Abstrak -RF Energy Harvesting adalah sebuah teknologi memanen ambient energi dari peralatan yang wearable. Salah satu peralatan wearable yang dapat bertindak sebagai sumber adalah end device Long Range Accesss (LoRa). LoRa adalah bagian dari Low Power Area Network (LPWAN) yang beroperasi pada unlicensed frequency (ISM). Sebagai sebuah teknologi nirkabel, end device LoRa akan ditempatkan pada remote area yang sulit untuk diakses. End device LoRa bertindak sebagai transceiver yang mengirimkan data dan juga menerima data dari gateway. Sebagai sebuah transceiver, end device LoRa membutuhkan ketersediaan energi. Pada remote area, RF ambient energy dari end device LoRa dapat dimanfaatkan sebagai sumber energi RF yang dapat dipanen dan disimpan. Paper ini mendiskusikan tentang bagaimana memanen energi ambient RF yang dipancarkan oleh end device LoRa menggunakan antena mikrostrip sebagai penangkap energi dan menambahkan sebuah rangkaian voltage multiplier sebagai penyearah sekaligus pengali tegangan. Berdasarkan hasil uji yang telah dilakukan, energi yang dipanen dari satu end device dan tersimpan sementara di kapasitor adalah sebesar163 pJ dengan jarak 11 cm dari sumber. Energi yang dipanen ini dapat disimpan pada baterai atau capasitor bank untuk digunakan di masa mendatang. Kata kunci -RF energy harvesting, end device LoRaAbstract -RF Energy Harvesting is a technology that harvest RF ambient energy from the wearable things. One of wearable thing that can act as a source is end device Long Range Access (LoRa). LoRa is part of Low Power Wide Area Network (LPWAN) which operate in unlicensed frequency (ISM). As a technology of wireless network, end devices of LoRa will be taken in remote area that hardly to access. End device LoRa acts as a transceiver that transmits and receives data from the gateway. As a transceiver, the LoRa end device requires energy availability. This journal discusses how to harvest the RF ambient energy emitted by the LoRa end device using the microstrip antenna as the receiver and the voltage multiplier as both a rectifier and a voltage multiplier. The energy harvested from one end device and stored temporarily in the capacitor is 163pJ with a distance 11 cm from the source. This harvested energy can be stored on battery or capasitor bank to be used in future.Keyword -RF energy harvesting, end device LoRa I. PENDAHULUANTeknologi dalam memperoleh dan memanfaatkan sumber energi yang ada atau terbuang untuk menjadi energi yang dapat dipakai dalam keseharian terus berkembang. Salah satu teknologi tersebut adalah energy harvesting atau disebut juga pemanenan energi. Energy harvesting memanfaatkan energi ambient pada peralatan-peralatan yang dapat dipakai manusia dalam keseharian. Peralatan-peralatan tersebut adalah peralatan komputasi kecil berbasis sensor yang melekat pada diri manusia untuk kebutuhan tertentu seperti melacak secara berkala,
Precision, Navigation, and Timing (PNT) system based on Global Navigation Satellite System (GNSS) becomes significant in the air, land, and sea traffic management. Integrity of GNSS is significant to provide a reliable real time PNT system such as CORS (Continuously Operating Reference Stations). GNSS Interference due to intentional or unintentional surrounding signal source may decrease the integrity of GNSS signal. Monitoring and identification of potential GNSS interference sources in the surrounding environment of CORS is significant. This paper proposed a methodology to reduce potential GNSS interference in a planned CORS site by first simulating the radiation pattern of potential source of interference to GNSS signal in the planned CORS sites. Thereafter ambient noise levels in the location of CORS may be measured to provide a reference point for analyzing the other potential sources of interferences. Based on these results, optimal location of CORS is chosen with the lowest possible unintentional interference signal from their surrounding. Measurement has been conducted in the location of CORS owned by BIG (Indonesian Agency for Geospatial Information), which is located in the rooftop of a building neara telecommunication tower.This method is necessary for CORS site planning to reduce potential GNSS interference sources in the environment of alternative sites.
Precision, Navigation, and Timing (PNT) system based on Global Navigation Satellite System (GNSS) becomes significant in the air traffic management, especially in the use of Automatic Dependent Surveillance Broadcast system (ADS-B) for air traffic monitoring. Therefore the integrity of GNSS is significant to provide a reliable data necessary for ADS-B. GNSS Interference due to intentional or unintentional surrounding signal source may decrease the integrity of GNSS signal and therefore may result in the in-accurate position data of ADS-B message. ADS-B message itself is also vulnerable from potential security threats in their network. This paper proposed a methodology to detect potential security threats of ADS-B network system for both GNSS signal and ADS-B data by measuring and monitoring the electromagnetic radiated emission from ethernet cable IPv4 Cat5.
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