volume | PIER Journals

Abstract

In this paper, without using external power and active components, a design of pin coupled functional antenna tuner is presented. The tuner consists of two parts, a coupling pin and a tuning circuit. It is used to tune the bandwidth and antenna gain of the proposed slot patch antenna. The prototype, including a slot patch antenna and the tuner, was constructed and excited through a T-shape microstrip feed circuit resonated at 2.6 GHz. The impedance bandwidth BW (-10 dB return loss) of the slot patch antenna without coupling to the tuner was 3% referred to the operation frequency at 2.6 GHz. When the tuner was matched with the impedance 75 Ω through the coupling pin to the proposed antenna, the BW of the antenna was increased to 11% operated at 2.6 GHz. However, if the tuner was matched with the impedance 25 Ω to the proposed slot patch antenna, the impedance bandwidth of the antenna was increased 21% at operation frequency. Relatively uniform antenna gain was obtained when the matching impedance was decreased from 75 Ω to 20 Ω. In the meantime, the lower matching impedance corresponds to more reducing cross-polarization of the proposed slot patch antenna can be observed in the measured field patterns.

1. Turker, N., F. Gunes, and T. Yildirim, "Artificial neural design of microstrip antennas," Turk. J. Elec. Eng. & Comp. Sci., Vol. 14, No. 3, 2006.

2. Luo, Z., X. Chen, and K. Huang, "A novel electrically-small microstrip genetic antenna," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 4, 513-520, Jan. 2010.

3. Khodae, G. F., J. Nourinia, and C. Ghobadi, "A practical miniaturized U-slot patch antenna with enhanced bandwidth," Progress In Electromagnetics Research B, Vol. 3, 47-62, 2008.
doi:10.2528/PIERB07112201

4. Wang, S., H. W. Lai, K. K. So, K. B. Ng, Q. Xue, and G. Liao, "Wideband shorted patch antenna with a modified half U-slot," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 689-692, 2012.
doi:10.1109/LAWP.2012.2204716

5. Abdelaziz, A. A., "Bandwidth enhancement of microstrip antenna," Progress In Electromagnetics Research, Vol. 63, 311-317, 2006.
doi:10.2528/PIER06053001

6. Zhu, F., S.-C. S. Gao, A. T. S. Ho, T. W. C. Brown, J. Li, and J.-D. Xu, "Low-profile directional ultra-wideband antenna for see-through-wall imaging applications," Progress In Electromagnetics Research, Vol. 121, 121-139, , 2011.
doi:10.2528/PIER11080907

7. Monavar, F. M. and N. Komjani, "Bandwidth enhancement of microstrip patch antenna using Jerusalem cross-shaped frequency selective surfaces by invasive weed optimization approach," Progress In Electromagnetics Research, Vol. 121, 103-120, 2011.
doi:10.2528/PIER11051305

8. Zhang, L., Q. Zhang, and C. Hu, "The influence of dielectric constant on bandwidth of U-notch microstrip patch antenna," EEE International Conference on Ultra-wideband (ICUWB), 1-4, Nanjing, China, Sep. 2010.

9. Ahmed, O. M. H., A. R. Sebak, and T. A. Denidni, "Size reduction and bandwidth enhancement of a UWB hybrid dielectric resonator antenna for short-range wireless communications," Progress In Electromagnetics Research Letters, Vol. 19, 19-30, 2010.

10. Gujral, M., J. L.-W. Li, T. Yuan, and C.-W. Qiu, "Bandwidth improvement of microstrip antenna array using dummy EBG pattern on feedline," Progress In Electromagnetics Research, Vol. 127, 79-92, 2012.
doi:10.2528/PIER12022807

11. Mitra, D., D. Das, and S. R. Bhadra Chaudhuri, "Bandwidth enhancement of microstrip line and CPW-FED asymmetrical slot antennas," Progress In Electromagnetics Research Letters, Vol. 32, 69-79, 2012.

12. Xie, J.-J., Y.-Z. Yin, J. Ren, and T. Wang, "A wideband dual-polarized patch antenna with electric probe and magnetic loop feeds," Progress In Electromagnetics Research, Vol. 132, 499-515, 2012.

13. Liu, X., "Bandwidth-expanded U-slot patch antenna with shorting wall," International Symposium on Signals Systems and Electronics (ISSSE), 1-3, Nanjing, China, Sep. 2010.

