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Cooperative spectrum sensing enables a Cognitive Radio (CR) networks to reliably detect primary users and avoid causing interference to primary user's communications, and data fusion technique is a key component of it. However, when the number of CR users tends to be large, the bandwidth for reporting their sensing results to the fusion center will be very enormous. In this paper, censoring schemes...
In this paper, the effects of parameters of substrate and ILH-MSA structure on radiation performances have been analyzed firstly, and then the available ranges of the parameters are given to ensure radiation performances of ILH-MSA. Secondly, an ILH-MSA operating at 1.6GHz is designed and fabricated as an example. Experiment results show that, the area of the present ILH-MSA is 49% of that of traditional...
Firstly, the paper designs a novel broad beamwidth microstrip antenna at 16GHz, whose 3dB beamwidth is up to 170 degrees. Then a conformal phased array on conical surface is designed by means of the present broad beamwidth microstrip antenna. To achieve effective beam scanning in whole elevation and rolling planes, the whole rolling plane has been divided into six sections. Numerical results show...
Based on the theoretical analysis of microstrip antenna (MSA) loaded with a shorting-pin, a novel MSA with broad beamwidth is proposed. In the structure, multiple layers are used to achieve high radiation efficiency, while a conducting cylinder and a coupling aperture are applied to excite multiple modes to obtain broad beamwidth. Finally, a novel MSA is designed and fabricated as an example. The...
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