Compact four bands hybrid filtering antenna using step impedance resonators and tuning stub transition structures

Compact four bands hybrid filtering antenna using step impedance resonators and tuning stub transition structures

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A novel compact four bands hybrid filtering antenna composed of a hybrid radiator and a four bands bandpass filter is presented. The hybrid radiator is constructed using the micro-strip line fed, the square-ring and the T-stub near the ground plane. The proposed four bands bandpass filter is composed of two parts, one is two-step impedance resonators (SIRs) and the other is the tuning stub transition structure. With tuning stub transition structure, two SIRs effectively match to 50 Ω hybrid radiator. Furthermore, the geometry of the proposed filter is U-shaped with the micro-strip fed around the hybrid radiator. The evolution of the hybrid radiator and the construction of the four bands bandpass filter using the two SIRs and the transitions are discussed in detail. The proposed filtering antenna not only possesses numerous operation bands with good band edge gain selectivity but also reduces the occupied size in the modern communication device. The overall size of the proposed filtering antenna is 33 mm × 36.4 mm × 0.508 mm, and the operation frequencies are 1.8/2.45/3.5/5.2 GHz bands for GSM1800/WLAN/WiMAX applications. The measured results agree with simulated outcomes.


    1. 1)
      • 1. Yoon, J.W., Kim, D.G., Park, C.D.: ‘Implementation of UWB antenna with bandpass filter using microstrip-to-CPW transition matching’. Proc. Asia Pacific Microwave Conf., December 2009, pp. 25532556.
    2. 2)
      • 2. Wu, W.-J., Yin, Y.-Z., Zuo, S.-L., et al: ‘A new compact filter-antenna for modern wireless communication systems’, IEEE Antennas Wireless Propag. Lett., 2011, 10, pp. 11311134.
    3. 3)
      • 3. Chuang, C.-T., Chung, S.-J.: ‘Synthesis and design of a new printed filtering antenna’, IEEE Trans. Antennas Propag., 2011, 59, (3), pp. 10361042.
    4. 4)
      • 4. Lin, C.-K., Chung, S.-J.: ‘A compact filtering microstrip antenna with quasi-elliptic broadside antenna gain response’, IEEE Antennas Wirel. Propag. Lett., 2011, 10, pp. 381384.
    5. 5)
      • 5. Chuang, C.-T., Chung, S.-J.: ‘A new compact filtering antenna using defected ground resonator’. Proc. of the 2010 Asia-Pacific Microwave Conf. (APMC), Yokohama, Japan, 7–10 December 2010, pp. 10031006.
    6. 6)
      • 6. Chuang, C.-T., Chung, S.-J.: ‘A compact printed filtering antenna using a ground-intruded coupled line resonator’, IEEE Trans. Antennas Propag., 2011, 59, (10), pp. 36303637.
    7. 7)
      • 7. Lee, Y.-J., Cao, G.-W., Chung, S.-J.: ‘A compact dual-band filtering microstrip antenna with the same polarization planes’. Proc. AsiaPacific Microwave Conf., 2012, pp. 11781180.
    8. 8)
      • 8. Hsieh, C.-Y., Wu, C.-H., Ma, T.-G.: ‘A compact dual-band filtering patch antenna using step impedance resonators’, IEEE Antennas Wirel. Propag. Lett., 14, pp. 10561059, 2015.
    9. 9)
      • 9. Mao, C.-X., Gao, S., Wang, Y., et al: ‘Dual-band patch antenna with filtering performance and harmonic suppression’, IEEE Trans. Antennas Propag., 2016, PP, (99), pp. 11.
    10. 10)
      • 10. Santasri, K., Debjani, M.: ‘A planar microstrip-fed tri-band filtering antenna for WLAN/WiMAX applications’, Microw. Opt. Technol. Lett., 2015, 57, (1), pp. 233237.
    11. 11)
      • 11. Zhang, G., Wang, J., Wu, W.: ‘Wideband balun bandpass filter explored for a balanced dipole antenna with high selectivity’, Electron. Lett., 2016, 52, (13), pp. 11531155.
    12. 12)
      • 12. Tang, M.-C., Shi, T., Ziolkowski, R.W.: ‘Planar ultrawideband antennas with improved realized gain performance’, IEEE Trans. Antennas Propag., 2016, 64, (1), pp. 6169.
    13. 13)
      • 13. Wu, W.-J., Zuo, S.-L., Huang, X.-M., et al: ‘Compact dual-band loop-loaded monopole with integrated band-select filter for WLAN application’. Proc. Antennas, Propagation, EM Theory, 2012, pp. 381383.
    14. 14)
      • 14. Sun, G.-H., Wong, S.-W., Zhu, L., et al: ‘A compact printed filtering antenna with good suppression of upper harmonic band’, IEEE Antennas Wirel. Propag. Lett., 2016, 15, pp. 13491352.
    15. 15)
      • 15. Zhang, S., Zhu, L.: ‘Synthesis design of dual-band bandpass filters with λ/4 stepped-impedance resonators’, IEEE Trans. Microw. Theory Tech., 2013, 61, (5), pp. 18121819.
    16. 16)
      • 16. Kim, C.H., Chang, K.: ‘Independently controllable dual-band bandpass filters using asymmetric stepped-impedance resonators’, IEEE Trans. Microw. Theory Tech., 2011, 59, (12), pp. 30373047.
    17. 17)
      • 17. Wu, H.W., Yang, R.Y.: ‘A new quad-band bandpass filter using asymmetric stepped impedance resonators’, IEEE Microw. Wirel. Compon. Lett., 2011, 21, (4), pp. 203205.
    18. 18)
      • 18. Lin, T.W., Lok, U.H., Kuo, J.T.: ‘New dual-mode dual-band bandpass filter with quasi-elliptic function passbands and controllable bandwidths’. IEEE MTT-S Int. Microwave Symp. Digest, Anaheim, CA, 2010, pp. 576579.
    19. 19)
      • 19. Zhu, L., Sun, S., Li, R.: ‘Microwave bandpass filters for wideband communications’ (Wiley, Hoboken, 2012).

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