COMMUNICATIONStance along a radius expressed as fractions of a radius X/R for the relative diameter D/X equal to 4. The graph of the intensity of radiation of the wave of normal electric field is labeled EX and that of the wave of tangential magnetic field is labeled HT. The quantities Eo and Ho could not be measured. The experimental data for the E.v wave is normalized for the central maximum. The data are averages of those on both sides of center, taken over a complete diameter. The agreement between calculations and measured values is generally better than the agreement between measurements on the two halves of the diameter except near the edge of the disk.
An experimental %-element phased-array antenna is described that has been matched to operate over nearly an octave. Techniques used in designing the aperture-matching networks are discussed and experimental results are presented.The array aperture is formed by broad-band digital latching femte phase shifters in a closely stacked triangular coniiguration. For experimental convenience the array is horn fed from the rear. Matching of this antenna was accomplished by placing double-step dielectric transformers on the input and radiating a p e h e s . Resonances caused by the dielectric transformer on the aperture are discussed. The array operates from 3.5 to 6.5 GHz with scanning to f60' in all directions. The bandwidth is limited at the low end by magnetic resonance of the ferrite phase shifter and at the high end by the aperture resonance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.