Design of a Novel Dual-Loop Gate Antenna for Radio Frequency Identification (Rfid) Systems at Low Frequency Band

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thai

Torrungrueng

2011

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In this paper, the multiple sweep method of moments (MSMM) with the spectral acceleration (SA) algorithm and the genetic algorithm (GA) is proposed to design non-uniform spacing collinear dipole antenna arrays in free space. The SA algorithm is employed to accelerate the MSMM to be O(N), and the GA is incorporated to find optimum array parameters, where N is the total number of unknowns. Under this appropriate combination, numerical results are presented to demonstrate the accuracy and efficiency of the MSMM/SA/GA method for electrically large non uniform spacing collinear dipole antenna arrays in free space. It is found that the MSMM/SA/GA method provides more accurate radiation pattern than the pattern multiplication method. Moreover, the computational time and the memory storage requirement tend to be O(N) with the array increment in one direction.

Section: Msmm/sa/ga Antenna Array Design Proceduresmentioning

confidence: 99%

The MSMM/SA/GA design of non-uniform spacing collinear dipole antenna arrays

Kawdungta

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thai

Torrungrueng

2011

Self Cite

“…The design procedure starts with the initial array parameters, and computes the current distribution on each section ( , adjusted by the GA until the optimum parameters are determined to achieve a desired goal. In this paper, the simple GA is used, which consists of the roulette-wheel selection, cross over operator and mutation operator [11]. In the next section, numerical results are presented to demonstrate the accuracy and efficiency of the MSMM/GA antenna design procedure.…”

Section: Msmm/ga Antenna Design Proceduresmentioning

confidence: 99%

The MSMM/GA design of non-uniform spacing collinear dipole antenna arrays

Kawdungta

2011 IEEE International Symposium on Antennas and Propagation (APSURSI)

Torrungrueng

2011

Self Cite

In this paper, the use of the multiple sweep method of moments (MSMM) is proposed to design collinear dipole antenna arrays in free space. The genetic algorithm (GA) is cooperated to find the optimum array parameters. The antenna design is focused on non-uniform spacing collinear dipole antenna arrays. Under this appropriate combination (MSMM/GA), numerical results are presented to demonstrate its accuracy and efficiency for non-uniform spacing collinear dipole antenna arrays in free space. It is found that the MSMM/GA method provides more accurate radiation patterns than the pattern multiplication method, especially at side lobes.

“…Figure illustrates the experimental setup in measurement of the near‐field tag readability performances of the three antenna structures (i.e., the rectangular loop, the multi‐segment loop, and the integrated antenna). Table compares the percentage of readability of three experimental antenna structures at the various distances.…”

Section: Readability Performancementioning

confidence: 99%

The multiple loop antenna for enhanced readability performances of near-field UHFRFID applications

Pansomboon

Int J RF and Microwave Comp Aid Eng

2016

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This research is concerned with a multiple loop antenna applicable to near field ultra-high frequency (UHF) radio frequency identification (RFID). The proposed multi-loop antenna is configured to induce the robust and even magnetic field distributions in the H x , H y , and H z orientations so as to achieve the enhanced readability performances in all directions (i.e., x, y, and z). Simulations were carried out using CST Microwave Studio to determine the impedance bandwidth (|S 11 |<210 dB) in the frequency range of 920-925 MHz (i.e., Thailand's UHF RFID standard) and to investigate the H x -, H y -, and H z -oriented magnetic field distributions. A prototype antenna of 14 cm 3 16 cm 3 0.6 mm (W 3 L 3 H) in overall dimension was subsequently fabricated on an FR4 substrate connected to a coaxial cable. In this research, the H x -, H y -, and H z -oriented magnetic field distributions of the prototype antenna were measured in the x-axis, y-axis, and x-y plane and are in good agreement with the simulation results. The measured readability performances in the x-, y-, and z-directions in which seven near field UHF RFID tags were deployed unobstructed (i.e., in open air) are respectively 25.27%, 31.73%, and 85.43%. Furthermore, the performances on the antenna readability with the tags attached to the microcentrifuge tubes are 30.55%, 25.90%, and 69.09% for the x-, y-, and z-directions. V C 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:402-417, 2016.