Design and Optimization of Coplanar Waveguide-Fed Sensing Antennas for ISM Band Applications

Authors: Vivek Bharti, Inderpreet Kaur, Saurabh Verma, Renu Gangwar, Hari Kumar Singh

Abstract:

This work presents a dual-band Coplanar Waveguide (CPW) fed rectangular patch antenna designed for applications in Industrial, Scientific, and Medical (ISM) Band sensing. Fabricated on a cost-effective FR-4 substrate with specific dimensions, the antenna incorporates a rectangular slot and a copper patch, optimized through simulation to achieve desired characteristics, particularly focusing on the reflection coefficient. A unique feature is introduced through the integration of copper cells forming a Partially Reflecting Surface (PRS) to feed the antenna. Dual-band functionality is achieved, covering frequencies of 1.28 GHz-1.3 GHz and 4.9 GHz-5.2 GHz, catering to diverse communication needs within these frequency ranges. The addition of a superstrate enhances the antenna’s gain, resulting in 4.5 dBi at 1.28 GHz-1.3 GHz and 6.5 dBi at 4.9 GHz-5.2 GHz, with an efficiency of 58%.

Keywords: ISM, Coplanar waveguide fed, superstrate, circularly polarized.

References:

[1] Liu, A. Parks, V. Talla, S. Gollakota, D. Wetherall, and J. R. Smith, “Ambient backscatter: Wireless communication out of thin air,” ACM SIGCOMM Computer Communication Review, vol. 43, pp., 39–50, Aug. 2013.
[2] X. Bao, K. Yang, O. O’Conchubhair, and M. J. Ammann, “Differentially-fed omnidirectional circularly polarized patch antenna for RF energy harvesting,” in 2016 10th European Conference on Antennas and Propagation (EuCAP), pp. 1–5, Apr. 2016.
[3] S. Muhammad, J. J. Tiang, S. K. Wong, A. Smida, R. Ghayoula, and A. Iqbal, “A dual-band ambient energy harvesting rectenna design for wireless power communications,” IEEE Access, vol. 9, pp. 99944– 99953, Jul. 2021.
[4] K.-L. Wong, Compact and broadband microstrip antennas, vol. 168. John Wiley & Sons, Apr. 2004.
[5] C. Chou, K. Lin, and H. Su, “Broadband circularly polarised cross patchloaded square slot antenna,” Electronics Letters, vol. 43, pp. 485–486, Apr. 2007.
[6] J.-Y. Sze, K.-L. Wong, and C.-C. Huang, “Coplanar waveguide-fed square slot antenna for broadband circularly polarized radiation,” IEEE Transactions on Antennas and Propagation, vol. 51, pp. 2141–2144, Aug. 2003.
[7] Y.-Y. Chen, Y.-C. Jiao, G. Zhao, W. Zhang, and H.-H. Xie, “A novel compact slot antenna for broadband circularly polarized radiation,” in Proceedings of the 9th International Symposium on Antennas, Propagation and EM Theory, pp. 201–204, Dec. 2010.
[8] P. M. Paul, K. Kandasamy, and M. S. Sharawi, “A corner expanded CPW-fed slot antenna with circular polarization characteristics,” in 2019 13th European Conference on Antennas and Propagation (EuCAP), pp. 1–3, Jun. 2019.
[9] Y. Liu and P. Hsu, “Broadband circularly polarised square slot antenna fed by coplanar waveguide,” Electronics letters, vol. 49, pp. 976–977, Aug. 2013.
[10] J.-Y. Sze and C.-C. Chang, “Circularly polarized square slot antenna with a pair of inverted-L grounded strips,” IEEE Antennas and Wireless Propagation Letters, vol. 7, pp. 149–151, Mar. 2008.
[11] R. Orr, G. Goussetis, and V. Fusco, “Design method for circularly polarized Fabry-P´erot cavity antennas,” IEEE Transactions on Antennas and Propagation, vol. 62, no. 1, pp. 19–26, 2013.