Desenvolvimento de antena de microfita compacta de baixo custo para leitor UHF RFID aplicada à logística hospitalar.

Abstract

This work presents the development of a low cost antenna for a frequency range considered for UHF (ultra high frequency) RFID readers applied in the logistics sector of the University Hospital of Piauí. The proposed antenna is made of recycled aluminum sheets. It consists of two parallel plates (ground plane and radiator) with an L-shaped plate (stub) between them and four short-circuit planars for impedance matching and mechanical support. the width bandwidth is 39.6 MHz and directivity is 3.1 dBi at 915 MHz and were obtained with the aid of of the CST Microwave Studio software. Experimental results in an anechoic chamber of a manufactured prototype showed that the antenna achieved the desired performance, with bandwidth of 38.2 MHz In the end, an application was proposed and the antenna obtained success in identifying a variety of items labeled with UHF tags for some distances demonstrating its potential to reduce costs in carrying out the inventory at the said hospital.