A compact dual-band planar inverted-F antenna (PIFA) working in the DVB-T (470–862 MHz) and WiMAX (3300–3800 MHz) frequency bands is presented. The antenna is designed to be integrated in a monitor-equipped device, like a television (TV) set, and meets strict space requirements. The final design fits a volume of 225X31X20 mm (LxWxH). It is composed of a series of branches, properly dimensioned and separated to generate the required resonances. A prototype has been realized with a 0.4-mm-thick aluminum foil, properly cut and folded. Results are shown in terms of reflection coefficient, radiation patterns, and gain. The antenna shows a reflection coefficient less then 6 and 10 dB, and a gain between 2.7 and 4.8 dBi and approximately equal to 3.7 dBi, in the DVB-T and WiMAX bands, respectively

The paper presents a relatively new dual band small size F-shaped antenna (Wong, K.L., "Planar Antennas for Wireless Communications", John Wiley Sons Inc., 2003; Yeh, S.H. and Wong, K.L., IEEE Antennas and Prop. Soc. Int. Symp., vol.1, p.72-5, 2002), and analyzes its installation on a side of the monitor of a portable computer. This implies that is necessary to design an antenna less than 15 mm wide. The antenna operates at the IEEE 802.11a (5.15-5.35 GHz) and the IEEE 802.11b (2.4-2.48 GHz) frequency bands. Samples of numerical results are shown, which have been calculated by resorting to a numerical code based on a method of moments (MoM)

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was DPSK encoded with a NRZ 2 31 Ϫ 1 pseudo-random binary sequence (PRBS) sequence at 10 Gb/s. The average output power after the packet generation was measured to be Ϫ11.83 dBm. The extinction ratio (ER) of the label and the optical carrier was 14.08 dB for the short payload, and 12.25 dB for the long payload.The signal was amplified and then filtered using an optical band pass filter (BPF) with 0.5-nm bandwidth, thus obtaining a measured average power of 0 dBm after the filtering. A polarization controller was used to adjust the polarization of the 45°input signal with respect to the SOA layers. The SOA was driven at 200 mA and the output signal was filtered using an optical BPF with 0.3-nm bandwidth. The recovered label and the pulses were obtained after filtering out the signal through a polarization-beam splitter (PBS). CONCLUSIONWe have experimentally demonstrated a novel label-extraction technique for all-optical time serial labeling based on self-polarization rotation in an SOA. Moreover, the proposed scheme also generates the synchronization pulses required in an all-optical core-node architecture in order to set and reset the optical flip-flop that controls the wavelength converter. The packet scheme allows asynchronous and variable payload-length operation. The results show a suppression ratio from the label to the payload higher than 20 dB. ACKNOWLEDGMENTSThis work was performed under the IST projects STOLAS and LASAGNE, funded by the IST Program of the European Commission.