The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
권호 표지
DOI QR코드

DOI QR Code

A Reconfigurable Antenna for Mobile Handset Using RF Switch

RF 스위치를 이용한 이동통신 단말기용 재구성 안테나

  • Received : 2014.08.11
  • Accepted : 2014.09.15
  • Published : 2014.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a frequency reconfigurable antenna which operates at not only LTE but also other currently serviced bands. The high band(1,710-2,170 MHz) performance was satisfied through PIFA structure, and the low band performance through the additional RF Switch by changing the state between SW1 and SW2. When the RF switch is SW1 state, the operation bandwidth is 782-907 MHz (GSM), and 738-861 MHz (LTE) at OFF state. The proposed antenna has a omni-directional radiation pattern and measured peak gains were 0.04-4.68 dBi at the SW1 state and 0.92-1.53 dBi at the SW2 state, respectively. Judging from the results, proposed reconfigurable antenna is expected to be applied to LTE-Advanced mobile terminals since the antenna shows an outstanding performance.

본 논문은 LTE 대역과 현재 서비스 중인 이동통신 대역에 모두 적용 가능한 주파수 재구성 안테나에 대하여 제안하였다. 일반적인 PIFA 구조로 High-band를 만족시키고 방사체의 단락핀 끝에 RF 스위치를 부착함으로써 스위치 상태에 따라 주파수가 선택된다. 재구성 안테나는 RF 스위치가 SW1 상태일 때는 $VSWR{\leq}3:1$ 기준으로 782-907 MHz의 대역폭을 가지며 GSM 대역에서 동작한다. SW2 상태에서는 738-861 MHz의 대역폭을 가지며 LTE 대역에서 동작한다. 제안된 안테나의 이득은 SW1 상태일 때 0.04-4.68 dBi를 나타내었으며, SW2의 경우 이득은 0.92-1.53 dBi의 우수한 특성을 나타내며 H-plane에서 전방향성 방사패턴을 가진다. 이와 같은 우수한 특성으로 인하여 본 논문에서 제안된 RF 스위치를 이용한 이동통신 단말기용 재구성 안테나는 LTE-Advanced 모바일 단말기에 적용 가능 할 것으로 판단된다.

Keywords

References

  1. S. Sesia, M. Baker, and I. Toufik, "LTE--the UMTS long term evolution : from theory to practice," pp.1-6, WILEY 2009.
  2. C. Yoon, W. K. Park, S. Y. Kang, and H. D. Park, "A spiral-shaped monopole antenna for Quad-band operation of mobile handsets," Microwave and Optical Technology Letters, vol. 50, no. 11, pp.2860-2863, Nov. 2008. https://doi.org/10.1002/mop.23810
  3. C. Yoon, W. S. Kim, S. Y. Kang, H. C. Lee, and H. D. Park, "Printed monopole antenna on a thin substrate for UWB applications," Microwave and Optical Technology Letters, vol. 53, no. 6, pp.1262-1264, Jun. 2011. https://doi.org/10.1002/mop.25964
  4. C. Yoon, W. S. Kim, G. T. Jeong, S. H. Choi, H. C. Lee, and H. D. Park, "A planar CPW-fed patch antenna on thin substrate for broadband operation of ISM-band applications," Microwave and Optical Technology Letters, vol. 54, no. 9, pp.2199-2202, Sep. 2012. https://doi.org/10.1002/mop.26994
  5. Y. X. Guo, H. S. Tan, "New Compact Six-Band Internal Antenna," IEEE Antennas and wireless propagation letters, vol. 3, pp. 295-296, Dec. 2004. https://doi.org/10.1109/LAWP.2004.838814
  6. I. Ang, Y. X. Guo and M. Y. W. Chia, "Compact internal quad-band antenna for mobile phones", Microwave and Optical Technology Letters, vol. 8, no. 3, pp.217-223, Aug. 2003.
  7. L. Fan and K. Chang, "An active inverted patch antenna with wideband varactor-tuned capability," IEEE MTT-S International Microwave Symposium Digest, vol. 2, pp.923-926, Jun. 1996.
  8. C. Yoon, S. G. Hwang, G. C. Lee, W. S. Kim, W. S. Kim, H. C. Lee, C. H. Lee, and H. D. Park, "A Frequency Selecting Technique for Mobile Handset Antennas Based on Capacitance Switching", Progress In Electromagnetics Research, vol. 138, pp.99-113, Mar. 2013. https://doi.org/10.2528/PIER13011903
  9. C. Yoon, S. G. Hwang, G. C. Lee, W. S. Kim, H. C. Lee, and H. D. Park, "A reconfigurable antenna using varactor diode for LTE MIMO applications," Microwave and Optical Technology Letters, vol. 55, no. 5, pp.1141-1145, May. 2013. https://doi.org/10.1002/mop.27479
  10. C. Yoon, S. G. Hwang, G. C. Lee, W. S. Kim, H. C. Lee, and H. D. Park, "Broadband antenna with capacitive-coupling for mobile", Microwave Opt Technol Lett, vol. 55, no. 6,pp.1308-1312, Jun. 2013. https://doi.org/10.1002/mop.27532