14. Albooyeh, M., N. Kamjani, and M. Shobeyri, "A novel cross-slot geometry to improve impedance bandwidth of microstrip antennas," Progress In Electromagnetics Research Letters, Vol. 4, 63-72, 2008.
doi:10.2528/PIERL08050203

15. Bao, J.-H., F.-C. Ren, Q.-L. Huang, and X.-W. Shi, "A CPW-fed slotted antenna with loaded split ring for multiband applications," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 11-12, 1580-1586, Aug. 2012.
doi:10.1080/09205071.2012.705135

16. Chen, L.-N., Y.-C. Jiao, Y. Zhu, and F.-S. Zhang, "Dual narrow band-notched ultra-wideband planar rectangular printed antenna," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 2-3, 319-328, Jan. 2012.
doi:10.1163/156939312800030730

17. Azim, R., M. T. Islam, J. S. Mandeep, and A. T. Mobashsher, "A planar circular ring ultra-wideband antenna with dual band-notched characteristics," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 14-15, 2022-2032, Oct. 2012.
doi:10.1080/09205071.2012.724189

18. Zhou, D., S.-C. S. Gao, F. Zhu, R. A. Abd-Alhameed, and J.-D. Xu, "A simple and compact planar ultra wideband antenna with single or dual band-notched characteristics," Progress In Electromagnetics Research, Vol. 123, 47-65, 2012.
doi:10.2528/PIER11101104

19. Ssorin, V., A. Artemenko, A. Sevastyanov, and R. Maslennikov, "Compact bandwidth-optimized two element MIMO antenna system for 2.5-2.7 GHz band," Proceedings of the 5th European Conference on Antennas and Propagation, 319-323, Rome, Italy, Apr. 2011.

20. Dahlan, A. M. M. and M. R. Kamarudin, "Shorted microstrip patch antenna with parasitic element," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 2-3, 327-339, Jan. 2010.
doi:10.1163/156939310790735624

21. Jiang, X., S. Li, and G. Su, "Broadband planar antenna with parasitic radiator," Electronics Letters, Vol. 39, No. 23, 2003.
doi:10.1049/el:20031066

22. Deng, Z.-B., W. Jiang, S.-X. Gong, Y.-X. Xu, and Y. Zhang, "A new method for broadening bandwidths of circular polarized microstrip antennas by using DGS & parasitic split-ring resonators," Progress In Electromagnetics Research, Vol. 136, 739-751, 2013.

23. Zhu, F., S.-C. S. Gao, A. T. S. Ho, C. H. See, R. A. Abd-Alhameed, J. Li, and J.-D. Xu, "Design and analysis of planar ultra-wideband antenna with dual band-notched function," Progress In Electromagnetics Research, Vol. 127, 523-536, 2012.
doi:10.2528/PIER12033105

24. Feng, K., F. Meng, and R. Liu, "Coupled-fed monopole antenna with a parasitic open slot," Proceedings of 2011 Cross Strait Quad-regional Radio Science and Wireless Technology Conference (CSQRWC 2011), 523-526, Harbin, Heilongjiang, China, Jul. 2011.

25. Yang, G., Q.-X. Chu, and Z.-H. Tu, "A compact band-notched UWB antenna with controllable notched bandwidths by using coupled slots," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 14-15, 2148-2157, Jan. 2011.
doi:10.1163/156939311798072063

26. Li, C.-M. and L.-H. Ye, "Improved dual band-notched UWB slot antenna with controllable notched bandwidths," Progress In Electromagnetics Research, Vol. 115, 477-493, 2011.

27. Shu, P. and Q. Feng, "Design of a compact quad-band hybrid antenna for compass/WiMAX/WLAN applications," Progress In Electromagnetics Research, Vol. 138, 585-598, 2013.

28. Azini, A. S., M. R. Kamarudin, T. A. Rahman, H. U. Iddi, A. Y. Abdulrahman, and M. F. B. Jamlos, "Transparent antenna design for WiMAX application," Progress In Electromagnetics Research, Vol. 138, 133-141, 2013.

29., http://www.mitron.cn/product/Cables/Harbour/pdf/M17.pdf, (Data sheet of the MIL-C-17 Coaxial Cable, Harbour).

30. Lee, Y.-M., S. T. Wang, H.-C. Teng, and S. Cherng, "A functional microstrip circuit module for annular slot antenna," Progress In Electromagnetics Research, Vol. 136, 255-267, 2013.

31. Wang, C.-J. and Y. Dai, "Studies of power-combining of open slot antenna arrays," Progress In Electromagnetics Research, Vol. 120, 423-437, 2011.

32. Wu, Z. H., F. Wei, X.-W. Shi, and W.-T. Li, "A compact quad band-notched UWB monopole antenna loaded one lateral L-shaped slot," Progress In Electromagnetics Research,, Vol. 139, 303-315, 2013.

33. Fei, P., Y. Qi, and Y.-C. Jiao, "Wide slot loop antenna with distance-adjustable back-reflector for multiple narrowband antennas replacement," Progress In Electromagnetics Research, Vol. 135, 563-581, 2013.

34. Trinh-Van, S., H. B. Kim, G. Kwon, and K. C. Hwang, "Circularly polarized spidron fractal slot antenna arrays for broadband satellite communications in Ku-band," Progress In Electromagnetics Research, Vol. 137, 203-218, 2013.

35. Koffman, I., "Feed polarization for parallel currents in reflectors generated by conic sections," IEEE Trans. Antennas Propagation, Vol. 14, 37-40, Jan. 1966.
doi:10.1109/TAP.1966.1138632

Dr. Chia-Ching Chu

Dr. Lih-Shan Chen

Dr. Hsien-Chiao Teng

Dr. Shen Cherng