نتایج جستجو برای: element circularly polarized
تعداد نتایج: 240627 فیلتر نتایج به سال:
In this paper, a dual circularly-polarized multilayer reflective surface (MRS) based on loaded ring-slots for reflectarray applications is presented. The MRS comprises wideband circular polarizer cascaded with screen independent phase shifting properties the two orthogonal linearly polarized components. first polarization conversion accomplished by four-layer periodic arrays of bisected split r...
We propose and experimentally demonstrate a high efficient circularly polarizing dichroism waveplate (CPDW) using a Si-based all-dielectric 2Dchiral metasurface. We demonstrate that the CPDW exhibits a unique dichroism in that it functions as a transmissive quarter waveplate for one of either left-or right-handed circularly polarized incident lightand a reflective mirror for the opposite polari...
Circularly polarized slot cut rectangular microstrip antenna on thinner substrate is proposed. The dimensions of the slots are modified such that the resonance frequencies of the two orthogonal modes are close to each other to realize circular polarization. To improve upon the gain, three layer suspended configuration is proposed which yields VSWR and axial ratio BW of 40 and 9 MHz, respectivel...
Planar optical lenses are fundamental elements of miniaturized photonic devices. However, conventional planar optical lenses are constrained by the diffraction limit in the optical far-field due to the band-limited wavevectors supported by free-space and loss of high-spatial-frequency evanescent components. As inspired by Einstein's radiation 'needle stick', electromagnetic energy can be delive...
Development of a high intensity, rapidly reversible, polarized electron source to serve as an injector for the Stanford Linear Accelerator is underway. Polarized electrons are obtained by iiluminating negative electron affinity GaAs with circularly polarized light of wavelength corresponding to the band gap. The present status of the project is described. It is anticipated that this source will...
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