Patch Antennas with T-Match, Inductively Coupled Loop and Nested-slots Layouts for Passive UHF-RFID Tags

Authors Hind Raihani1, Ali Benbassou1, Mohammed El Ghzaoui1 , 2 , Jamal Belkadid1, Sudipta Das3

1Inn. Laboratory, EST-Fez, Sidi Mohamed Ben Abdellah University, Morocco

2Sidi Mohamed Ben Abdellah University, Faculty of Sciences, Fes, Morocco

3Department of ECE, IMPS College of Engineering and Technology, W.B., India


Issue Volume 13, Year 2021, Number 3
Dates Received 15 January 2021; revised manuscript received 14 June 2021; published online 25 June 2021
Citation Hind Raihani, Ali Benbassou, Mohammed El Ghzaoui, et al., J. Nano- Electron. Phys. 13 No 3, 03033 (2021)
PACS Number(s) 84.40.Ba
Keywords RFID (2) , Antenna (6) , UHF-RFID, T-Match, Inductively couped loop, Nested slots.  .

The objective of this article is to study the performance of the RFID (Radio Frequency Identification) technology and especially the passive UHF RFID (Ultra High Frequency RFID) tags by mean of simulation. In this paper, three patch antennas with different matching techniques for passive UHF-RFID tags are proposed. T-Match, inductively coupled loop and nested-slots layouts are adopted in order to achieve complex impedance matching between the antennas impedance and the chip selected at 915 MHz with high performance. The antennas are printed on a Rogers RT/duroid 5880 substrate with a relative permittivity of 2.2 and thickness of 1.575 mm. Studies demonstrate that the inductively coupled loop and the nested-slots matching techniques are the good candidates to adapt the antenna impedance to chip impedance, while adaptation in T is intended to be only used for dipole antennas. We have achieved an adaptation of 99.90 %, a very wide bandwidth of 409.6 MHz, a broadside an asymmetrical radiation pattern in the E-plane, a read range of 21.19 m and an antenna gain of 4.17 dB with the inductively coupled loop matching technique, while with the nested-slots matching method, we have acquired an adaptation of 99.94 %, a directive antenna, a read range of 19.83 m and a gain of 3.59 dB.

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