This paper proposes a dual-beam switchable self-oscillating active integrated array antenna for Ku-band wireless power transfer systems. The oscillation is sourced by a positive feedback type Push-Push oscillator, which shows an excellent measured output power of +9.3 dBm obtained at the second harmonic frequency as well as good suppression of the undesired harmonics. The generated RF power from the oscillator excites four patch antenna elements. Moreover, a PSK modulator is adopted for binary phase switching between 0˚ and 180˚. Using in/anti-phase RF signal combination of the antenna elements, it is possible to switch between two beams, sum and difference radiation patterns. The proposed structure is fabricated and tested; the measured results verify the dual-beam switching concept with an effective isotropic radiated power (EIRP) of +17.77 dBm, DC-to-RF efficiency of 0.43%, and an oscillator figure of merit (FOM) of -158.05 dBc/Hz at the second harmonic frequency of 14.7 GHz.
2. Qian, Y. and T. Itoh, "Progress in active integrated antennas and their applications," IEEE Trans. Microw. Theory Techn., Vol. 46, No. 11, 1891-1900, 1998.
doi:10.1109/22.734506
3. Toyoda, I., Y. Furukawa, E. Nishiyama, T. Tanaka, and M. Aikawa, "Polarization agile self-oscillating active integrated antenna for spatial modulation wireless communications," Electron Comm. Jpn., Vol. 101, No. 11, 37-44, 2018.
doi:10.1002/ecj.12123
4. Hasan, M., E. Nishiyama, and I. Toyoda, "A polarization switchable active integrated array antenna with a single-lambda slot-ring Gunn oscillator and PSK modulator," IEICE Comm. Express, Vol. 8, No. 12, 560-565, 2019.
doi:10.1587/comex.2019GCL0044
5.. Hasan, M., H. Ushiroda, E. Nishiyama, and I. Toyoda, "A polarization switchable active array antenna integrating a multiport oscillator and PSK modulators," Proc. 2018 Asia-Pacific Microw. Conf. (APMC 2018), 1253-1255, Kyoto, Japan, 2018.
6. Hasan, M., E. Nishiyama, and I. Toyoda, "A microstrip-line Gunn oscillator loaded active integrated array antenna using inclined patches for polarization switching function," Proc. 2020 Int. Symp. Antennas Propag. (ISAP 2020), 797-798, Osaka, Japan (Virtual), 2021.
7. Hasan, M., E. Nishiyama, and I. Toyoda, "A beam switchable self-oscillating active integrated array antenna using Gunn oscillator and magic-Ts," EICE Trans. Commun., Vol. E104-B, No. 11, 2021.
8. Wu, C. and T. Ma, "Pattern-reconfigurable self-oscillating active integrated antenna with frequency agility," IEEE Trans. Antennas Propag., Vol. 62, No. 12, 5992-5999, 2014.
doi:10.1109/TAP.2014.2361897
9. Singh, R. K., A. Basu, and S. K. Koul, "A novel pattern-reconfigurable oscillating active integrated antenna," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 3220-3223, 2017.
doi:10.1109/LAWP.2017.2769798
10. Xiao, S., Z. Shao, and M. Fujise, "Pattern reconfigurable millimeter wave microstrip quasi-Yagi active antenna," Proc. 2005 Asia-Pacific Microw. Conf. (APMC 2005), Suzhou, China, 2005.
11. Liu, Z., Y. Chang, and T. Ma, "High-efficiency self-oscillating active integrated antenna using metamaterial resonators and its application to multicarrier radio frequency identification systems," IEEE Trans. Antennas Propag., Vol. 64, No. 9, 3803-3810, 2016.
doi:10.1109/TAP.2016.2589959
12. Minegishi, M., J. Lin, T. Itoh, and S. Kawasaki, "Control of mode-switching in an active antenna using MESFET," IEEE Trans. Microw. Theory Techn., Vol. 43, No. 8, 1869-1874, 1995.
doi:10.1109/22.402275
13. Chew, S. T. and T. Itoh, "A 2 × 2 beam-switching active antenna array," Proc. 1995 IEEE MTT-S Int. Microw. Symp. Dig. (IMS 1995), Vol. 2, 925-928, Orlando, FL, USA, 1995.
14. Singh, R. K., A. Basu, and S. K. Koul, "Reconfigurable oscillating active integrated antenna using two-element patch array for beam switching applications," Engineering Reports, Vol. 1, No. 7, e12071, 2019.
15. Lin, J., T. Itoh, and S. Nogi, "Mode switch in a two-element active array," 1993 IEEE Antennas Propag. Soc. and Int. Symp. Dig. (AP-S 1993), 664-667, Ann Arbor, MI, USA, 1993.
16. Hasan, M., E. Nishiyama, T. Tanaka, and I. Toyoda, "Design of dual-beam switchable self- oscillating active array antenna integrating positive feedback type Push-Push oscillator and PSK modulator," Proc. 2020 Int. Conf. Emerg. Tech. for Comm. (ICETC 2020), A4-A5, Japan (Virtual), 2020.
17. Lin, Y. and T. Ma, "Frequency-reconfigurable self-oscillating active antenna with gap-loaded ring radiator," IEEE Antennas Wirel. Propag. Lett., Vol. 12, 337-340, 2013.
doi:10.1109/LAWP.2013.2250475
18. Tanaka, T., H. Otani, and M. Aikawa, "Microwave transmitter module integrating slot array antenna, Push-Push oscillator and PSK modulator," Proc. 2010 Asia-Pacific Microw. Conf. (APMC 2010), 1023-1026, Yokohama, Japan, 2010.
19. Lima, E., T. Tanaka, and I. Toyoda, "A novel low phase noise Push-Push oscillator employing dual-feedback sub-oscillators," Progress In Electromagnetics Research M, Vol. 75, 141-148, 2018.
doi:10.2528/PIERM18080701
20. Dong, Y. and T. Itoh, "Planar ultra-wideband antennas in Ku- and K-band for pattern or polarization diversity applications," IEEE Trans. Antennas Propag., Vol. 60, No. 6, 2886-2895, 2012.
doi:10.1109/TAP.2012.2194680
21. Kawahata, K., T. Tanaka, and M. Aikawa, "A K-band Push-Push oscillator with high suppression of undesired harmonic signals," IEICE Trans. Electron., Vol. E86-C, No. 8, 1433-1437, 2003.
22. Shairi, N. A., B. H. Ahmad, and P. W. Wong, "Bandstop to allpass reconfigurable filter technique in SPDT switch design," Progress In Electromagnetics Research C, Vol. 39, 265-277, 2013.
doi:10.2528/PIERC13040313
23. Balanis, C. A., Antenna Theory: Analysis and Design, 3rd Ed., John Wiley, Hoboken, NJ, 2005.
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