Dual-band integrated antennas for DVB-T receivers

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Abstract

An overview on compact Planar Inverted-F Antennas (PIFAs) that are suitable for monitor-equipped devices is presented. In particular, high efficiency PIFAs (without any dielectric layer) with a percentage bandwidth (%BW) greater than 59% (470-862 MHz DVB-T band) are considered. In this context, two PIFA configurations are reviewed, where a dual-band feature has been obtained, in the 3300-3800 MHz (14% percentage bandwidth) WiMAX and 2400-2484 MHz (2.7% percentage bandwidth) WLAN IEEE 802.11b,g frequency bands, respectively, to also guarantee web access to on-demand services. The two PIFAs fill an overall volume of 225×31×20 mm3 and 207×12×8 mm 3, respectively. They are composed of a series of branches, properly dimensioned and separated to generate the required resonances. Finally, to show the extreme flexibility of the previous two configurations, a novel dual-band L-shape PIFA has been designed. A reflection coefficient less than -6 dB and -10 dB and an antenna gain of around 2 dBi and 6.3 dBi have been obtained in the 470-862 MHz DVB-T band and the 2400-2484 MHz WLAN band, respectively. The L-shape PIFA prototype can be obtained by properly cutting and folding a single metal sheet, thus resulting in a relatively low-cost and mechanically robust antenna configuration. © 2013 Andrea D'alessandro et al.

Figures

  • Figure 1: Example of a typical monitor chassis; the available space for the antenna is highlighted in a light color.
  • Figure 3: A PIFA consisting of a planar rectangular monopole toploaded with a rectangular patch attached to two rectangular plates, one is shorted to the ground and the other is suspended [13].
  • Figure 2: A PIFAwhere bandwidth enlargement can be achieved by optimizing the widths of the feeding and shorting plates [12].
  • Figure 4: A PIFA where a large impedance bandwidth has been obtained by using a capacitive feeding [14].
  • Figure 5: The inclusion of a T-shaped slot as well as a folded patch results in awide impedance bandwidth in the PIFApresented in [15].
  • Figure 6: A PIFA characterized by a driven (fed) radiating element separated by a small gap from a parasitic branch [16].
  • Figure 7: Conf. A: 3D view.
  • Figure 9: Measured reflection coefficient for the two PIFAs in [16, 18], in the DVB-T band.

References Powered by Scopus

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APA

D’Alessandro, A., Caso, R., Pino, M. R., & Nepa, P. (2013). Dual-band integrated antennas for DVB-T receivers. International Journal of Antennas and Propagation. https://doi.org/10.1155/2013/941924

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