What is a Yagi antenna?

The Yagi antenna is able to provide very useful levels of gain and front to back ratios. To obtain the required phase shift an element can be made either inductive or capacitive.

What happens when you add more directors to a Yagi antenna?

It is found that the addition of further directors increases the directivity of the antenna, increasing the gain and reducing the beamwidth. The length of successive directors is reduced slightly. To summarise the theory behind the directors and reflectors of a Yagi antenna:

How to choose the best HF antennas?

Choose from top-brand HF Yagi, HEXX beam, and other rotatable antennas to meet your high-frequency needs. Get a strong, clear signal with less noise from 2 meters through 40 meters with your choice of single- and multi-band Yagi antennas with up to 16 elements.

What are the limitations of Yagi anennas?

One limitation of the design of Yagi anennas is that the power in these additional elements is not directly driven. Accordingly the amplitude and phase of the induced current cannot be completely controlled. It is dependent upon their length and the spacing between them and the dipole or driven element.