A new compact CPW-Fed dual-band monopole antenna for RFID applications

Abstract

<p>This paper presents a study of a new dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and covering free ISM bands of 2.45GHz and 5.8GHz. The proposed antenna benefits from the advantages of the CPW line to simplify the structure of the antenna into a single metallic level, by consequent making it easier for integration with microwave integrated circuits. The simulation of the antenna was carried out using ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. A good impedance bandwidth of 500MHz is achieved in measurement (from 2.1GHz to 2.6GHz for the lower band), while the upper band covers 800MHz (from 5.2GHz to 6GHz). Details of the proposed antenna design and both simulated and experimental results are described and discussed.<strong><em></em></strong></p>

A compact miniature fractal planar antenna for RFID readers

“…The proposed antenna has an omni-directional radiation pattern measured for H-plane and E-plane, as shown in Figure 9 and Figure 10. As illustrated in Table 4, The total size reduction obtained, compared to some antennas operate at the same frequency of 2.45GHz, is for example equal to 61.4% for the conventional rectangular patch antenna, 48.5% for the compact inverted Y slot rectangular microstrip patch antenna [11], 47.5% in the case of the dual band metamaterial printed antenna based on CSRR [15], 41.5% in the case of the compact CPW-Fed dual-band printed antenna [12], 41.2% compared to the miniature planar microstrip antenna using DGS [14], and 34.6% for the new compact CPW-Fed dual-band monopole antenna [13]. [15] 36 36 47.5 % Compact CPW-Fed dual-band printed antenna [12] 30.6 38 41.5 % Miniature planar microstrip antenna using DGS [14] 34 34 41.2 % New compact CPW-fed dual-band monopole antenna [13] 30.…”

“…The RFID system is used in many applications where fitting into smaller areas is required as logistics management, transport, health, and access control. This demand of small RFID devices sizes leads to develop new RFID antennas with small size and light weight structures [9] Many techniques are used to design a miniature antenna, as the slot technique [10][11][12][13], the fractal structure, the Defected Ground Structure (DGS) [14], or the use of metamaterial structure [15]. One of the techniques used to design easily a miniature antenna is the use of the fractal structures.…”

Design of a miniaturized wideband disc monopole antenna used in RFID systems

“…The solution of the main problems for the design of the proposed microstrip antenna are to achieve small size with wide bandwidth and suitable value of gain in addition to achieve best return loss value and VSWR that lead to get best performance for microstrip antenna. Many techniques are used to design a miniature antenna, as the slot technique [32][33][34][35], the fractal structure, the Defected Ground Structure (DGS) [36], or the use of metamaterial structure [37].…”