Hexagonal ring microstrip patch antennas for PCS and S-band radar applications

Abstract

In this study, two hexagonal ring microstrip patch antennas for Personal Communication Service (PCS/1850-1990 MHz) and S-band (2000-4000 MHz) radar applications are proposed and simulation results for antenna performance parameters are presented. The antennas consist of a hexagonal ring patch, a ground plane and a dielectric substrate in between. Edge length of each square antenna is 25 mm. Substrate height is 4.3 mm. Relative permittivity and loss tangent of the substrate material are 15.5 and 0.0001, respectively. Distance from center of the antennas to inner and outer hexagon corners are 4 mm and 10.19 mm, respectively. The antennas are fed by a 50-ohm coaxial probe. Depending on the feed location, resonant frequency and therefore application choice is achieved. Center of the antennas is denoted as (0, 0) mm. For the feed location of (-1.50, -4.19) mm, the antenna for PCS application resonates between 1830-2035 MHz with a bandwidth of 205 MHz. Voltage Standing Wave Ratio (VSWR) value at 1900 MHz is 1.1097. Unidirectional radiation patterns are obtained for both Ø=0ᴼ and Ø=90ᴼ planes. Maximum radiations occur at boresight with radiation levels of 12.09 dB and 12.10 dB for Ø=0ᴼ and Ø=90ᴼ planes, respectively. Maximum gain is 3.26 dBi for Ø=0ᴼ plane and 3.09 dBi for Ø=90ᴼ plane. For the feed location of (-7.36, 0.95) mm, the antenna for S-band application resonates between 3280-4015 MHz covering S-band with a bandwidth of 735 MHz. The frequency range and bandwidth are suitable for the radar application. VSWR value at the resonant frequency of 3650 MHz is 1.0164. Again, unidirectional radiation patterns are obtained for both Ø=0ᴼ and Ø=90ᴼ planes. Maximum radiations occur at boresight with radiation levels of 5.82 dB and 5.75 dB for Ø=0ᴼ and Ø=90ᴼ planes, respectively. Maximum gain is 4.14 dBi for Ø=0ᴼ plane and 4.03 dBi for Ø=90ᴼ plane.

Keywords

• antenna parameters
• hexagonal ring
• microstrip patch antenna
• personal communication service
• S-band radar

References

1. M. Kumar and V. Nath, “Introducing multiband and wideband microstrip patch antennas using fractal geometries: development in last decade,” Wireless Pers. Commun., vol. 98, pp. 2079-2105, 2018. DOI: https://doi.org/10.1007/s11277-017-4965-x
2. S. Feng, L. Zhang, Z. B. Weng and Y. C. Jiao, “A compact broadband differential-fed microstrip patch antenna with 5.8 GHz WLAN band-notched under quad-mode resonance,” Microw. Opt. Technol. Lett., pp. 1-8, 2019. DOI: https://doi.org/10.1002/mop.32222
3. B. Babakhani and S. K. Sharma, “Dual null steering and limited beam peak steering using triple-mode circular microstrip patch antenna,” IEEE Transactions on Antennas and Propagation, vol. 65, pp. 3838-3848, 2017. DOI: 10.1109/TAP2017.2710198
4. N. W. Liu, S. Gao, L. Zhu, L. Y. Ji, et. al. , “Low-profile microstrip patch antenna with simultaneous enhanced bandwidth, beamwidth, and cross-polarisation under dual resonance,” IET Microwaves, Antennas & Propagation, vol. 14, pp. 360-365, 2020. DOI: 10.1049/iet-map.2019.0565
5. K. Celik and E. Kurt, “A novel super wideband circular fractal antenna for energy harvesting applications,” In Proc. 6th European Conference on Renewable Energy Systems (ECRES), 2019, pp. 1-4. DOI: 10.1109/ISAECT47714.2019.9069672
6. R. K. Maurya, B. K. Kanaujia, A. K. Gautam, S. Chatterji, et. al., “Circularly polarized hexagonal ring microstrip patch antenna with asymmetrical feed and DGS,” Microw. Opt. Technol. Lett., pp. 1-7, 2019. DOI: https://doi.org/10.1002/mop.32220
7. Z. Wang, J. Liu and Y. Long, “A simple wide-bandwidth and high-gain microstrip patch antenna with both sides shorted,” IEEE Antennas and Wireless Propagation Letters, vol. 18, pp. 1144-1148, 2019. DOI: 10.11097/LAWP.2019.2911045
8. M. F. Farooqui and A. Kishk, “3-D-printed tunable circularly polarized microstrip patch antenna,” IEEE Antennas and Wireless Propagation Letters, vol. 18, pp. 1429-1432, 2019. DOI: 10.11097/LAWP.2019.2919255

9. S. Feng, H. W. Yu, Y. X. Zhang and Y. C. Jiao, “A single-layer wideband differential-fed microstrip patch antenna with complementary split-ring resonators loaded,” IEEE Access, vol. 7, pp. 132041-132048, 2019. DOI: 10.1109/ACCESS.2019.2940279
10. J. Wen, D. Xie and L. Zhu, “Bandwidth-enhanced high-gain microstrip patch antenna under TM30 and TM50 dual-mode resonances,” IEEE Antennas and Wireless Propagation Letters, vol. 18, pp. 1976-1980, 2019. DOI: 10.1109/LAWP.2019.2935679
11. J. D. Ntawangaheza, L. Sun, C. Yang, Y. Pang, et. al., “Thin-profile wideband and high-gain microstrip patch antenna on a modified AMC,” IEEE Antennas and Wireless Propagation Letters, vol. 18, pp. 2518-2522, 2019. DOI: 10.1109/LAWP.2019.2942056
12. R. Dhara and M. Mitra, “A triple-band circularly polarized annular ring antenna with asymmetric ground plane for wireless applications,” Engineering Reports, vol. 2, pp. 1-17, 2020. DOI: https://doi.org/10.1002/eng2.12150
13. N. Rezazadeh and L. Shafai, “A compact microstrip patch antenna for civilian GPS interference mitigation,” IEEE Antennas and Wireless Propagation Letters, vol. 17, pp. 381-384, 2018. DOI: 10.1109/LAWP.2018.2790958
14. R. Varma, J. Ghosh and R. Bhattacharya, “A compact dual frequency double U-slot rectangular microstrip patch antenna for WiFi/WiMAX,” Microw. Opt. Technol. Lett., vol. 59, pp. 2174-2179, 2017. DOI: https://doi.org/10.1002/mop.30705
15. Y. S. Wu and F. J. Rosenbaum, “Mode chart for microstrip ring resonators,” IEEE Transactions on Microwave Theory and Techniques, pp. 487-489, 1973. DOI: 10.1109/TMTT.1973.1128039