Design a Compact Coplanar Wideband Antenna Used in Radio Frequency Identification Systems

Abstract

<jats:p>In this paper, a new compact coplanar antenna used for Radio frequency identification (FID) applications is presented. This antenna is operated at the resonant frequency of 2.45 GHz. The proposed antenna is designed on an epoxy substrate material type (FR-4) with small size of (40 × 28) mm2 in which the dielectric thickness (ℎ) of 1.6 mm, relative permittivity (er) of 4.3 and tangent loss of 0.025. In this design the return loss is less than −10 dB in the frequency interval (2.12 − 2.84) GHz and the minimum value of return loss is -32 dB at resonant frequency. The maximum gain of the proposed antenna is 1.22 dB and the maximum directivity obtained is 2.27 dB. The patch and the ground plane of the proposed antenna are in the same surface. The proposed antenna has a wide bandwidth and omnidirectional radiation pattern with small size. The overall size of the compact antenna is (40 × 28 × 1.635) mm3. The Computer Simulation Technology (CST) microwave studio software is used for simulation and gets layout design.</jats:p>

Design and Implementation of a Miniaturized Filtering Antenna for 5G Mid-Band Applications

“…With the emergence of wireless transmission and to attain a wide wireless connection of data, the antenna was invented as an element that provides an interface between the guided electrical signals and the electromagnetic waves [1]. However, most of the designed antennas have an effective out-of-band radiation, such as the antennas utilized for cognitive radio applications [2,3], Radio Frequency Identification (RFID) applications [4,5], Wireless Local Area Network (WLAN)/Worldwide Interoperability for Microwave Access (WiMAX) applications [6,7], C and X-band applications [8,9] and 5G applications [10,11]. Therefore, many microwave band-pass filters (BPFs) were proposed to suppress the unintended out-of-band radiation.…”