Understanding Antennas (obj 2.3) Flashcards
(12 cards)
What is an omnidirectional antenna?
Sends and receives data in all directions with equal power
Commonly embedded in devices like wireless access points and cell phones; used when the signal direction is unknown or needs to reach multiple devices.
When is an omnidirectional antenna typically used?
When the signal direction is unknown or needs to reach multiple devices
Examples include wireless access points and cell phones.
What is a unidirectional antenna?
Focuses power in a single direction
Useful for long-distance communication or when limiting signal bleed-over is important.
What are the included variants of unidirectional antennas?
- Unidirectional left
- Unidirectional right
What is a parabolic antenna?
A specialized unidirectional antenna with a curved dish
Often used for microwave signals and satellite TV to focus energy toward a specific point.
What is the primary use of a Yagi antenna?
Point-to-point communication over long distances
Provides a focused, directional beam of signal.
What is a key characteristic of larger antennas?
Can increase signal range but require more power.
What should you understand for exam preparation regarding antennas?
- When to use each type of antenna
- Patch antennas for building-to-building communication
- Antenna types based on their characteristics (omnidirectional, unidirectional, parabolic, Yagi)
Fill in the blank: A _______ antenna sends and receives data in all directions with equal power.
[omnidirectional]
True or False: A unidirectional antenna is useful for long-distance communication.
True
Fill in the blank: A specialized unidirectional antenna with a curved dish is called a _______.
[parabolic antenna]
What type of antenna provides a focused, directional beam of signal?
[Yagi antenna]
