I would like to obtain a circular polarisation for antenna working at 5.8 GHz using a simple feeding no need to an external device. A bandwidth around 150 Mhz without using two orthogonal excitations or coupler device.
Polarisation can be obtained by Partially Reflective Surface in the place of High Impedance Surface? And it is more efficient technique in the place of polarisation technique feed of the antenna?
It s known that PRS controls attenuation coefficient and HIS allows to change the phase.
Dear mohamed,
you can also get the circular polarization by embedding a orthogonal slots on patch and also reduce the size of antenna,optimized this with the help of any simulation software.
You can do this using a wire helix antenna, as invented by John Kraus.
Very simple and easy to make.
There is a lot of design information in standard textbooks and on the web, e.g. http://www.daycounter.com/Calculators/Helical-Antenna-Design-Calculator.phtml
Dear mohamed,
Please follow Balanis 14th chapter design rules of NB circular polarization antennas.
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