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GATE 2014 EC (EC4) – Question 35

Electromagnetics · Antennas and Antenna Arrays · 1 mark · Multiple choice

Match 1: point electromagnetic source; 2: dish antenna; 3: Yagi–Uda antenna, with P: highly directional; Q: end fire; R: isotropic.

  1. 1–P, 2–Q, 3–R
  2. 1–R, 2–P, 3–Q
  3. 1–Q, 2–P, 3–R
  4. 1–R, 2–Q, 3–P

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Show answer and explanation

Correct answer: (B) 1–R, 2–P, 3–Q

Explanation

The ideal point source is isotropic, the parabolic dish is highly directional, and the Yagi-Uda antenna is an end-fire array. Thus the matching is **1→R,2→P,3→Q,B**. Isotropic is an ideal reference pattern rather than a physically realizable point antenna.