A SIMPLIFIED VARIABLE POLARIZATION ANTENNA,
Abstract:
Development of a simplified variable-polarization antenna was based on a waveguide feed arrangement in which a polarizing element and the input field were independently rotatable about the axis of propagation. A squeezesection polarizer with a cross section approaching an ellipse seemed particularly useful in applications at wavelengths. Such a polarizer was fabricated by squeezing round copper tubing in a roller device in which the amount and length of squeeze could be precisely controlled. With this variable-polarization antenna, linear polarization in any plane about the axis of propagation and rotating linear polarization may be easily obtained. Right or left circular polarization, also right or left elliptical polarization of any axial ratio between linear and circular may be selected. Author