Induced field ratios for metal and dielectric struts with application to blockage in symmetrical reflector antennas
The induced field ratio (IFR) is an important parameter that determines the amount of blockage resulting from supporting struts in reflector antennas. The authors give a basic expression for the blockage in symmetrical antennas and show computed IFR values for four different struts with circularly symmetrical cross sections: metal cylinders, solid dielectric cylinders, dielectric tubes, and dielectric cylinders with a metal core. The results are presented in two different diagrams. One provides a general insight into the behaviour with size (or frequency), and the other is useful when comparing different possible struts in a practical design
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.