The yagi UDA antenna is a particularly popular form of the antenna where directivity and gain must be required. The yagi UDA antenna offers many advantages over the other types of antennas in a lot of applications. However, it is necessary to weigh both advantages and disadvantages to ensure that the correct antenna type is chosen for any particular use.
Advantages of yagi UDA antenna:
- It is simple to build.
- It is a compact size and also it is must in lightweight.
- It offers wide bandwidth due to the use of folded dipole.
- It is lower cost because easy of handling and maintenance.
- It offers a unidirectional radiation pattern which is reasonably good.
- It offers substantial increases in directivity and gains compared to the considered simple dipole antenna.
- It can be easily mounted with standard mechanical fixings on vertical poles or other poles.
- High gain is achieved about to 7 dB.
- Less amount of power is wasted.
- Frequency coverage is broad.
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.
- It is also prone to atmospheric effect.
Conclusion :
The Yagi antenna is a very practical form of RF antenna design suitable for applications requiring gain and direction. Although the cost is higher than the basic antennas, the Yagi often offers the most cost-effective gain and directional option.