Harmonic Suppression Compact Microstrip Patch Antenna for IoT Sensor

고조파 억제를 위한 IoT 센서용 소형 마이크로스트립 패치 안테나

  • Lee, Hyun-Seung (Dept. of Electronics Engineering, Chungnam National University) ;
  • Lim, Jeong-Taek (Dept. of Electronics Engineering, Chungnam National University) ;
  • Jung, Bang-Chul (Dept. of Electronics Engineering, Chungnam National University) ;
  • Kim, Choul-Young (Dept. of Electronics Engineering, Chungnam National University)
  • 이현승 (충남대학교 전자공학과) ;
  • 임정택 (충남대학교 전자공학과) ;
  • 정방철 (충남대학교 전자공학과) ;
  • 김철영 (충남대학교 전자공학과)
  • Received : 2017.02.17
  • Accepted : 2017.06.09
  • Published : 2017.06.30


This paper proposes an antenna incorporating a bandstop filter to miniaturize the rectenna used for wireless power transmission with the emerging interest these days. To suppress the harmonics that can be re-radiated, this paper proposes a microstrip patch antenna that can suppress the harmonics while maintaining the size of the antenna by inserting a U-slot, which acts as a bandstop filter, on the ground plane of the antenna. As a result, S11 of the second harmonic(4.6GHz) was reduced from -5.61dB to -0.338dB and the efficiency was suppressed significantly from 29.76% to 1.5%. In addition, the maximum gain was reduced to -12dBi from 2.89dBi. On the other hand, at the fundamental frequency (2.45GHz), the S11 value was reduced from -18 dB to -15 dB, and the efficiency was reduced slightly from 68.2% to 60%. In the case of applying a microstrip antenna combined with the proposed bandstop filter to a rectenna, it is believed that the harmonics that degrade the performance of the rectenna can be removed effectively while reducing the large area occupied by harmonic suppression.


Bandstop filter(BSF);Wireless Power Transmission;Microstrip antenna(MSA);IoT sensor;Harmonic


Supported by : 한국연구재단


  1. J. C. Lin, "Space solar-power stations, wireless power transmissions, and biological implications," IEEE Microwave Magazine, pp. 36-2, Mar. 2002. DOI:
  2. T. W. Yoo and K. Chang, "Theoretical and experimental development of 10 and 35 GHz rectennas," IEEE Trans. Microwave Theory Tech., vol. 40, no. 6, pp. 1259-1266, June 1992. DOI:
  3. C. Brown and J.F. Triner, "Experimental thin-film, etched-circuit rectenna," IEEE MTT-S Int. Microwave Symp. Dig., pp.185-187, Jun. 1982. DOI:
  4. P. Koert, J. Cha, and M. Macina, "35 and 94 GHz rectifying antenna systems," SPS' 91-Power from Space Dig., pp.541-547, Aug. 1991.
  5. J. O. Mc Spadden, L. Fan, and K. Chang, "Design and experiments of a high-conversion-efficiency 5.8 GHz rectenna," IEEE Trans. Micro. Theory Tech., vol. 46, no. 12, pp. 2053-2060, Dec. 1998. DOI:
  6. J. O. Mc Spadden and K. Chang, "A dual polarized circular patch rectifying antenna at 2.45 GHz for microwave power conversion and detection," IEEE MTT-SInt. Micro. Symp. Dig., pp. 1749-1752, 1994. DOI:
  7. C. K. Ghosh, "Harmonics suppression of microstrip antenna using open ended stubs," Microwave and optical technology letters, vol. 58, no. 6, pp. 1340-1345, June 2016. DOI:
  8. D. J Woo, J. W, Lee, C. S Pyo, W. K. Choi, "Novel U-Slot and V-Slot DGSs for Bandstop Filter With Improved Q Factor," IEEE Trans. Micro. Theory Tech., vol. 54, no. 6, pp. 2840-2847, Jun. 2006. DOI: