wilkinson divider? · FCC Amateur Extra Class (Element 4) · Questena