Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
권호 표지
DOI QR코드

DOI QR Code

Design of a CPW-fed Double-Dipole Quasi-Yagi Antenna

CPW 급전 이중 다이폴 준-야기 안테나 설계

  • Yeo, Junho (School of Computer and Communication Engineering/Information and Communication Research Center, Daegu University) ;
  • Lee, Jong-Ig (Division of Mechatronics Engineering, Dongseo University)
  • Received : 2018.07.25
  • Accepted : 2018.08.20
  • Published : 2018.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

A method for designing a DDQYA fed by a CPW is proposed in this paper. The proposed CPW-fed DDQYA consists of two series-connected strip dipoles, a ground reflector, and a strip-pair director. Instead of the conventional microstrip feed line in which the signal line is located on the substrate opposite to the antenna, a CPW is used because CPW is located on the same side with the antenna, and so the fabrication is easy. The strip-pair director is composed of two horizontally-separated strips, and it is added above the second dipole to enhance the gain in the high frequency region. A prototype of the proposed CPW-fed DDQYA is fabricated on an FR4 substrate. The fabricated antenna has a frequency band of 1.66-3.38 GHz(68.3%) for a voltage standing wave ratio < 2, and measured gain ranges 5.0-7.3 dBi over a frequency band of 1.60-2.90 GHz.

본 논문에서는 동일면 도파관(coplanar waveguide: CPW)으로 급전되는 이중 다이폴 준-야기 안테나(double-dipole quasi-Yagi antenna; DDQYA)에 대한 설계 방법을 제안하였다. 제안된 CPW-급전 DDQYA는 직렬로 연결된 두 개의 스트립 다이폴 안테나, 접지 반사기, 스트립-쌍 도파기로 구성된다. 신호선이 안테나의 반대쪽 기판에 위치하는 기존의 마이크로스트립 급전선로 대신에 CPW를 사용하여 안테나와 동일면에 급전선로가 위치하여 제작이 용이하다. 스트립-쌍 도파기는 두 개의 수평으로 분리된 스트립들로 구성되며, 고주파수 영역에서 이득을 높이기 위해 두 번째 다이폴 위에 추가하였다. 제안된 CPW-급전 DDQYA 안테나를 FR4 기판에 제작한 결과, 1.66-3.38 GHz(68.3%) 대역에서 전압 정재파비가 2 이하로 측정되었고, 이득은 1.60-2.90 GHz 대역에서 5.0-7.3 dBi로 5 dBi 이상을 유지하는 것을 확인하였다.

Keywords

HOJBC0_2018_v22n11_1518_f0001.png 이미지

Fig. 1 Configuration of proposed CPW-fed DDQYA

HOJBC0_2018_v22n11_1518_f0002.png 이미지

Fig. 2 Design procedure of the proposed CPW-fed DDQYA: (a) without director, (b) with single strip director, and (c) with strip-pair director(proposed)

HOJBC0_2018_v22n11_1518_f0003.png 이미지

Fig. 3 Performance comparison for three antenna structures in Fig. 2: (a) input VSWR and (b) gain

HOJBC0_2018_v22n11_1518_f0004.png 이미지

Fig. 4 Effect of lf2 on Input VSWR and gain characteristics: (a) VSWR and (b) gain

HOJBC0_2018_v22n11_1518_f0005.png 이미지

Fig. 5 Photograph of fabricated antenna

HOJBC0_2018_v22n11_1518_f0006.png 이미지

Fig. 6 Performance of fabricated antenna: (a) inputVSWR and (b) gain

HOJBC0_2018_v22n11_1518_f0007.png 이미지

Fig. 7 Measured radiation patterns of fabricated antenna: (a) 1.8 GHz, (b) 2.4 GHz, and (c) 3.0 GHz

Table. 1 Final design parameters of proposed CPW-fed DDQYA

HOJBC0_2018_v22n11_1518_t0001.png 이미지

References

  1. J. Yeo and J. I. Lee, "Design of double-dipole quasi-Yagi antenna with 7 dBi gain," Journal of the Korea Institute of Information and Communication Engineering, vol. 20, no. 2, pp. 245-252, Feb. 2016. https://doi.org/10.6109/JKIICE.2016.20.2.245
  2. J. Yeo and J. I. Lee, "Design of double dipole quasi-Yagi antenna with enhanced bandwidth and gain," Journal of the Korea Institute of Information and Communication Engineering, vol. 21, no. 2, pp. 252-258, Feb. 2017. https://doi.org/10.6109/JKIICE.2017.21.2.252
  3. F. Tefiku and C. A. Grimes, "Design of broad-band and dual-band antennas comprised of series-fed printed-strip dipole pairs," IEEE Transaction on Antennas and Propagation, vol. 48, no. 6, pp. 895-900, Jun. 2000. https://doi.org/10.1109/8.865221
  4. A. A. Eldek, "Design of double dipole antenna with enhanced usable bandwidth for wideband phased array applications," Progress In Electromagnetics Research, vol. 59, pp. 1-15, 2006. https://doi.org/10.2528/PIER06012001
  5. J. M. Steyn, J. W. Odendaal, and J. Joubert, "Double dipole antenna for dual-band wireless local area networks applications," Microwave and Optical Technology Letters, vol. 51, no. 9, pp. 2034-2038, Sep. 2009. https://doi.org/10.1002/mop.24540
  6. S. X. Ta and I. Park, "Wideband double dipole quasiYagi antenna using a microstrip-to-slotline transition feed," Journal of Electromagnetic Engineering and Science, vol. 13, no. 1, pp. 22-27, Mar. 2013. https://doi.org/10.5515/JKIEES.2013.13.1.22
  7. J. Yeo and J. I. Lee, "Bandwidth and gain enhancement of a series-fed two-dipole array antenna using nearby parasitic director," Microwave and Optical Technology Letters, vol. 55, no. 11, pp. 2782-2787, Nov. 2013. https://doi.org/10.1002/mop.27897
  8. J. Yeo and J. I. Lee, "Bandwidth enhancement of double-dipole quasi-Yagi antenna using modified microstrip-to-coplanar strip line balun," Journal of the Korea Institute of Information and Communication Engineering, vol. 20, no. 3, pp. 457-463, Mar. 2016. https://doi.org/10.6109/jkiice.2016.20.3.457
  9. X. Zhao, Y. Huang, X. Xue, and G. Wen, "A CPW-fed broadband quasi-Yagi antenna with low cross-polarization performance," International Journal of Electronics and Communications, vol. 83, pp. 188-192, 2018. https://doi.org/10.1016/j.aeue.2017.08.050
  10. J. Yeo and J. I. Lee, "CPW-fed wideband loop antenna for indoor digital TV applications," Journal of the Korea Institute of Information and Communication Engineering, vol. 21, no. 8, pp. 1492-1497, Aug. 2017. https://doi.org/10.6109/JKIICE.2017.21.8.1492