Analysis Of Reflector Antennas Research Articles

Coverage shaping of contoured-beam antennas by aperture field synthesis

A synthesis method for high-gain antennas with beams of elliptical or even more complicated crosssections is developed. The desired beam contour is realised in an offset reflector with circular aperture illuminated by a single feed by optimising the phase of the aperture field. A number of cases are presented in which the desired contour is an ellipse. The results are checked by a reflector antenna analysis program using physical optics.

Evanescent-wave tracking: new approach to the analysis of large reflector and aperture antennas

A new method based on local evanescent-wave tracking is proposed for the analysis of large reflector and aperture antennas.

Book reviews - Analysis of reflector antennas

The Analysis of the Reflector Antenna is a monograph which documents the recent advances in the theory of reflectors developed during the space program and particularly of the work at the Jet Propulsion Laboratory. It is written for the engineer who needs to understand the design and performance limitations of reflector antennas. While it is not a text book, it may also prove useful in engineering introduction courses on diffraction. The book is divided into three sections: 1) the mathematical theory of diffraction, 2) the definition and calculation of antenna parameters, and 3) the use of digital computers in the analysis and design of reflector antennas and feed systems.

A comparison of geometrical theory of diffraction and integral equation formulation for analysis of reflector antennas

Four two-dimensional reflector antennas, the Strip, the corner, the trough, and the inverted trough, are analyzed independently by both the geometrical theory of diffraction (GTD) and integral equation formulation (IEF). A comparison of the radiation patterns calculated by these two methods shows that for intermediate-sized structures ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5-5\lambda</tex> ), the agreement between the two methods is excellent. (Comparison with measured patterns is given where these are available in the literature.) Extensive calculations are also carried out to determine the ranges of validity of the methods, i.e., exactly how small a structure GTD can treat and how large a reflector IEF can adequately handle. A qualitative assessment of the relative merits of the two methods is also presented.