Circularly polarized UHF RFID tag antenna for wireless sensing of complex permittivity of liquids

• Main Authors: Chen, Yi, Hua, Changzhou, Shen, Zhongxiang
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Electrical and electronic engineering; Circularly Polarized Antenna; Complex Permittivity
• Online Access: https://hdl.handle.net/10356/162485
• Institution: Nanyang Technological University

This paper presents a compact circularly polarized UHF RFID tag antenna based on complementary split ring resonator (CSRR). Its operating frequency varies with the injected liquid inside the proposed antenna, which is fabricated by 3D printing technology. Based on this feature, the complex relative...