Design and implementation of multiband microstrip antenna for energy harvesting

Abstract

Antennas are of great importance in energy harvesting systems. It is possible to collect more energy with RF energy harvesting systems by using multiband antennas. In this study, a microstrip antenna was designed and fabricated for operation at 307 MHz, 1721 MHz, and 5447 MHz frequency bands. The designed multiband antenna with size of 82.05x104.76x1.60 mm3 was optimized for collecting more energy and then, implemented on FR4 substrate. Return loss, voltage standing wave ratio, imaginary and real impedances of the manufactured multiband microstrip antenna were measured by vector network analyzer. The multiband antenna gain was calculated as 2.02 dBi. Furthermore, a good agreement was noted between the measurement and simulation results of the multiband microstrip antenna. As a result, it is determined that the produced multiband microstrip antenna is a useful and suitable antenna for RF energy harvesting circuits.

Keywords

• Microstrip antenna
• Antenna design
• Multiband
• RF signal
• Energy harvesting

Enerji hasadı için çok bantlı mikroşerit anten tasarımı ve uygulaması

Öz

Enerji hasat sistemlerinde antenler büyük önem taşımaktadır. Çok bantlı antenler kullanılarak RF enerji toplama sistemleriyle daha fazla enerji toplamak mümkündür. Bu çalışmada 307 MHz, 1721 MHz ve 5447 MHz frekans bantlarında çalışacak şekilde bir mikroşerit anten tasarlanmış ve üretilmiştir. Tasarlanan 82.05x104.76x1.60 mm3 boyutlu çok bantlı anten, daha fazla enerji toplayacak şekilde optimize edilmiş ve daha sonra FR4 altlığı üzerine uygulanmıştır. Üretilen çok bantlı mikroşerit antenin geri dönüş kaybı, gerilim duran dalga oranı, sanal ve gerçek empedansları vektör network analizörü ile ölçülmüştür. Çok bantlı anten kazancı 2,02 dBi olarak hesaplandı. Ayrıca çok bantlı mikroşerit antenin ölçüm ve simülasyon sonuçları arasında iyi bir uyum olduğu görülmüştür. Sonuç olarak üretilen çok bantlı mikroşerit antenin RF enerji hasat devreleri için kullanışlı ve uygun bir anten olduğu belirlenmiştir.

Anahtar Kelimeler

• Mikroşerit anten
• Anten tasarımı
• Çoklu bant
• RF sinyali
• Enerji hasadı

Kaynakça

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