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Modern wireless systems require low-profile antennas for high integration and low cost. Moreover, balanced antennas with differential configurations have the advantages of easy integration and low cross-polarization. This talk presents a class of novel printed balanced phase-reversal antennas with small lateral footprint and interesting properties. This type of antenna may be regarded as an evolution...
Simulated return loss and radiation patterns are shown. The antenna is well-matched around center frequency of 24 GHz. The gain at 24 GHz is 10 dBi. At frequencies other than 24 GHz, the maximum beam almost keeps constant at the broadside. This result proves that the beam bandwidth of the antenna is improved and the beam squinting problem is suppressed by the proposed center feed structure.
We present a new space-time block code (STBC) that is orthogonal, full rate and achieves full diversity for four transmit antennas when a special "triple-QPSK" modulation is used. The performance of this STBC is evaluated by Monte Carlo simulation and union bounding techniques. The pairwise error probability is presented. The analytical results match very well with the simulation results...
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