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Electricity is a scarce resource and ought to be saved. Users are often reluctant to save electricity because of many reasons, one of which is the physical effort that it entails. We present a method of saving electricity through the use of wireless smart plugs communicating to a wireless smart controller which have been designed and constructed so as to provide refined energy consumption information...
This work has been focused to describe the development and implementation of an automated system for measurement and characterization of planar active arrays. This automated system is capable of reducing time and operative cost and it is based on multilayer hardware architecture and the control software. The motivation of this work is the calibration of one triangular active array panel of the Geodesic...
This work has been focused to describe the development and implementation of an automated system for measurement, characterization of planar active arrays. This automated system is capable of reducing time and operative cost and it is based on multilayer hardware architecture and control software. The system has been tested on one triangular active array panel of the Geodesic Antenna Array (GEODA)...
The increasing interest in MIMO (Multiple-Input Multiple-Output) systems has given rise to a prolific research activity in this topic in recent years. Several aspects have been studied, including both theoretical and practical issues. However, so far few MIMO testbeds or prototypes have been done for DVB-T or future standards. In this paper, a novel 2 times 2 MIMO testbed has been realized which has...
In this paper, we describe the sensitivity and impedance measurement method for UHF RF identification (RFID) chips. The measurements are performed using an RFID tester (RFID reader with variable output power and frequency) and a vector network analyzer. No special impedance matching is required: chips can be connected to standard 50-Omega connectors allowing the sensitivity and threshold impedance...
GEODA is a multiple planar array smart antenna that is being developed in order to receive and track several satellite signals simultaneously. GEODA antenna has an special structure that allows receiving signals from 5deg to broadside in elevation and 360deg for azimuth in the 1.7 GHz working band. Several arrays shape the antenna and work independently since they have their own complete receiver...
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