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Super-wideband Antenna Technologies for Next Generation Mobile Systems

Super-wideband Antenna Technologies for Next Generation Mobile Systems. Student: Jianjun Liu Student ID: 41646975 Supervisor:Karu. P. Esselle Centre for Microwave and Wireless Applications, Electronics Engineering, Macquarie University, NSW 2109, Australia. jianjun.liu@mq.edu.au. Outline.

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Super-wideband Antenna Technologies for Next Generation Mobile Systems

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  1. Super-wideband Antenna Technologies for Next Generation Mobile Systems Student: Jianjun Liu Student ID: 41646975 Supervisor:Karu. P. Esselle Centre for Microwave and Wireless Applications, Electronics Engineering, Macquarie University, NSW 2109, Australia jianjun.liu@mq.edu.au

  2. Outline Introduction Antenna requirement Antenna development and Case study Proposed extremely wideband antenna for wireless communication Systems Conclusion

  3. Wireless Communication System -41.3 dBm/MHz maximum power level for UWB

  4. Examples for existing communication standard • GPS (1.57–1.58 GHz) • WCDMA (1.92–2.17 GHz) • Bluetooth (2.4-2.48GHz) • WLAN 802.11b/g (5.15-5.825) • WLAN802.11b/g (2.4-2.4835) • Wi-max (3.3-3.6GHz) • Commercial UWB (3.1–10.6 GHz) • Vehicle UWB radar system(22-29GHz)

  5. Examples for multi-band wireless system Cellar system (GSM, Bluetooth, CDMA, USMT)

  6. Wireless Local Area Network

  7. UWB through wall image operation (0-960MHz) • Commercial UWB, localization precision(3.1–10.6 GHz) • vehicle UWB radar system(22-29GHz)

  8. Antenna Requirement Proposal A: multiple antennas are implemented Each one covers a specific operation spectrum. Disadvantage: • Occupy much space for other device • Increase the system complexity. • The installation may restrict the system updating possibility after manufacture. Proposal B: Utilize single antenna • Antenna bandwidth can cover more than one operating frequency bands of multiple wireless communication systems • Such antenna should have stable radiation-pattern characteristics over entire frequency range. • Key component • Antenna performance

  9. Antenna Development Carter’simproved matchbiconical antennas(1939) Lodge’s biconical antennas(1898) The antennas are bulky and too heavy for portable device

  10. Equiangular spiral antenna (1959) log-periodic dipole antenna (1960) The movement of the effective radiating region with frequency results in waveform distortion of a transmitted pulse

  11. Metal-plate Monopole Antennas Ratio impedance bandwidth: 13:1 Frequency range :0.8-10.5GHz J.A. Evans and M.J. Ammann. “Planar trapezoidal and pentagonal monopoles with impedance bandwidths in excess of 10:1 [C],” IEEE Antennas Propagat. Symp., vol.3, pp. 1558-1561, July, 1999.

  12. Frequency range :1.38-11.45GHzRatio Impedance bandwidth: 8.3:1 Kin-Lu Wong, Chih-Hsien Wu, and Saou-Wen Su, “Ultrawide-Band Square Planar Metal-Plate Monopole Antenna With a Trident-Shaped Feeding Strip, ” IEEE Trans. Antennas Propagation, vol.53, pp1262-1269, April, 2005. The perpendicular ground plane leads to antennas with high profiles which is inconvenience for integrating with monolithic microwave integrated circuits (MMIC).

  13. Microstrip-feed Printed Monopole Antenna Impedance bandwidth ratio : 3.52:1 Frequency range :2.78-9.78GHz J. Liang, Choo C. Chiau, X.D. Chen, et al. “Study of a Printed Circular Disc Monopole Antenna for UWB Systems” [J].IEEE Trans. Antennas Propag., 2005, 53(11):3550-3554.

