Design, Analysis, and Equivalent Circuit Modeling of Dual Band PIFA Using a Stub for Performance Enhancement

- Journal title : Journal of electromagnetic engineering and science
- Volume 16, Issue 3, 2016, pp.169-181
- Publisher : The Korean Institute of Electromagnetic Engineering and Science
- DOI : 10.5515/JKIEES.2016.16.3.169

Title & Authors

Design, Analysis, and Equivalent Circuit Modeling of Dual Band PIFA Using a Stub for Performance Enhancement

Yousaf, Jawad; Jung, Hojin; Kim, Kwangho; Nah, Wansoo;

Yousaf, Jawad; Jung, Hojin; Kim, Kwangho; Nah, Wansoo;

Abstract

This work presents a new method for enhancing the performance of a dual band Planer Inverted-F Antenna (PIFA) and its lumped equivalent circuit formulation. The performance of a PIFA in terms of return loss, bandwidth, gain, and efficiency is improved with the addition of the proposed open stub in the radiating element of the PIFA without disturbing the operating resonance frequencies of the antenna. In specific cases, various simulated and fabricated PIFA models illustrate that the return loss, bandwidth, gain, and efficiency values of antennas with longer optimum open stub lengths can be enhanced up to 4.6 dB, 17%, 1.8 dBi, and 12.4% respectively, when compared with models that do not have open stubs. The proposed open stub is small and does not interfere with the surrounding active modules; therefore, this method is extremely attractive from a practical implementation point of view. The second presented work is a simple procedure for the development of a lumped equivalent circuit model of a dual band PIFA using the rational approximation of its frequency domain response. In this method, the PIFA's measured frequency response is approximated to a rational function using a vector fitting technique and then electrical circuit parameters are extracted from it. The measured results show good agreement with the electrical circuit results. A correlation study between circuit elements and physical open stub lengths in various antenna models is also discussed in detail; this information could be useful for the enhancement of the performance of a PIFA as well as for its systematic design. The computed radiated power obtained using the electrical model is in agreement with the radiated power results obtained through the full wave electromagnetic simulations of the antenna models. The presented approach offers the advantage of saving computation time for full wave EM simulations. In addition, the electrical circuit depicting almost perfect characteristics for return loss and radiated power can be shared with antenna users without sharing the actual antenna structure in cases involving confidentiality limitations.

Keywords

Equivalent Circuit (EC);Equivalent/Electrical Circuit Model (ECM);Planer Inverted-F Antenna (PIFA);Rational Approximation (RA);Vector Fitting (VF);

Language

English

References

1.

J. Anguera, A. Andujar, M. Huynh, C. Orlenius, C. Picher, and C. Puente, "Advances in antenna technology for wireless handheld devices," International Journal of Antennas and Propagation, vol. 2013, article no. 838364, pp. 1-25, 2013.

2.

K. L. Wong, Planar Antennas for Wireless Communications, New York: John Wiley & Sons, 2003.

3.

R. Hossa, A. Byndas, and M. Bialkowski, "Improvement of compact terminal antenna performance by incorporating open-end slots in ground plane," IEEE Microwave and Wireless Components Letters, vol. 14, no. 6, pp. 283-285, 2004.

4.

F. Yang, X. X. Zhang, X. Ye, and Y. Rahmat-Samii, "Wide-band E-shaped patch antennas for wireless communications," IEEE Transactions on Antennas and Propagation, vol. 49, no. 7, pp. 1094-1100, 2001.

5.

J. S. Kuo and K. L. Wong, "Dual-frequency operation of a planar inverted-L antenna with tapered patch width," Microwave and Optical Technology Letters, vol. 28, no. 2, pp. 126-127, 2001.

6.

K. L. Wong, Compact and Broadband Microstrip Antennas, New York: John Wiley & Sons, 2002.

7.

N. Firoozy and M. Shirazi, "Planar inverted-F antenna (PIFA) design dissection for cellular communication application," Journal of Electromagnetic Analysis and Applications, vol. 3, no. 10, pp. 406-411, 2011.

8.

J. Chun, J. Shim, and T. S. Kim, "Design of wideband cylindrical monopole antenna," Journal of the Korean Institute of Electromagnetic Engineering and Science, vol. 7, no. 2, pp. 69-73, 2007.

9.

C. Rowell and R. Murch, "A compact PIFA suitable for dual-frequency 900/1,800-MHz operation," IEEE Transactions on Antennas and Propagation, vol. 46, no. 4, pp. 596-598, 1998.

10.

J. H. Lu and K. L. Wong, "Slot-loaded, meandered rectangular microstrip antenna with compact dual frequency operation," Electronics Letters, vol. 34, no. 11, pp. 1048-1050, 1998.

11.

