volume | PIER Journals

Abstract

This paper presents a novel reconfigurable filtering antenna with three tunable states used for IoT applications. The frequency reconfigurability is achieved using the combination of a hairpin filter and an open loop filter in the structure with the switching of p-i-n diodes. The open-loop filter structure provides two narrow band states at 2.4 GHz and 7.8 GHz, and the hairpin filter provides a single narrow band state at 10.4 GHz. The frequency reconfiguration is obtained without compromising the compact size of the designed circuit along with the targeted frequency bands at lower WLAN (2.47 GHz), WiMAX (3.42 GHz), INSAT C-band (7.18 GHz), fixed/mobile satellite service in X-band (8.4 GHz), direct broadcast service in Ku-band (12.14 GHz) applications. The prototype is constructed on an FR4 substrate and tested for validation in an anechoic chamber. The designed antenna provides excellent radiation characteristics and considerable gain at resonant frequencies. The proposed reconfigurable antenna is also tested using the CDAC Cmote device in the real-time environment and found more suitable for the IoT based communication applications.

1. Cheung, C. Y., J. S. Yuen, and S. W. Mung, "Miniaturized printed inverted-F antenna for internet of things: A design on PCB with a meandering line and shorting strip," International Journal of Antennas and Propagation, Vol. 2018, Article ID 5172960, 5 pages, 2018.

2. Awais, Q., H. T. Chattha, M. Jamil, Y. Jin, F. A. Tahir, and M. U. Rehman, "A novel dual ultrawideband CPW-fed printed antenna for Internet of Things (IoT) applications," Wireless Communications and Mobile Computing, 1-9, https://doi.org/10.1155/2018/2179571, 2018.
doi:10.1155/2018/2179571

3. Bashir, U., K. R. Jha, G. Mishra, G. Singh, and S. K. Sharma, "Octahedron-shaped linearly polarized antenna for multi standar services including RFID and IOT," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 7, 3364-3373, 2017.
doi:10.1109/TAP.2017.2705097

4. Sun, C., H. Zheng, L. Zhang, and Y. Liu, "A compact frequency-reconfigurable patch antenna for beidou (compass) navigation system," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 967-970, 2014.

5. Li, T., H. Zhai, X. Wang, L. Li, and C. Liang, "Frequency-reconfigurable bow-tie antenna for bluetooth, WiMAX, and WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 171-174, 2015.
doi:10.1109/LAWP.2014.2359199

6. Qin, P.-Y., F. Wei, and Y. J. Guo, "A wideband-to-narrowband tunable antenna using a reconfigurable filter," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 5, 2282-2285, 2015.
doi:10.1109/TAP.2015.2402295

7. Rhee, C. Y., J. H. Kim, W. J. Jung, T. Park, B. Lee, and C. W. Jung, "Frequency-reconfigurable antenna for broadband airborne applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 189-192, 2014.
doi:10.1109/LAWP.2014.2301036

8. Majid, H. A., M. K. A. Rahim, M. R. Hamid, and M. F. Ismail, "Frequency and pattern reconfigurable slot antenna," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 10, 5339-5343, 2014.
doi:10.1109/TAP.2014.2342237

9. Cai, Y.-M., K. Li, Y. Yin, S. Gao, W. Hu, and L. Zhao, "A low-profile frequency reconfigurable grid-slotted patch antenna," IEEE Access, Vol. 6, 36305-36312, 2018.
doi:10.1109/ACCESS.2018.2850926

10. Majid, H. A., M. K. A. Rahim, M. R. Hamid, and M. Ismail, "A compact frequency-reconfigurable narrowband microstrip slot antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 616-619, 2012.
doi:10.1109/LAWP.2012.2202869

11. Han, T.-Y., Y.-J. Liao, et al. "A frequency reconfigurable half annular ring slot antenna design," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 6, 3428-3431, 2014.
doi:10.1109/TAP.2014.2314314

12. Yang, S. L. S., A. A. Kishk, and K. F. Lee, "Frequency reconfigurable U-slot microstrip patch antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 127-129, 2008.
doi:10.1109/LAWP.2008.921330

13. Li, H.-Y., C.-T. Yeh, J.-J. Huang, C.-W. Chang, C.-T. Yu, and J.-S. Fu, "CPW-fed frequency reconfigurable slot-loop antenna with a tunable matching network based on ferroelectric varactors," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 614-617, 2015.
doi:10.1109/LAWP.2014.2375334

14. Simorangkir, R. B., Y. Yang, K. P. Esselle, and B. A. Zeb, "A method to realize robust flexible electronically tunable antennas using polymer-embedded conductive fabric," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 1, 50-58, 2018.
doi:10.1109/TAP.2017.2772036

15. Cheung, S., Y. Cao, and T. Yuk, "Compact frequency reconfigurable slot antenna with continuous tuning range for cognitive radios," 2015 9th European Conference on Antennas and Propagation (EuCAP), 1-4, IEEE, 2015.

16. Costa, F., A. Monorchio, S. Talarico, and F. M. Valeri, "An active high-impedance surface for low-profile tunable and steerable antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 676-680, 2008.
doi:10.1109/LAWP.2008.2006070

17. Liang, B., B. Sanz-Izquierdo, E. A. Parker, and J. C. Batchelor, "A frequency and polarization reconfigurable circularly polarized antenna using active ebg structure for satellite navigation," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 1, 33-40, 2015.
doi:10.1109/TAP.2014.2367537

18. Sam, W. and Z. Zakaria, "The investigation of the varactor diode as tuning element on reconfigurable antenna," 2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP), 13-14, IEEE, 2016.
doi:10.1109/APCAP.2016.7843076

19. Ge, L., M. Li, J. Wang, and H. Gu, "Unidirectional dual-band stacked patch antenna with independent frequency reconfiguration," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 113-116, 2017.
doi:10.1109/LAWP.2016.2558658

20. Liu, W., Z. N. Chen, and X. Qing, "Metamaterial-based low-profile broad-band mushroom antenna," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 3, 1165-1172, 2014.
doi:10.1109/TAP.2013.2293788

21. Bahl, I. J. and P. Bhartia, Microstrip Antennas, Artech House, 1980.

22. Hong, J.-S. G. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Vol. 167, John Wiley & Sons, 2004.

23. Isernia, T. and A. F. Morabito, "Mask-constrained power synthesis of linear arrays with even excitations," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 7, 3212-3217, 2016.
doi:10.1109/TAP.2016.2556712

Dr. Vamsee Krishna Allam

Professor Boddapati Taraka Phani Madhav

Dr. Tirunagari Anilkumar

Dr. Suman Maloji