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 [email protected]
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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. [email protected]. Outline. - PowerPoint PPT Presentation
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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
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.
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Lodge’s biconical antennas (1898) Carter’s improved match biconical antennas (1939)
Antenna Development
The antennas are bulky and too heavy for portable device
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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
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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.
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Frequency range :1.38-11.45GHz Ratio Impedance bandwidth: 8.3:1
The perpendicular ground plane leads to antennas with high profiles which is
inconvenience for integrating with monolithic microwave integrated circuits (MMIC).
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.
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Microstrip-feed Printed Monopole Antenna
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.
Impedance bandwidth ratio : 3.52:1 Frequency range :2.78-9.78GHz
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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.
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Disc Elliptical patch
DisconeTrapezoid ground plane
Coaxial-feeding line CPW feeding line
Complanation Transform from Discone Antenna
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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.
Performance for antenna with Trapezoid Ground Plane
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.2
.1
10.71.7
6.3
No
No
BW
BW
.6
.4
21.62
11.6
No
No
BW
BW
.4
.3
11.61.6
7.2
No
No
BW
BW
tapered
trapeziform
Elliptical
Performance Comparison between different printed antenna
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(a) (b) (c)
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.
With the frequency increasing, cross polarization increased. Reverse current lead to pattern distortion and horizontal current lead to cross polarization enhanced.
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Modified Microstrip-fed printed monopole
Based on modified CPW-fed printed
monopole, two modified microstrip-fed
monopole are proposed
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Antenna typeRatio
bandwidth
VSWR≤2
bandwidth (GHz)
VSWR≤2
Ordinary antenna 20:1 0.47 – 9.8
Proposed antenna 59:1 0.47-28
Modified Microstrip-fed printed monopole
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Measured bandwidth: 1.08-27.4 GHz, ratio bandwidth:25:1