A Miniature RFID Antenna at UHF Band using Meander-Line Technique

Abstract

<p><span>This paper displays a new design of a small antenna proposed for radio-frequency identification (RFID) applications in the UHF band (ultra-high frequency). Our antenna is constituted of two rectangular patches linked together with a meander line. Using this technique reduction in antenna size of equal to 62% with respect to the conventional antenna was achieved. The antenna has a simple structure and small antenna size of 60 x 74mm<sup>2</sup> or 0.184 <sub>λ0</sub> x 0.226 <sub>λ0</sub>. It has been fabricated on a low-cost FR4 substrate and measured to validate the simulation performances.</span><span>The measured bandwidth is around 54.4 MHz (889.3 - 943.7 MHz) with reflection coefficient less than 10 dB, which covers all of the American RFID band (902 - 928 MHz), Chinese RFID band (920.5 - 924.5 MHz), Korea Republic and Japan RFID band ( 917 - 923.5 MHz).</span><span>The design and simulations have been effected by electromagnetic simulators HFSS and CST microwave studio. A good accord is getting between the simulated and measured results. This antenna is intended for the reader of RFID applications.</span></p>

A rectangular CSRR based microstrip UHF reader patch antenna for RFID applications

“…As derived from previous equation, the free path loss (Lfs) or path loss against the distance between the Tx and Rx which in theory is defined in the Ground Reflection (Two-Ray) propagation model and expressed as below: (6) where; (7) The floor, wall, and glass coefficient is the values of ℎ . Given that losses of Tglass = 0.25 dB, Twall = 2.2 dB, and Tfloor = 13 dB respectively.…”

“…Therefore, reader antenna is an important unit as they are integral part of RFID systems. Among the applications, ultra-high frequency (UHF) radio frequency identification (RFID) systems receives a lot of attention because of their potential in item-level tagging such as sensitive products tracking, pharmaceutical logistics, transport and medical products (blood, medicines, vaccines), bio-sensing applications, and so on [3][4][5][6][7][8][9]. UHF band has always been the pursuit of RFID systems, because the frequency band varies from country to country.…”

Analysis, Design, and Manufacture of a Compact UHF RFID Tag Antenna for Operating in a Metallic or Non-Metallic Environments

“…Numerous techniques are proposed for the impedance matching such as T-match network [12], double T-matching structure [13] and inductively coupled loop [14]. Other techniques are used to reduce the antenna's dimensions including meandering [15], which increase the electrical length of the tag antenna, fractal, inverted-F antenna (PIFA), Split Ring Resonators (SRR) structures, and slot's technique which consists of cutting slots of different shapes from a patch antenna [16][17][18].…”

Development and implementation of a miniature RFID system in a shopping mall environment

“…al. [8], aimed to reveal RFID personnel control by the employer that can be managed via 4.5 G. In India, major current applications of RFID research being undertaken are on the antenna for RFID applications [9]- [12] and that has led to technological advancements. Moreover, various retail outlets in developed countries are making use of this tremendous technology to increase sales, improve customer satisfaction level, and increase their stockstaking efficiency amongst many other benefits that will be provided to the retail outlet because of the use of the RFID technology.…”