# How is Yagi-Uda antenna calculated?

## How is Yagi-Uda antenna calculated?

Designing a Yagi Uda Antenna

1. Reflector length =150/f(MHz) =150/106=1.41 Meters.
2. Driven element length =143/f(MHz) =143/106=1.35 Meters.
3. First Director length =138/f(MHz) =138/106=1.30 Meters.
4. Second Director length=134/f(MHz) =134/106=1.26 Meters.
5. Length of Boom=(43/106) + (45/106) + (45 /106)= 1.25 Meters approximately.

What is Yagi antenna design?

The Yagi antenna design has a dipole as the main radiating or driven element to which power is applied directly from a feeder. Driven element: The driven element is the Yagi antenna element to which power is applied. It is normally a half wave dipole or often a folded dipole.

What are the parameters to be considered for the design of a Yagi-Uda antenna?

The general guidelines for determining the size and shape of a Yagi antenna include accounting for the reflector length, driver length, director lengths, reflector to driver spacing, driver to first director spacing, and the spacing between the directors.

### At what range of frequency is the Yagi-Uda antenna usually used?

between 3 MHz to 300 GHz
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].

What is the advantage of Yagi-Uda antenna?

Benefits or advantages of YAGI Antenna | YAGI UDA Antenna ➨It offers wide bandwidth due to use of folded dipole. ➨It offers unidirectional radiation pattern which is reasonably good. ➨It offers substantial increase in directivity and gain compare to simple dipole antenna. ➨It is lower in cost and simple to build.

How do you increase the gain of a 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.

## What are the 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 are the three basic elements in Yagi-Uda antenna?

It is the most popular and easy-to-use type of antenna with better performance, which is famous for its high gain and directivity. DESIGN: In the Yagi-Uda antenna, there are mainly three element-Reflector, Directors, Driven element. The center rod-like structure on which the elements are mounted is called a boom.

What are the disadvantages of Yagi Uda antenna?

### How do you increase the gain of a Yagi Uda antenna?

What is true about Yagi-Uda 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.

What is the frequency range of a Yagi Uda antenna?

Frequency range The frequency range in which the Yagi-Uda antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands. Construction of Yagi-Uda Antenna A Yagi-Uda antenna was seen on top of almost every house during the past decades.

## What is a Yagi-Uda antenna?

The Yagi-Uda antenna or Yagi Antenna is one of the most brilliant antenna designs. It is simple to construct and has a high gain, typically greater than 10 dB. The Yagi-Uda antennas typically operate in the HF to UHF bands (about 3 MHz to 3 GHz), although their bandwidth is typically small, on the order of a few percent of the center frequency.

How are Yagi antennas designed?

Yagi antenna design is done most often via measurements, and sometimes computer simulations. For instance, let’s look at a two-element Yagi antenna (1 reflector, 1 feed element, 0 directors). The feed element is a half-wavelength dipole, shortened to be resonant (gain = 2.15 dB).

What are lobes in Yagi Uda antenna?

Various parts of a radiation pattern are referred to as lobes, which may be major, minor, side or back lobe. There are many other types of radiation patterns in Yagi Uda antenna, which are Isotropic antenna, omnidirectional antenna, Directional antenna, hemispherical antenna.