Biomaterial devices on Arecanut palm leaf for microwave applications

This paper presents an investigation on the possibility of arecanut palm leaf as a biomaterial substrate for various microwave devices such as transmission lines, antenna, filter and a radio frequency identification device (RFID). The dielectric properties of naturally available arecanut palm leaf is characterized at microwave frequency region. A Microstrip patch antenna is designed and fabricated on this material using parasitic coupling and its characteristics are analyzed and presented. The antenna is operating at wide frequency band with considerably high gain throughout the bands. A basic band pass filter is also designed using microstrip transmission line topology. A four-bit RFID is presented as a proof of concept with different types of resonators. Four bits are chosen in this work but can be extended to n-bits by inserting n-resonators in the tapered transmission line depending on the space availability and by extending the transmission line to form an n-bit RFID.