Course:

Simulation of Aperture Antennas

<>In this four lessons course, (1) we will discuss the linear wire antenna (dipole). This antenna, also called a doublet, is one of the simplest types of antenna, and constitutes the main RF radiating and receiving element in various sophisticated types of antennas. (2) we will discuss one of the most popular broadband antennas that provides circular polarisation, a desired extra feature for many applications, the helical antenna. The helical antenna is one of the simplest to construct since the dimensions are not critical. Generally, the antenna consists of a helix of thick wire or rod, connected to the inner conductor of a coaxial line, and a ground-plane screen connected to the braid. Helical antennas are used mostly as UHF antennas and SHF antennas. (3) we will see two important cases of rectangular aperture with a non-uniform distribution. The first one is the cosinus distribution and the second one is the parabolic distribution. We use non-uniform distributions in order to decrease the level of the secondary lobes seen in the uniform distribution. (4) we will finally study two examples of non-uniform distributions in the last lesson.

Note that the interactive simulations used in those four lessons could be used as learning objects independently to compose a course. Java simulation source codes are available under Gnu Public Licence.

 
  Description

Lessons:

  1. Dipole Antenna
  2. Helical Antenna
  3. Rectangular Aperture with a non-uniform Distribution
  4. Rectangular Aperture with a Uniform Distribution
  • Literature