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This paper describes a rectenna system for HIPERLAN and IEEE 802.11/Wi-Fi applications at 5.8 GHz. The proposed structure uses a modified circular disk patch antenna to collect the electromagnetic energy, a low pass filter for suppressing high order harmonics, a matching circuit to establish matching between the antenna and the rectifier, and a half wave rectifier to convert RF to DC. The antenna...
This work reports a real-time, non-invasive, compact and field deployable CO2 sensor using tunable diode laser spectroscopy (TDLAS). Direct detection and 2f-WMS was used to measure the gas parameters utilizing a low power vertical cavity surface emitting laser (VCSEL) emitting across 2003.5nm where CO2 has a strong absorption line. A Raspberry Pi microcontroller along with a serial analog-to-digital...
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