Analysis and Design of Meander Line Dipole Antennas

2012 ◽  
pp. 10-28
Author(s):  
Zhonghao Hu ◽  
Peter H. Cole ◽  
Christophe Fumeaux ◽  
Yuexian Wang
Keyword(s):  
Resonant Frequency ◽  
Free Space ◽  
Dielectric Material ◽  
Effective Permittivity ◽  
Matching Condition ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Rfid Tag ◽  
Two Factors ◽  
Meander Line

A simple analytic formula, found in the literature for calculating the resonant frequency of a meander line dipole antenna (MDA) in free space from its physical parameters is described. The formula is modified to calculate the resonant frequency of an MDA on a dielectric substrate and for use as an RFID tag antenna by taking two factors into account: (i) the effects of dielectric material underneath the MDA, (ii) the special needs of an impedance matching condition in RFID tag antenna design. The parameter of relative effective permittivity for an MDA on a dielectric board, and the method for deriving this parameter, are introduced. Experiments to verify the modified formula are reported. Test results such as input impedance and reading range of an RFID tag antenna design based on an MDA on a dielectric board are provided. Following that, the radiation pattern and efficiency of an MDA either in free space or on a board are investigated.

A Novel RFID Tag Dipole Antenna

2014 ◽  
Vol 513-517 ◽  
pp. 2808-2811
Author(s):  
Ming Lu He ◽  
Yan Bing Xue ◽  
Jing Zhang
Keyword(s):  
Return Loss ◽  
High Efficiency ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Rfid Tag ◽  
Maximum Gain ◽  
Meander Line ◽  
Read Range

There is a problem in normal meander line antenna (MLA) that it is difficult to get performances of miniaturization, high efficiency and high inductance at the same time. A simple novel antenna design for this challenge is described. Two capacitive loads are added at the end of MLA to adjust the impendence. For saving material, holes are digged on the loads. Simulation by HFSS shows that, comparing with the regular MLA, the proposed antennas impedance enhances from 10-12j to 23+150j, and the maximum gain enhances from 1.31dB to 1.67dB, with a read range of 10.1m. Meanwhile the return loss at 915MHz is-34dB, with a wide-10dB bandwidth of 860 ~ 985 MHz.

Structure optimization of an ultrahigh frequency radio frequency identification tag thread based on the normal mode helix dipole antenna

2020 ◽  
pp. 004051752094890
Author(s):  
Yong Zhang ◽  
Jiyong Hu ◽  
Xiong Yan ◽  
Xudong Yang
Keyword(s):  
Resonant Frequency ◽  
Normal Mode ◽  
Radio Frequency Identification ◽  
Dipole Antenna ◽  
Uhf Rfid ◽  
Simulation Experiments ◽  
Rfid Tag ◽  
Helical Pitch ◽  
Frequency Identification ◽  
Linear Dipole

This paper describes the design of a novel ultrahigh frequency radio frequency identification (UHF RFID) tag thread that mainly consisted of the common yarn and the normal mode helix dipole antenna. The linear dipole antenna for the UHF RFID tag thread was too long to miniaturize the tag. In order to maximize the read performance and miniaturize the size of the tag, the basic antenna structure parameters, such as the helical pitch and single arm length, were optimized by analyzing the radiation parameter S11 of the normal mode helix dipole antenna based on simulation experiments. The simulation experiments started with optimizing the single arm length to obtain the minimum of the S11 parameter at resonant frequency, then the helical pitch was further optimized to limit the resonant frequency to the UHF range. The simulation results showed the resonant frequency rises with an increase of helical pitch and declines with an increase of single arm length. Furthermore, a series of UHF RFID tag threads with good performance from the simulation cases were prepared, and the performance of the optimized tag was validated. Generally, the UHF RFID tag thread with optimized helix dipole antenna could reduce the axial length of the tag by 57% and improve the reading range by 500%, and its performance was greatly superior to that of the UHF RFID tag thread with the classical linear dipole antenna.

Design and Analysis of UHF RFID Tag Antenna on the Surface of Cylinder

2014 ◽  
Vol 541-542 ◽  
pp. 458-461
Author(s):  
Pu Yu Duan ◽  
Dong Wang
Keyword(s):  
Plane Surface ◽  
Impedance Matching ◽  
Dipole Antenna ◽  
Cylinder Surface ◽  
Uhf Rfid ◽  
Logistics Industry ◽  
Rfid Tag ◽  
The Impact ◽  
Meander Line ◽  
Read Range

Cylinder is a common object and used in logistics industry, such as liquid container like wine. The performance of tags that are used on these objects declines, especially the read range and the radiation pattern of the tag. In this paper, a type of UHF tag antenna directly mountable on the cylinder surface. In order to reduce the impact of the deformation, the tag is designed with meander-line but not symmetrical. Antenna is combined with T-matching network to ensure good impedance matching. Compared with the basic dipole antenna tag both cylinder and plane surface, we can get the prominent feature of the tag proposed in this paper.

scholarly journals Enhanced Dipole Antenna for RFID by Using Metamaterials

2021 ◽  
Vol 8 (2) ◽  
pp. 47-50
Author(s):  
Nail Alaoui ◽  
Aicha Djalab ◽  
Lakhdar Bouhamla ◽  
Abdellah Azouze ◽  
Rania Ibtissam Benmelouka ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Resonant Frequency ◽  
Radiation Pattern ◽  
Return Loss ◽  
Dipole Antenna ◽  
Frequency Characteristics ◽  
Antenna Design ◽  
Antenna Size ◽  
Novel Method ◽  
Simulation Results

The paper at hand discusses a novel method of miniaturization of antenna design using metamaterials. We suggest a novel method to improve frequency characteristics while reducing antenna size. This method is based on the connection of this element resonant two split rings resonator. The resonant frequency, return loss, bandwidth, radiation pattern, gain, directivity, electromagnetic field, and current supplied by the proposed antenna are the parameters addressed in this study. CST software generates all simulation results.

scholarly journals Gain Enhancement of Small Antenna Using Meander Line Concept

2018 ◽  
Vol 7 (2.20) ◽  
pp. 193
Author(s):  
M Venkata Narayana ◽  
Govardhani. Immadi ◽  
Habibulla Khan ◽  
Y Meena Kumari
Keyword(s):  
Resonant Frequency ◽  
Ground Plane ◽  
Antenna Design ◽  
Efficiency Gain ◽  
Electrically Small Antennas ◽  
Gain Enhancement ◽  
Small Antennas ◽  
Small Antenna ◽  
Meander Line ◽  
Available Volume

In view with the latest technologies, compact device sizes had become a greater focus in industry because of which the demand for small antenna escalates. But electrically small antennas have high quality factor because of which the gain decreases. Therefore, an antenna was designed to improve the gain using the meander line concept based on the ground plane effect. A finite ground plane affects the resonant frequency and as the ground plane size increases, the resonant frequency decreases. By using a truncated ground plane, the antenna efficiency, gain and radiation pattern are improved. The antenna design had been modified based on another important concept of efficiently occupying the available volume. The antenna was designed on a cubic configuration and by using the two general techniques of modifying the geometry and truncating the ground plane, the gain of the antenna had been improved from 7.05dB to 8.03dB. 

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