  14. CPW-fed Printed Monopole Antennas Impedance bandwidth ratio : 4.4:1 Frequency range : 2.73-12GHz J. Liang, L. Guo, C.C. Chiau, X. Chen and C.G. Parini. Study of CPW-fed circular discmonopole antenna for ultra wideband applications[J].IEE Proc.-Microw. Antennas Propag.,2005,152(6):520-526.

  15. Complanation Transform from Discone Antenna Disc Elliptical patch Trapezoid ground plane Discone Coaxial-feeding line CPW feeding line

  16. Performance for antenna with Trapezoid Ground Plane S.-S. Zhong, X.-L. Liang and W. Wang, “Compact elliptical monopole antenna with impedance bandwidth in excess of 21:1,”IEEE Trans. Antennas Propagation, vol.55, pp. 3080-3085, November, 2007.

  17. Performance Comparison between different printed antenna tapered trapeziform Elliptical

  18. Characteristic Mode Analysis for Printed Antenna K. D. Akkerman, T. F. Kennedy, S. A. Long, and J. T. Williams, "Characteristic modes for planar structure feed design," in Antennas and Propagation Society International Symposium, 2005 IEEE, 2005, pp. 503-506 vol. 2B.

  19. Characteristic Mode Analysis for Printed Antenna

  20. Modified Coplanar waveguide-fed elliptical monopole The feeding terminal affect the high frequency impedance matching

  21. Modified Coplanar waveguide-fed elliptical monopole With height and width of patch increased, the lowest limit decrease and ratio bandwidth increase

  22. Modified Coplanar waveguide-fed elliptical monopole Gap is a crucial parameter, The gap variation will affect the impedance bandwidth of whole spectrum

  23. Modified Coplanar waveguide-fed elliptical monopole Substrate: Rogers permitivity:3.48，thickness:1.5mm。 b a H Dmax Measured bandwidth: 1.02-24.1 GHz, ratio bandwidth:23:1

  24. (a) (b) Maximum gain: 7.2dB Gain decrease：1 substrate loss 2 radiation shifting Smith chart (c) (d) • f=1.5GHz (b) f=5GHz • (c) f=10GHz (d) f=20GHz Modified Coplanar waveguide-fed elliptical monopole With the frequency increasing, cross polarization increased. Reverse current lead to pattern distortion and horizontal current lead to cross polarization enhanced.

  25. Modified Microstrip-fed printed monopole Based on modified CPW-fed printed monopole, two modified microstrip-fed monopole are proposed

  26. Modified Microstrip-fed printed monopole

  27. Modified Microstrip-fed printed monopole Top side Measured bandwidth: 1.08-27.4 GHz, ratio bandwidth:25:1 Back side

  28. Modified Microstrip-fed printed monopole E Plane H Plane E Plane H Plane • f=1.5GHz (b) f=5GHz (c) f=10GHz • (d) f=15GHz(e) f=20GHz

  29. Modified Microstrip-fed printed monopole Maximum gain: 6.5 dB Gain variation between 4-20 GHz: 2.5 Db

  30. Modified Microstrip-fed printed monopole Original proposed antenna Measured bandwidth: 0.85-25 GHz

  31. Modified Microstrip-fed printed monopole

  32. Modified Microstrip-fed printed monopole Top side Measured bandwidth: 0.76-35.2 GHz, ratio bandwidth:46:1 Back side

  33. Modified Microstrip-fed printed monopole E Plane H Plane E Plane H Plane • f=1.5GHz (b) f=5GHz (c) f=10GHz • (d) f=15GHz(e) f=20GHz Radiation shifting is small

  34. Modified Microstrip-fed printed monopole Maximum gain: 8.3dB, gain increases in the whole spectrum

  35. Conclusion • Three new configuration of monopole antenna for wireless applications • Four Techniques can enhance BW: 1 tapered Microstrip-feeding line 2 trapezoid ground plane 3 optimized radiation patch 4 semicircular feeding branch terminal

  36. Thanks!

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