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Deployment of Long Term Evolution (LTE) on unlicensed bands has been discussed recently in the 3rd Generation Partnership Project (3GPP) Release 13, which is also called LTE Licensed-Assisted Access (LAA) to unlicensed bands. Due to the unlicensed feature, other systems such as Wi-Fi and radar would operate on these bands. In order to avoid the interference, some management mechanism needs to be considered...
A 60 GHz micro-radar in 90 nm CMOS for non-contact vital sign and small vibration detections was designed and tested. A quadrature receiver embedded in the indirect up- and down-conversion architechture solves the null detection point issue and increases the robustness of the millimeter wave system. In the 60 GHz core, lumped-element-modeled passive components are extensively used to achieve a compact...
Coupled-resonator network is applied to the design of a rat-race coupler with bandpass response in this paper. Net-type resonators are used to reduce the circuit size and control the harmonics. As a result, the proposed coupler exhibits not only a compact size but also good stopband rejection. The proposed coupler occupies only one sixth area of the conventional design, while the rejection level in...
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