Abstract: Concept of ringed stacked patch antenna with low side lobe level and enhanced bandwidth is introduced for radio altimeter avionics applications. One dimensional electromagnetic band gap is ...

Abstract: In this paper, we propose two solutions to the problem of joint transmit-receive antenna selection in a multiple-input multiple-output (MIMO) cognitive radio (CR) system. Our objective is to ...

This is basic information for people with no prior knowledge of Amateur Radio, DX and Radiosport. There are millions of people all over the world who, in their leisure time, use the radiowaves as ...

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