volume | PIER Journals

Abstract

In this article, a low-profile high gain stack microstrip antenna (MSA) with low Cross Polarization Level (CPL) using multiple metasurfaces is proposed. MSA on a thick substrate having low dielectric constant enhances the gain and bandwidth (BW). However, as substrate thickness increases, the CPL increases due to increase in coaxial probe length used for feeding MSA. The CPL is reduced by using metasurfaces formed by an array of square metallic patches of dimensions and periodicity < 0.1λ₀. A suspended MSA (SMSA) is designed on a reactive impedance surface (RIS) backed substrate, to reduce the interaction between substrate and ground plane, surface waves and to increase impedance BW and polarization purity. A parasitic patch is fabricated on a superstrate and placed above the SMSA and metallic patches forming the metasurfaces are fabricated around the MSA, PP and on the other side of superstrate. These metasurfaces increase the inductance of the antenna, and to compensate the inductance, the height of SMSA and the spacing between MSA and PP are decreased which results in the decrease in probe feed length and CPL. This novel low-profile high gain wide band stack MSA offers CPL < -20 dB, Side Lobe Level (SLL) < -20 dB, Front to Back lobe ratio (F/B) > 20 dB and S₁₁ ≤ -10 dB over 3.3-3.6 GHz to cover 5G applications. The 0.935λ₀ × 0.99λ₀ × 0.046λ₀ prototype antenna offers peak gain of 8.3 dBi, antenna efficiency >90%, and λ₀ being the free-space wavelength at 3.3 GHz.

1. Kumar, Girish and Kamala Prasan Ray, Broadband Microstrip Antennas, Artech House, Norwood, MA, 2002.

2. Meng, Fanji, Ying Liu, and Satish K. Sharma, "A miniaturized patch antenna with enhanced bandwidth by using reactive impedance surface ground and coplanar parasitic patches," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 7, e22225, 2020.

3. Guthi, Srinivas and Vakula Damera, "High gain and wideband circularly polarized S-shaped patch antenna with reactive impedance surface and frequency-selective surface configuration for Wi-Fi and Wi-Max applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 11, e22865, 2021.

4. Guthi, Srinivas and Vakula Damera, "High gain and wide band antenna based on FSS and RIS configuration," Radioengineering, Vol. 30, No. 1, 96-103, 2021.
doi:10.13164/re.2021.0096

5. Deng, Feiyang and Jiaran Qi, "Shrinking profile of Fabry-Perot cavity antennas with stratified metasurfaces: Accurate equivalent circuit design and broadband high-gain performance," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 1, 208-212, 2020.

6. Chaskar, Nayana, Shishir D. Jagtap, Rajashree Thakare, and Rajiv K. Gupta, "Gain bandwidth enhancement of microstrip antenna fed half wavelength Fabry Perot cavity antenna," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 7, e22695, 2021.

7. Chaskar, Nayana, Shishir Digamber Jagtap, Rajashree Thakare, and Rajiv Kumar Gupta, "Gain flattening of wideband FPC antenna using elliptical and rectangular slotted AMC layers," Progress In Electromagnetics Research C, Vol. 110, 81-89, 2021.

8. Singh, Amit Kumar, Mahesh P. Abegaonkar, and Shiban K. Koul, "Wide gain enhanced band high gain Fabry-Perot cavity antenna using ultrathin reflecting metasurface," Microwave and Optical Technology Letters, Vol. 61, No. 6, 1628-1633, 2019.

9. Singh, Amit K., Mahesh P. Abegaonkar, and Shiban K. Koul, "High-gain and high-aperture-efficiency cavity resonator antenna using metamaterial superstrate," IEEE Antennas and Wireless Propagation Letters, Vol. 16, No. 6, 2388-2391, 2017.

10. Jagtap, Shishir, Anjali Chaudhari, Nayana Chaskar, Shilpa Kharche, and Rajiv K. Gupta, "A wideband microstrip array design using RIS and PRS layers," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 3, 509-512, 2018.

11. Rochkari, Anjali, Shubhangi Verulkar, Mahadu Trimukhe, Varsha Bodade, and Rajiv Gupta, "Low profile high gain wideband stacked MSA array for 5G, WLAN and C-band applications," International Journal of Microwave & Optical Technology, Vol. 19, No. 1, 1-9, 2024.

12. Singh, Amit Kumar, Mahesh P. Abegaonkar, and Shiban K. Koul, "Compact near zero index metasurface lens with high aperture efficiency for antenna radiation characteristic enhancement," IET Microwaves, Antennas & Propagation, Vol. 13, No. 8, 1248-1254, 2019.

13. Zheng, Qi, Chenjiang Guo, Jun Ding, and Guy A. E. Vandenbosch, "Use of non‐uniform RIS and parasitic strips to improve antenna CP performance," IET Microwaves, Antennas & Propagation, Vol. 14, No. 14, 1795-1802, 2020.

14. Chopra, Rinkee and Girish Kumar, "Broadband and high gain multilayer multiresonator elliptical microstrip antenna," IET Microwaves, Antennas & Propagation, Vol. 14, No. 8, 821-829, 2020.

15. Raha, Krishnendu and K. P. Ray, "Broadband high gain and low cross-polarization double cavity-backed stacked microstrip antenna," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 7, 5902-5906, 2022.

16. Chopra, Rinkee and Girish Kumar, "High gain broadband stacked triangular microstrip antennas," Microwave and Optical Technology Letters, Vol. 62, No. 9, 2881-2888, 2020.

17. Srivastava, Kunal, Sachin Kumar, Santanu Dwari, Binod Kumar Kanaujia, Hyun Chul Choi, and Kang Wook Kim, "Anisotropic meta-surface-based wideband high gain circularly polarized patch antenna," Electromagnetics, Vol. 40, No. 8, 594-604, 2020.

18. Chaskar, Nayana, Sneha Dalvi, Sandip Rathod, Anjali A. Chaudhari, and Rajiv K. Gupta, "Effect of dimension, spacing, periodicity and shape of RIS on resonant frequency and bandwidth of 2 × 2 antenna array," 2016 Progress In Electromagnetic Research Symposium (PIERS), 4132-4136, Shanghai, China, Aug. 2016.

Dr. Anjali Rochkari

Dr. Shubhangi Mangesh Verulkar

Ms. Nayana Chaskar

Mr. Mahadu Annarao Trimukhe

Prof. Rajiv Kumar Gupta