Omni directional antenna is an antenna that has 360 degrees of coverage. Observe the uniform circular pattern. The antenna is truly omni directional and offers no gain. Observe the distinctive peaks of dB every 120 degrees. This is due to the gain characteristics. Omnidirectional antennas are a subset of the directional antennas, which have the property of radiating or receiving electromagnetic waves more effectively in some directions than in others. The general procedure has been outlined. There are, however, certain guidelines that should be followed that are specific to each procedure have slotted waveguide omni directional antenna is acting as probe antenna so it was our transmitter and acted as a receiver antenna. In this lab, during conducted faced many errors and manage to rectify it. This are the errors faced, the reflective bodies of our caused fluctuations in readings. The movement of people around the field caused fluctuations in readings. Movement of the attenuator caused fluctuations in readings. The pole and rotator box altered some of the radiation patterns. The movement and positioning of the coaxial cable altered patterns. The wrong mounting of the antennas caused altered readings. The increasing temperature of the transmitter lowered dB levels. Operator error. Antenna design issues.
CONCLUSION
This lab was successfully conducted and the objectives of this lab, to plot the radiation pattern of an omni directional antenna have been achieved. From this la b, learn to be familiar with the t he most popular antenna design programs and different parameters associated with the specific antenna. While directional antennas can be of great value for certain indoor applications, the huge majority of indoor installations utilize omnidirectional antennas for the reasons mentioned in lab. The selections of an antenna, directional or omnidirectional, should be strictly determined by a correct and proper site sit e survey.
DISCUSSION
Directional antennas focus energy in a particular direction. This directional antenna is an antenna that has 360 degrees of coverage. Directional antennas are used in some base station applications where coverage over a sector by separate antennas is desired. Point to point links also benefit from directional antennas. The antenna radiation pattern is a measure of its power or radiation distribution with respect to a particular type of coordinates. We generally consider spherical coordinates as the ideal antenna is supposed to radiate in a spherically symmetrical pattern. In this lab, during conducted faced many errors and manage to rectify it. This are the errors faced, the reflective bodies of our caused fluctuations in readings. The movement of people around the field caused fluctuations in readings. Movement of the attenuator caused fluctuations in readings. The pole and rotator box altered some of the radiation patterns. The movement and positioning of the coaxial cable altered patterns. The wrong mounting of the antennas caused altered readings. The increasing temperature of the transmitter lowered dB levels. Operator error. Antenna design issues.
CONCLUSION
This lab was successfully conducted and the objectives of this lab, to plot the radiation pattern of a directional antenna have been achieved. From this lab, learn to be familiar with the most popular antenna design programs and different parameters associated with the specific antenna. While directional antennas can be of great value for certain indoor applications the reasons mentioned in lab.
