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A low cross-polarization stacked slot antenna backed by a cavity is presented. Due to the combination of stacked structure and substrate integrated waveguide technology, the bandwidth is enhanced and the parallel plate modes are suppressed. Measurements showed that a standalone antenna can achieve 22.5% fractional bandwidth and 89% radiation efficiency. Meanwhile, the use of an end stripline feed...
In the present study, a time-multiplexing current balance (TMCB) current-mode boost converter is proposed to improve the transient performance. Generally, the crossover frequency of a conventional boost converter is limited to half or less than the right-half-plane (RHP) zero to ensure the system stability. The transient performance of a conventional boost converter is degraded due to its limited...
We model fiber parametric entangled photon sources for use in quantum key distribution applications. Effects of Raman scattered photons are evaluated and are found to be manageable when appropriately detuned optical filters are employed.
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