主動表面阻抗的研究及設計

Abstract

這是一篇關於週期性表面結構的文章，與其他文章不同的地方在於這是一個主動的週期性表面結構，亦即，此結構的表面阻抗的實數部分為負數。此結構可應用於具有磁放大器特性的反射面。本論文首先回顧有關周期性結構及表面阻抗的理論，並將重點擺在主動表面阻抗的討論上。論文也提出一種具有主動表面阻抗特性的週期性結構的設計方法，並且是第一個實現於CMOS 0.13微米製程的結構。這種週期性結構的每一單元皆由一個對稱性的共振器及一個交叉耦合差動對組成，每一單元的面積為100umX100um，亦即0.0027真空波長X 0.0027真空波長；本論文也提出一種模擬方法來驗證我所提出的主動表面阻抗的特性與理論，模擬以及量測結果皆相符合。

This paper is related to periodic surface structure, and the characteristic is the proposed periodic structure, this is an active periodic surface, that is, the real part of the surface impedance is negative. The active impedance surface acts as a magnetic amplifier and can apply as a reflection plane with amplification. The theory for the surface impedance of the periodic surface is reviewed. And the following provides the design and implementation of the first periodic surface with active surface impedance realized in CMOS 0.13um process. The proposed design comprises a symmetrical resonator and a cross-coupled differential pair which is integrated into the CCS mesh ground in layout. Size of each unit cell of the active impedance surface is 100umX100um, in the dimension of 0.0027λo X 0.0027λo while the simulation and measurement results to verify the property of active surface impedance will also be reported. The measurement center frequency is at 8.05 GHz, and the power consumption is 22.6mW. In addition, the application of the periodic active surface impedance surface is a magnetic amplifier, and the property of a magnetic amplifier is proved by the theory derivation and measurement.