How long is a 900 MHz antenna?
How long is a 900 MHz antenna?
For a dipole antenna to operate optimally at its specified frequency, its length must be equivalent to a half wavelength of the operating frequency. In the 900 MHz range, this equals approximately 16.6cm (a full wavelength is 33.3cm).
How far can a Yagi antenna reach?
How Far Can a Yagi Antenna Reach? A typical Yagi is effective up to 5 miles – but generally speaking will work best up to around 3. If you’re seeking to amplify cell signal, Yagi antennas come with either 50 or 75 ohm configurations, depending on the use case of your system (commercial or consumer usage).
Are Yagi antennas any good?
Yagis are directional antennas. Their high gain gives these antennas relatively good range. They have the most gain for their physical size compared to antennas like log periodics. The antenna’s design filters out almost all signal noise coming from the opposite direction.
How far can 900 MHz travel?
The lower frequency radio waves of 900 MHz radios provide greater penetration through walls, trees and other obstacles, making it optimal for most non-line-of-sight applications. A typical AW900xTR Radio using high powered AW-15 15dbi antenna can go distances of up to 1500 feet with buildings and/or trees in the way.
What is a Yagi type antenna?
A Yagi–Uda antenna or simply Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; these elements are most often metal rods acting as half-wave dipoles.
Will a 2.4 GHz antenna work for 900 MHz?
1 Answer. The wavelength, and hence the antenna design for 2.4 GHz is ~12.5 cm, but the wavelength for 900 MHz is ~33 cm. There would be a number of issues, including poor impedance match and decreased radiation efficiency, with an unknown radiation pattern.
Does Yagi antenna need line of sight?
Yagi antennas are best used in line-of- sight radio systems because Yagis focus the radio signal in a specific direction. Note the lack of a signal very close to the antenna. Most dipole omni antennas have a minimum distance for optimum signal reception.
How do I orient a Yagi antenna?
A Yagi antenna should also be pointed so that the largest fins are closest to the mast and the shortest fins pointed at each other. For Omni directional antennas, they should be in most cases pointed directly vertical. That is to say, pointed directly up into the sky.
What are the drawbacks of Yagi antenna?
Disadvantages of yagi UDA antenna:
- It is sensitive to frequency.
- It does not offer very high gain limited around 20 dB.
- The design is obstructive in nature.
- Bandwidth is reduced if a number of director element is used in the array.
- Need a large number of elements to be used.
- It is prone to noise.
What is a Yagi antenna used for?
A Yagi antenna is used for communications in a medium range of three to five miles between two points. It can also be used as a bridge antenna to connect clients to an access point. This term is also known as a Yagi-Uda array or patch antenna.