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A dual-frequency printed folded dipole antenna is designed with a PBG structure carved in the antenna's arms, working well at two main frequencies in wideband RFID systems. The physical size of the antenna is minimized obviously, only 42 mm times 32 mm times 2 mm, and the excellent function by two-plane antenna could be carried out on this one-plane antenna. Making an antenna sample of the novel structure...
A novel double band ceramic fractal antenna working at 2.4 GHz and 5.8 GHz is designed for the minimization requirement of RFID tag antenna. The simulated results show that when VSWR (vertical standing wave ratio) is less than 2, the antenna absolute bandwidths are up to 0.39 GHz and 1.85 GHz in 2.4 GHz and 5.8 GHz respectively , with relative bandwidths up to 15.20% and 35.82% respectively,. Considering...
For the requirements of wideband RFID antenna, we designed a ceramic spiral antenna working at 915 MHz. The simulated results show that when VSWR (vertical standing wave ratio) is less than 2, the antenna bandwidth is up to 1.22 GHz (0.57 ~1.79 GHz) absolutely and to 133.21% relatively at the central frequency of 0.9 GHz. Considering engineering processes, the influence of dielectric constant epsiv...
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