Si Li-Ming, Jiang Tao, Chang Kihun, Chen Te-Chuan, Lv Xin, Ran Lixin, Xin Hao
Department of Electronic Engineering, School of Information and Electronics, Beijing Institute of Technology, Beijing 10081, China.
Electrical and Computer Engineering Department, University of Arizona, Tucson, AZ 85721, USA.
Materials (Basel). 2010 Dec 29;4(1):73-83. doi: 10.3390/ma4010073.
Incorporation of active devices/media such as transistors for microwave and gain media for optics may be very attractive for enabling desired low loss and broadband metamaterials. Such metamaterials can even have gain which may very well lead to new and exciting physical phenomena. We investigate microwave composite right/left-handed transmission lines (CRLH-TL) incorporating ideal gain devices such as constant negative resistance. With realistic lumped element values, we have shown that the negative phase constant of this kind of transmission lines is maintained (i.e., left-handedness kept) while gain can be obtained (negative attenuation constant of transmission line) simultaneously. Possible implementation and challenging issues of the proposed active CRLH-TL are also discussed.
将诸如用于微波的晶体管和用于光学的增益介质等有源器件/介质结合起来，对于实现所需的低损耗和宽带超材料可能非常有吸引力。这种超材料甚至可以具有增益，这很可能会导致新的、令人兴奋的物理现象。我们研究了包含理想增益器件（如恒定负电阻）的微波复合左右手传输线（CRLH-TL）。通过实际的集总元件值，我们已经表明，这种传输线的负相位常数得以保持（即保持左手性），同时可以获得增益（传输线的负衰减常数）。还讨论了所提出的有源CRLH-TL的可能实现方式和具有挑战性的问题。
