Video encyclopedia

Dipole antenna


Why dipole antennas are a half wave long


Basic Antenna Fundamentals


Antennas 101 / How does an antenna work


Physics - E&M: E&M Radiation (8 of 22) Dipole Antenna Radiation Pattern


ANSYS HFSS: Designing a Dipole Antenna - Part I

In radio and telecommunications a dipole antenna or doublet is the simplest and most widely used class of antenna. The dipole is any one of a class of antennas producing a radiation pattern approximating that of an elementary electric dipole with a radiating structure supporting a line current so energized that the current has only one node at each end. A dipole antenna commonly consists of two identical conductive elements such as metal wires or rods. The driving current from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the two halves of the antenna. Each side of the feedline to the transmitter or receiver is connected to one of the conductors. This contrasts with a monopole antenna, which consists of a single rod or conductor with one side of the feedline connected to it, and the other side connected to some type of ground. A common example of a dipole is the "rabbit ears" television antenna found on broadcast television sets.
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  • History 

  • Short dipole 

  • Dipole antennas of various lengths 

  • Half-wave dipole 

  • Folded dipole 

  • Other variants 

  • Vertical (monopole) antennas 

  • Impedance of dipoles of various lengths 

  • Radiation pattern and gain 

  • Feeding a dipole antenna 

  • "Rabbit ears" TV antenna 

  • Shortwave antenna 

  • Dipole towers 

  • Dipole arrays 

  • Yagi antennas 

  • Dipole as a reference standard 

  • Hertzian dipole 

  • Radiation resistance 

  • Detailed calculation of dipole feedpoint impedance 

  • Induced EMF method 

  • Integral methods