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RF enerji hasadı, ortamda bulunan elektromagnetik sinyalleri kullanarak DC enerji üretmektedir. Günümüzde elde edilen enerjiyi arttırmak amacıyla çoklu frekansta RF enerji hasadı çalışmaları yapılmaktadır. Bu çalışmada, çift bantlı RF enerji hasadı için tek empedans uyumlama yapısı ve her bir frekans için ayrı ayrı L tipi empedans uyumlama yapısı çıkış voltaj ve verimleri göz önüne alınarak karşılaştırılmıştır. Simülasyonu yapılan frekans bantları ortamda bulunma yoğunluğu yüksek olan GSM 900 ve GSM 1800 bantlarıdır, bu nedenle 900 MHz ve 1800 MHz frekansları kullanılmıştır ve gerilim çoklayıcı olarak iki kademe Dickson gerilim çoklayıcı seçilmiştir. Çoklu bant empedans dönüştürücü için indüktör ve kapasitörlerden oluşan toplu eleman devre yapıları seçilmiştir. Böylece empedans uyumlama devresi çift bantta yükten kaynağa olan yansımaları bastırmıştır ve maksimum güç transferi sağlanmıştır. Bu yapı için maksimum verimler 900 MHz, 1800 MHz ve çift bant (900&1800 MHz) için sırasıyla 41.947 %, 29.259 %, ve 74.427 % olarak bulunmuştur.
RF energy harvest produces DC energy using the electromagnetic signals found in the environment. For the purpose of increasing the energy obtained today, multi-frequency RF energy harvest work is carried out. In this study, double-band RF energy harvests were compared by taking into account the single empedans adjustment structure and the separate L-type empedans adjustment structure for each frequency, taking into account the output voltage and performance. The simulated frequency bands are the GSM 900 and GSM 1800 bands with high density of presence in the environment, so 900 MHz and 1800 MHz frequencies have been used and two-stage Dickson voltage multiplier has been selected as a voltage multiplier. For the multi-band empedans converter, the collective element circuit structures consisting of indutors and capacitors have been selected. Thus, the empedance adjustment circuit suppressed the reflections that are from load to source in the double band and the maximum power transfer was provided. The maximum performance for this structure was at 900 MHz, 1800 MHz and double band (900 & 1800 MHz) respectively 41.947%, 29.259%, and 74.427%.
RF energy harvesting generates DC energy using electromagnetic signals in the environment. Today, multi-frequency RF energy harvesting studies are carried out to increase the energy obtained. In this study, single impedance matching structure for dual band RF energy harvesting and L type impedance matching structure for each frequency are compared considering output voltage and efficiency. The simulated frequency bands are the GSM 900 and GSM 1800 bands, which have a high presence in the environment, so 900 MHz and 1800 MHz frequencies are used and two-stage Dickson voltage multiplier is chosen as the voltage multiplier.Lumped element circuit structures consisting of inductors and capacitors are selected for the multiband impedance converter. Thus, the impedance matching circuit suppress the reflections from the load to the source in the dual band and maximum power transfer was achieved. The maximum efficiencies for this structure are found to be 41.947%, 29.259% and 74.427% for the 900 MHz, 1800 MHz and dual bands (900 & 1800 MHz), respectively.
Field : Fen Bilimleri ve Matematik; Mühendislik
Journal Type : Uluslararası
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