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A method of design Ka-band E-faced-folded compact waveguide magic-T junction is presented. The design implements a stepped conducting cylinder to obtain the excellent performance. The results show that the return loss of the magic-T junction is less than −20 dB and the average insertion loss is more than −0.1dB in the 4GHz frequency bandwidth. The E-H and 1–2 port isolations are less than −25dB. In...
Phase quantization errors appear in phased array antenna utilizing the digital phase shifter for beam steering. And this cause relatively high parasitic side-lobes. This paper demonstrates the application of genetic algorithm (GA) in reducing the phased quantization errors effects on parasitic side-lobe level of phased array antenna. GA has the ability to escape from local minima and maxima and is...
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