Yagi-uda Antenna Calculator

November 07, 2024 Post a Comment

Yagi-uda antenna calculator

Designing a Yagi Uda Antenna Reflector length =150/f(MHz) =150/106=1.41 Meters. Driven element length =143/f(MHz) =143/106=1.35 Meters. First Director length =138/f(MHz) =138/106=1.30 Meters. Second Director length=134/f(MHz) =134/106=1.26 Meters.

How is Yagi antenna gain calculated?

The antenna gain is a function of the number of dipole elements : GT = 1.66 * N where N is the number of elements in the Yagi antenna.

What is the radiation of a Yagi-Uda antenna?

The frequency range in which the Yagi-Uda antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands.

How can I increase my Yagi-Uda antenna?

In the designs of yagi-uda antennas, directors play a key role in achieving better gain and directivity. Usually, their length is 5% smaller than the active element i.e. lies between 0.4λ to 0.45λ. Generally, gain is enhanced by adding number of directors as well as by optimizing the spacing between them.

How is antenna range calculated?

To calculate the range of an antenna, you multiply the square root of the antenna's height above water (in feet) by 1.42. The product will equal the antenna's communication range in miles.

Can you use 2 Yagi antennas?

When using multiple yagis, they should ideally be mounted at least 10 ft apart and not pointed at each other to prevent any interference. Then use a signal splitter to combine the two antennas into one cable that can be attached to the amplifier.

How far can a 4 dBi antenna reach?

With the 4dBi antenna, theoretically a distance of about 300 meters can be covered.

What is the formula for antenna gain?

GdB = 10 log10 (4πηA/λ2) GdB is the antenna gain, η is the efficiency, A is the physical aperture area, λ is the wavelength of the signal.

What does 2.1 dBi gain mean?

Unity gain (2.1 dBi) is a way of describing an antenna that outputs a signal at the same level at which it is input. The broad radiation pattern of unity gain antennas is less likely to be obstructed by buildings, bushland and hilly terrain.

How far will 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).

Should a Yagi be vertical or horizontal?

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 is the frequency range of Yagi Uda?

The frequency of Yagi-Uda antenna ranges between 3 MHz to 300 GHz. Frequencies ranging between 3 MHz and 300 GHz are categorized into VHF, LF, UHF, HF, SHF and EHF [1-6].

Do Yagi antennas need line of sight?

If there is no line of sight, a Yagi antenna will not perform well. Increasing the gain of an omni antenna results in less energy sent vertically and more energy sent horizontally, extending the range.

Does a Yagi antenna need a balun?

You will need a 1:1 balun or choke at the feedpoint of a Yagi to ensure pattern symmetry and best long term results but why is this needed? Coax is a wonderful product. It's invention has allowed the feeding of antennas through a manner of different substances, conditions and places a balanced feed line could not.

What is better than a Yagi antenna?

Omnidirectional Antennas While a Yagi antenna or other directional antenna will only pull in signal from one narrow direction, omni antennas can pull signal from elsewhere. In fact, that's what makes the omnidirectional antennas perfect for most uses.

What is the formula for antenna length?

The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole.

How is antenna size measured?

For licence test I took this approach after reading everyone's post & searching though all the technical details you posted.

Convert Frequency to wavelength in meters.
Multiplying 39 × wavelength in meters = inches of full Antenna length.
Divide inches by 2 for 1/2 wave.
Divide 1/2 wave by 2 for 1/4 wave.

What is the minimum antenna length?

Minimum size of the antenna should be one-fourth of the wavelength of the signal used.

What should be the distance between two antennas?

This simple calculation shows us that if we are deploying 2.4 GHz antennas, they should be spaced at a minimum of 4.92 inches apart as a starting point to prevent coupling or other issues.

How far can a 2.4Ghz antenna reach?

Many people are hindering their access to Wi-Fi in their homes solely due to the location of their router. Wi-Fi signals will usually reach about 150 feet or over 45 meters for a 2.4Ghz frequency. Using a 5Ghz frequency, you will get about 50 feet or about 15 meters of reach.