In this research work a compact patch antenna which is reconfigurable for frequency is presented. Frequency reconfigurability is achieved by the use of two PIN diodes. Antenna operates over four frequencies, i.e., for WiMax (4.94 GHz), WLAN (5.35), and C-Band (6.25 and 6.83 GHz) applications. The overall dimension of antenna is 25×25 mm2, and an FR-4 substrate having dielectric constant of 4.4 and thickness 1.6 mm is used to fabricate the prototype of the proposed antenna. Different resonant frequencies are obtained by cutting a ∏-slot and a U-slot in radiating patch and by modifying ground slot with a modified slotted structure. One diode is used in ground, and another PIN diode is used on the patch at an appropriate position. Maximum gain of 3.91 dBi and stable radiation characteristics and VSWR < 2 are obtained at the operating bands in simulation and measurement. The antenna elicits its novelty through compactness, portability for communication devices through combination of only two PIN diode switching in cellphones, tablets PCs, and other satellite communication devices operating in C-band as per FCC standard. A prototype of antenna is fabricated, and the measured and simulated parameters are in good agreement.
2. Bharadwaj, S., D. Sipal, D. Yadav, and S. Koul, "A compact tri-band frequency reconfigurable antenna for LTE/Wi-Fi/ITS applications," Progress In Electromagnetics Research M, Vol. 91, 59-67, 2020.
3. Guo, G., L, Deng, J. Dong, T. Yi, C. Liao, S. Huang, and H. Luo, "Variode enabled frequency-reconfigurable microstrip patch antenna with operation band covering S and C bands," Progress In Electromagnetics Research M, Vol. 88, 159-167, 2020.
4. Chattha, H., M. Hanif, X. Yang, I. Rana, and Q. Abbasi, "Frequency reconfigurable patch antenna for 4G LTE applications," Progress In Electromagnetics Research M, Vol. 69, 1-13, 2018.
5. Jenath Sathikbasha, M. and V. Nagarajan, "Design of multiband frequency reconfigurable antenna with defected ground structure for wireless applications," Wireless Pers. Commun., 867-892, 2020, https://doi.org/10.1007/s11277-020-07256-8.
6. Ali, T., M. M. Khaleeq, and R. C. Biradar, "A multiband reconfigurable slot antenna for wireless applications," AEU — International Journal of Electronics and Communications, Vol. 84, 273-280, Feb. 2018.
7. Chandra, K., M. Satyanarayana, and K. Battula, "A novel miniature hexagonal shape switched pattern and frequency reconfigurable antenna," International Journal of Communication System, Vol. 33, No. 5, 1-8, Sept. 2019.
8. Han, L., C. Wang, X. Chen, and W. Zhang, "Compact frequency reconfigurable antenna for wireless applications," IEEE Antennas and Wireless Propagation Letters, Vol. 15, No. 1, 1795-1798, Jun. 2018.
9. Awan, W., N. Hussain, S. Naqvi, A. Iqbal, R. Striker, D. Mitra, and B. Braaten, "A miniaturized wideband and multi-band on-demand reconfigurable antenna for compact and portable devices," International Journal of Electronics and Communications, Vol. 122, Jul. 2020.
10. Bitchikh, M., W. Rili, and M. Mokhtari, "An UWB to narrow band and bi-bands reconfigurable octogonal antenna," Progress In Electromagnetics Research Letters, Vol. 74, 69-75, 2018.
11. Pandhare, R. and M. Abegaonkar, "Inset-feed frequency reconfigurable compact E-shape patch with DGS," Progress In Electromagnetics Research C, Vol. 101, 119-132, 2020.
12. Prem, P. S., P. K. Goswami, S. K. Sharma, and G. Goswami, "Frequency reconfigurable multiband antenna for IoT applications in WLAN, Wi-Max, and C-band," Progress In Electromagnetics Research C, Vol. 102, 149-162, 2020.
13. Shah, I., S. Hayat, A. Basir, M. Zada, S. Shah, and S. Ullah, "Design and analysis of a hexa-band frequency reconfigurable antenna for wireless communication," International Journal of Electronics and Communications, Vol. 98, No. 1, 80-88, Jan. 2019.
14. Choukiker, Y. K. and S. K. Behera, "Wideband frequency reconfigurable Koch snowflake fractal antenna," IET Microwaves, Antennas & Propagation, Vol. 11, No. 2, 203-208, 2017.
15. Behdad, N. and K. Sarabandi, "Dual-band reconfigurable antenna with a very wide tunability range," IEEE Transactions on Antennas and Propagation, Vol. 54, No. 2, 409-416, Feb. 2006.