提出了一种具有带陷波特性的共面波导（CPW）馈电新型平面超宽带天线。 拟议中的天线由一个矩形的金属辐射贴片和一个锥形的弧形接地平面组成。 为了实现超宽带，引入了三种修改方式，第一种是在贴片的上角去除90度的扇形角，第二种是将贴片的底部成形为弧形，第三种修改是以便在馈线附近的接地平面的每一侧上消除一个小的风扇角度。 仿真结果表明，对于VSWR <2，建议的天线在3.0至23 GHz的频率范围内工作。通过在辐射补丁中嵌入C形缝隙，无线局域网（WLAN）的5至6 GHz带宽之间的频带陷波将为获得这项工作中的所有模拟都是使用电磁软件Ansoft HFSS 11进行的。与最近提出的天线相比，该天线具有带宽大，带隙特性好，尺寸紧凑和易于设计的优点。 给出了拟议天线的细节，仿真结果表明该天线在整个频段上具有稳定的辐射方向图和良好的增益平坦度

Ultra-narrow linewidth, nonpolarizing guide-mode resonance (GMR) filters with single and double common resonance wavelengths are designed. The guide-mode resonance filters consist of a single grating layer with asymmetric profiles. By choosing appropriate parameters, same resonance wavelengths for both transverse electric (TE) and transverse magnetic (TM) polarizations can be achieved. Results show that high reflection (more than 99.9%) is obtained at every resonance wavelength, and the full-wid

本文报道用0.53μm波长超短脉冲序列泵浦角度调谐的LiNbO_3参量晶体,获得1%单程参量放大能量转换效率,并在0.8～1.6μm范围测得参量信号光和空载光波长调谐曲线.

Ultra-narrow-linewidth mode-locked lasers with wide wavelength tunability can be versatile light sources for a variety of newly emergent applications. However, it is very challenging to achieve the stable mode locking of substantially long, anomalously dispersive fiber laser cavities employing a nar

Single-nanowire solar cells with a unique light-concentration property are expected to exceed the Shockley–Queisser limit. The architecture of single nanowire is an important factor to regulate its optical performance. We designed a trilobal silicon nanowire (SiNW) with two equivalent scales that possesses superior light-absorption efficiency in the whole wavelength range and shows good tolerance for incident angle. The electric field distribution in this geometry is concentrated in the blade wi

A novel diode-clamped carrier stored trench bipolar transistor (CSTBT) with improved performances is proposed. The improvement has been achieved by introducing a P-layer region under the trench gate, which is connected to the cathode electrode through two integrated series diodes. In the blocking-state, almost all of the reverse voltage is sustained by Player/N-drift junction, which makes the doping concentration of the carrier stored layer is independent of the breakdown voltage,thus overcoming

Design of an Ultra-compact Metamaterial Absorber

KR QUANTEC K ultra 带F型操作说明书

Single-Mode Fiber with Ultra-Low-Loss and Large-Effective-Area.

Research on the Small-size Ultra-low Bending Loss Optical Fibers