Monday 16 October 2017

Isotropic antenna and Dipole antenna

Isotropic antenna:
 An isotropic antenna is a theoretical antenna that radiates equally in all directions - horizontally and vertically with the same intensity. The antenna has a gain of 1 dB in the spherical space all around it and has an efficiency of 100%. The concept of an isotropic antenna is often used as a reference antenna for the antenna gain.




Dipole antenna basics:
  • The name 'di-pole' indicates that the dipole antenna consists of two poles or items – two conductive elements or simply 2 wire with proper length.
  • Dipole antennas are the most common type of antenna used and are omni-directional, propagating radio frequency (RF) energy 360 degrees in the horizontal plane
  • These are normally on the same axis,
  • The dipole antenna is normally split in the centre.
  • Most commonly used Dipole antenna is Half wave dipole antenna
  • Conducting element which is wire or metal tube which is an electrical half wavelength long. 
  • The antenna consists of the feeder connected to two quarter wavelength elements in line with each other.





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