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Dual-band reconfigurable antenna for base-station applications

Dual-band reconfigurable antenna for base-station applications

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A novel reconfigurable antenna for dual-band operation is proposed. This antenna is composed of two square patches for lower frequency (patch 1) and upper frequency (patch 2), patch 2 being embedded in the centre cavity of patch 1. Frequency control can be realised using a switching circuit placed in the backside of the radiators without any switching components and capacitor variable components such as varactors, thus the proposed antenna can overcome the structural fragility of general reconfigurable antennas and operate in wideband with high gain characteristic (23% bandwidth with 8.4 dBi gain for band 1 and 12.1% with 9.0 dBi for band 2). Using the electrical and structural characteristics, the proposed antenna can be applied in base-station antennas providing multiple communication services.

Inspec keywords: switching circuits; multifrequency antennas; capacitors; frequency control

Other keywords: electrical characteristics; capacitor variable components; switching circuit; varactors; multiple communication services; radiators; switching components; structural characteristics; frequency control; dual-band reconfigurable antenna; base-station antennas

Subjects: Capacitors; Single antennas

References

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      • D. Piazza , N.J. Kirsch , A. Forenza , R.W. Heath , K.R. Dandekar . Design and evaluation of a reconfigurable antenna array for MIMO systems. IEEE Trans. Antennas Propag. , 3
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      • J.-W. Baik , S. Pyo , T.-H. Lee , Y.-S. Kim . Switchable printed Yagi-Uda antenna with pattern reconfiguration. ETRI J. , 3
    4. 4)
      • S.-J. Wu , T.-G. Ma . A wideband slotted bow-tie antenna with reconfigurable CPW-to-slotline transition for pattern diversity. IEEE Trans. Antennas Propag. , 2
    5. 5)
      • Vinoy, K.J., Jose, K.A., Varadan, V.K., Varadan, V.V.: `Hilbert curve fractal antennas with reconfigurable characteristics', IEEE MTT-S Int. Microwave Symp., May 2001, Phoenix, AZ, USA, 1, p. 381–384.
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      • Weedon, W.H., Payne, W.J., Rebeiz, G.M.: `MEMS-switched reconfigurable antennas', IEEE AP-S Int. Symp., July 2001, Boston, MA, USA, 3, p. 654–657.
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