RESONANT GRIDDED REFLECTOR OPTIMIZATION STUDY.
Abstract
This report describes the work performed on a K-band gridded reflect-array (dipole elements). The theory of operation has been developed. This theory, corroborated by measurements, shows that the gridded reflectarray possesses certain limitations when the diameter exceeds several wavelengths. Notably, the aperture blocking by the peripheral elements becomes unduly large. Phase error also contributes to a loss in gain. A convenient four-dimensional phase error plot has been conceived and used, which yields even further insight into the operation of the gridded reflectarray. An alternate approach, using dipole layers to simulate a parabola has been evolved. Again the theory and measurements show this technique to be superior in gain and overall beamshape characteristics. This dish was tested alone, and by using it as the bottom feed in a flyswatter application, and was found to meet the project goals. Extensive use of IBM programming and computing services was made in studying the techniques applied to both approaches. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0818631