An antenna with electrical length equal to half the wavelength is called what?

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Study for the Information Systems Technician Second Class (IT2) Advancement Exam with our extensive set of flashcards and multiple-choice questions. Each question is accompanied by hints and thorough explanations. Enhance your knowledge and prepare for success!

Multiple Choice

An antenna with electrical length equal to half the wavelength is called what?

Explanation:
An antenna that is one-half of a wavelength long forms a standing-wave current distribution with a maximum at the center and zeros at the ends. This resonance makes it an efficient radiator, and when fed in the middle, it behaves as a half-wave dipole with a practical input impedance (around 70–75 ohms in free space) and a broad pattern perpendicular to its axis. Because its electrical length is exactly one-half of a wavelength, the proper name for this type of antenna is a half-wave antenna.

An antenna that is one-half of a wavelength long forms a standing-wave current distribution with a maximum at the center and zeros at the ends. This resonance makes it an efficient radiator, and when fed in the middle, it behaves as a half-wave dipole with a practical input impedance (around 70–75 ohms in free space) and a broad pattern perpendicular to its axis. Because its electrical length is exactly one-half of a wavelength, the proper name for this type of antenna is a half-wave antenna.

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