Suwalak, Rattapong
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Preferred name
Suwalak, Rattapong
Alternative Name
Suwalak, R.
Main Affiliation
Email
rattapong.su@kmitl.ac.th
6 results
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Item type:Publication, A compact loop antenna with parasitic split ring for UHF RFID application(2013-05-27); This paper presents a compact loop antenna with parasitic split ring for the reader of the UHF RFID application. The proposed antenna is made up of the rectangular loop structure (feeding element) and the parasitic split ring to reduce the overall antenna dimension. It is found that the size can be decreased by 50% of the typical single loop antenna. The simulation is carried out by using CST Microwave Studio program based on the Finite Integral Technique (FIT). Furthermore, the antenna parameters are optimized using the Quasi Newton method. The effect of the antenna parameters on the impedance bandwidth are investigated in this paper. The comparison between the simulation and experimental results are also discussed. From the results, the antenna has the S<inf>11</inf> less than -10 dB along the bandwidth of 12MHz (1.6%). It can be operated in UHF RFID system in Thailand with the frequency band from 920MHz to 925 MHz. The omnidirectional beam is obtained with the maximum gain of 1.5 dBi at the center frequency of 922.5 MHz. The antenna is designed on FR4-substrate. The overall size of the proposed antenna is 51mm x 38mm x 0.8mm (0.15λx 0.11λx 0.02̧). It is easily embedded inside handheld reader. Moreover, the proposed antenna is simple structure, low profile and easy fabrication. Therefore, the compact loop antenna with parasitic split ring can be employed with a handheld UHF RFID reader. Copyright © 2013 The Electromagnetics Academy. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dual-Band Band-Stop Filter using Multiple Hexagonal Microstrip Line for Chipless RFID Sensor(2023-01-01); ; Torrungrueng, DanaiThe dual-band band-stop filter using a hexagonal-shape microstrip line is presented in this paper. The chipless RFID with the band-stop filter used to determine the relative permittivity of material under test and identify characteristic based on the unique responded signal from the chipless RFID sensor. This paper proposed the multiple microstrip line structure with a quarter-wavelength transformer to generate an identification (ID) code, i.e., ID-01, ID-10, and ID-11 at the center frequency of 2.2 GHz and 2.7 GHz. From the results, the proposed chipless RFID sensor can be identified and determined the relative permittivity of the LWC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Compact Label-Typed L-Shaped Slot UHF RFID Tag Antenna Mountable on Metallic Cans(2022-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of tag location on light weight concrete for an RFID sensor application(2012-10-02); ; ; Torrungrueng, DanaiThe radio frequency identification (RFID) tags are proposed to be employed as remotely read dielectric-property sensors to determine qualities of some construction material products (CMPs); e.g., light weight concrete (LWC), mortar specimens and concrete. This paper presents a study of the characteristics of an RFID tag mounted at several locations on the LWC. The numerical simulations are performed using the CST Microwave Studio to study effects of tag, where the folded dipole with an inductive loop tag antenna is used. Results show that locations of an RFID tag on LWC affects the tag antenna characteristics such as input impedance, gain and radiation pattern. © 2012 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Recent Advances in RFID Sensors for Construction Material Monitoring Applications (Invited Paper)(2018-07-02); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dual-band chipless RFID sensor for a material quality monitoring application(2017-01-17); ; Torrungrueng, DanaiThe dual-band chipless RFID sensor is proposed to employ as a wireless material quality monitoring application. A printed perpendicular rectangular loop tag and a printed concentric rectangular loop tag are designed and optimized using the CST Microwave Studio program. The chipless RFID sensors are located on a material surface to determine qualities of a material under test. From numerical results, it is found that the proposed dual-band chipless RFID-sensor has a significant different radar cross section (RCS) compared with the single-band one. Therefore, both RFID sensors can be used together in the material quality monitoring system to improve the accuracy.