What type of antenna is used in an...

🔍 Key Concepts

• VOR (Very High Frequency Omnidirectional Range) operates in the VHF band and provides azimuth information to aircraft • How localizer (LOC) signals for ILS (Instrument Landing System) are transmitted and what polarization they use • The typical polarization (vertical vs horizontal) and radiation pattern (omnidirectional vs directional) for aircraft communication/navigation antennas

💭 Think About

• Think about how an aircraft in any bank angle or heading must receive the VOR and LOC signals reliably—what kind of radiation pattern helps with that? • Consider where VOR/LOC antennas are usually mounted on an aircraft and how that affects whether vertical or horizontal polarization is more practical. • Ask yourself which option describes a simple, robust antenna type that is common for VHF nav/comm systems on aircraft.

✅ Before You Answer

• Verify which polarization ( vertical vs horizontal ) is standard for VHF navigation signals like VOR and LOC. • Check whether VOR needs an omnidirectional radiation pattern relative to the aircraft for reception from any direction. • Eliminate any choices that clearly describe specialized or uncommon antenna types for typical aircraft VHF nav systems.

What type of antenna is used in an aircraft’s Very High Frequency Omnidirectional Range (VOR) and Localizer (LOC) installations?

Vertically polarized antenna that radiates an omnidirectional antenna pattern.

Horizontally polarized omnidirection reception antenna.

Balanced loop transmission antenna.

Folded dipole reception antenna.

🔍 Key Concepts

💭 Think About

✅ Before You Answer