High-Gain Array Antenna Based on Composite Right/Left-Handed Transmission Line

In this paper a metamaterial-inspired antenna with high gain and good directivity is designed. Based on the concept of composite right/left-handed transmission line (CRLH-TL), the proposed antenna is realized based on three leakage wave unit cell and a left handed circular ring slot incorporated on the surface. The maximum achievable gain at the resonant frequency of 5.6GHz is 6.933 dBi, and the return loss at 5.6 GHz can be –20 db. This proposed design has a simple structure and a compact dimension of 35 mm*40 mm*1 mm, which is suitable for particular wireless communication application such as WiFi and WLAN.

A novel norsesquiterpene alkaloid from the mushroom-forming fungus Flammulina velutipes

新 norsesquiterpe 碱(1 ) 从在米饭上使发酵的形成蘑菇的真菌 Flammulina velutipes 的稳固的文化被孤立。1 的结构被分光镜的方法阐明。在 1 的 C-1 的绝对配置用圆形的二色性数据被决定他们的[Rh2 (OCOCF3 ) 4 ] 复杂。