Rhombic Antenna The rhombic antenna is based on the principle of travelling wave radiator. By application of return conductor, two wires are pulled apart at a point so that diamond…

Lens Antenna Lens Antenna is an antenna which consists of an electromagnetic lens with a feed. In other words, a lens antenna is a three-dimensional electromagnetic device whose refractive index…

Babinet’s Principle Babinet’s principle states that the sum of the field at a point behind a plane having a screen and the field at the same point when a complementary screen…

Helical antenna is an antenna which has a helix or spring shape. Its polarisation and radiation properties depend on the diameter, pitch, number of turns, wavelength, excitation and spacing between…

The antenna which has the shape of horn is called as ‘Horn Antenna’. Its shape is as because of a waveguide has one end of which is flared out. A…