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The development of applications in millimetre waves domain is very important in the last years. For example, many studies have been done for indoor communications at 60 GHz, spatial communications in Q band (50 GHz), radar automotive applications (77 GHz). Microstrip technology should be attractive at these frequencies if one uses material with weak losses and a low cost technology. The most of substrates...
This paper deals with a multibeam antenna in 60 GHz band. This structure is based on a Butler Matrix which fed a four printed antenna array. Two different solutions are presented to avoid the crossing point of the microstrip line : a microstrip-thick slot-microstrip transition or two hybrids 90??. The authors present the feeding line network of the matrix and compare results for the two solutions...
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