Design of Yagi Uda Antenna Using HFSS Software.

EXPERIMENT NO: 03

AIM: Design of Yagi Uda Antenna Using HFSS Software.

SOFTWARE USED: ANSYS HFSS 15.0.3

THEORY:

A Yagi–Uda antenna, commonly known as a Yagi antenna, is a directional antenna consisting of multiple parallel elements in a line, usually half-wave dipoles made of metal rods. Yagi–Uda antennas consist of a single driven element connected to the transmitter or receiver with a transmission line, and additional "parasitic elements" which are not connected to the transmitter or receiver: a so-called reflector and one or more directors. 

It was invented in 1926 by Shintaro Uda of Tohoku Imperial University, Japan, and (with a lesser role played by his colleague) Hidetsugu Yagi. The reflector element is slightly longer than the driven dipole, whereas the directors are a little shorter. This design achieves a very substantial increase in the antenna's directionality and gain compared to a simple dipole.

Also called a "beam antenna", or "parasitic array", the Yagi is very widely used as a high-gain antenna on the HF, VHF and UHFbands.
 (source: Wikipedia)

PROCEDURE:

1.       Open the HFSS software window.

2.      Go to file and create new.

3.      Press “Insert HFSS design” option in upper left side of window.

4.      Draw cylinder of random dimension in y-axis and set the following parameters.

1.      Go to create cylinder under antenna and set the following parameters.

It looks like this:

1.      Similarly create another cylinder for antenna 1 with following parameters value.

1.      Create cylinder of antenna 1 specification:

1.      Create cylinder of antenna 2 specification:

1.      Create cylinder of antenna 3 specification:

1.      Create cylinder of antenna 4 specification:

1.      Create cylinder of antenna 5 specification:

1.      Create cylinder of antenna 6 specification:

1.      Create cylinder of antenna 7 specification:

1.      Create cylinder of antenna 8 specification:

Create cylinder of antenna 9 specification:

1.      Create cylinder of antenna 10 specification:

1.      Create cylinder of antenna 11 specification:

1.      Create cylinder of antenna 12 specification:

1.      Create cone with following specification:

1.      Create small circle with following specification.

Finally the design looks like this: