Performance Assessment of a Star Patch Antenna based on RSSI Level in Actual Indoor Environments

Seman, Fauziahanim Che; Po'ad, Farhana Ahmad; Ramadhan, Faisal; Yuwono, Rudy; Abidin, Zainal; Shah, Shaharil Mohd

doi:10.1109/rfm.2018.8846498

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are two main different ways to evaluate tag performance; the first is the received signal strength indication (RSSI), which can be obtained through actual testing or calculation, [16][17][18][19] and the second is reflection loss S11, which is also the basis for evaluating antenna performance, 20,21 where S11 ¼ 20 log(À), À ¼ input power output power ð . Here, C indicates the transmission efficiency of the antenna.…”

Section: Characteristic Parametermentioning

confidence: 99%

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

Zhang

Xiong

et al. 2020

Textile Research Journal

View full text Add to dashboard Cite

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.

show abstract