H. D. Chen, "Compact circularly polarised microstrip antenna with slotted ground plane," Electronics Letters, vol. 38, no. 13, pp. 616-617, 2002.

12.

T. Sugiyama, H. Horita, Y. Shirakawa, M. Ikegaya, S. Takaba, and H. Tate, "Triple-band internal antenna for clamshell type mobile phone," Hitachi Cable Review, no. 2, pp. 26-31, 2003.

13.

M. Salehi and M. Manteghi, "Transient characteristics of small antennas," IEEE Transactions on Antennas and Propagation, vol. 62, no. 5, pp. 2418-2429, 2014.

14.

M. Hamid and R. Hamid, "Equivalent circuit of dipole antenna of arbitrary length," IEEE Transactions on Antennas and Propagation, vol. 45, no. 11, pp. 1695-1696, 1997.

15.

Y. Liao, T. H. Hubing, and D. Su, "Equivalent circuit for dipole antennas in a lossy medium," IEEE Transactions on Antennas and Propagation, vol. 60, no. 8, pp. 3950-3953, 2012.

16.

J. P. Kim, "Network modeling and circuit characteristics of aperture coupled vertically mounted strip antenna," Journal of the Korean Institute of Electromagnetic Engineering and Science, vol. 11, no. 2, pp. 122-127, 2011.

17.

T. G. Tang, Q. M. Tieng, and M. W. Gunn, "Equivalent circuit of a dipole antenna using frequency-independent lumped elements," IEEE Transactions on Antennas and Propagation, vol. 41, no. 1, pp. 100-103, 1993.

18.

Y. Liao, K. Cai, T. H. Hubing, and X. Wang, "Equivalent circuit of normal mode helical antennas using frequency-independent lumped elements," IEEE Transactions on Antennas and Propagation, vol. 62, no. 11, pp. 5885-5888, 2014.

19.

R. Bhattacharya, S. Srikanth, R. Garg, and T. Bhattacharyya, "Physics-based compact lumped circuit model of PIFA using a retarded partial element equivalent circuit," in Proceedings of IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP), Singapore, 2012, pp. 315-316.

20.

K. Boyle and L. Ligthart, "Radiating and balanced mode analysis of PIFA antennas," IEEE Transactions on Antennas and Propagation, vol. 54, no. 1, pp. 231-237, 2006.

21.

Z. Qi, F. Kan, and T. Z. Liang, "Analysis of planar inverted-F antenna using equivalent models," in Proceedings of IEEE Antennas and Propagation Society International Symposium, Washington, DC, 2005, pp. 142-145.

22.

S. C. Del Barrio, M. Pelosi, O. Franek, and G. Pedersen, "Equivalent circuit model of a high Q tunable PIFA," in Proceedings of 2001 IEEE Vehicular Technology Conference, San Francisco, CA, 2011, pp. 1-4.

23.

A. Cabedo, J. Anguera, C. Picher, M. Ribo, and C. Puente, "Multiband handset antenna combining a PIFA, slots, and ground plane modes," IEEE Transactions on Antennas and Propagation, vol. 57, no. 9, pp. 2526-2533, 2009.

24.

B. Gustavsen and A. Semlyen, "Rational approximation of frequency domain responses by vector fitting," IEEE Transactions on Power Delivery, vol. 14, no. 3, pp. 1052-1061, 1999.

25.

J. Yousaf, H. Jung, and W. Nah, "Equivalent circuit modeling of dual band PIFA using rational approximation," in Proceedings of 2014 Korea-Japan Microwave Workshop, Suwon, Korea, 2014, pp. 63-64.

26.

P. Russer, M. Righi, C. Eswarappa, and W. J. R. Hoefer, "Lumped element equivalent circuit parameter extraction of distributed microwave circuits via TLM simulation," in Proceedings of IEEE MTT-S International Microwave Symposium Digest, San Diego, CA, 1994, pp. 887-890.

27.

B. Gustavsen, "Computer code for rational approximation of frequency dependent admittance matrices," IEEE Transactions on Power Delivery, vol. 17, no. 4, pp. 1093-1098, 2002.

28.

M. Gustafsson, C. Sohl, and G. Kristensson, "Physical limitations on antennas of arbitrary shape," Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, vol. 463, no. 2086, pp. 2589-2607, 2007.

29.

R. F. Harrington, "Effect of antenna size on gain, bandwidth, and efficiency," Journal of Research of the National Bureau of Standards, vol. 64D, no. 1, pp. 1-12, 1960.

30.

IEEE Standard Test Procedures for Antennas, IEEE Standard 149-1979, 1979.

31.

G. R. DeJean and M. M. Tentzeris, "The application of lumped element equivalent circuits approach to the design of single-port microstrip antennas," IEEE Transactions on Antennas and Propagation, vol. 55, no. 9, pp. 2468-2472, 2007.