基于复合左右手传输线的微波振荡器设计

发布时间：2018-08-03 14:35

【摘要】：在通信、导航和雷达等微波射频系统中,信号产生电路是必不可少的,而在这其中,振荡器是非常核心的器件。随着微波技术和通信技术的迅速发展,对振荡器性能方面的要求也与日俱增,其中较为重要的要求是振荡器尺寸小,成本消耗少,噪声低,稳定性和可靠性高。振荡器是一种能用来产生重复电子讯号的器件,其构成的电路叫做振荡电路。振荡器的最基本组成部分有三项：一是三极管,其主要起能量控制的作用；二是反馈网络；三是选频网络,其主要用来选取所需要的振荡频率。左手材料是一种具有独特电磁特性的超材料,是微波电磁领域的一个新兴热点,因其具有很好的应用前景,吸引了越来越多人的关注和研究。目前比较普遍的关于左手材料的实现方法有两种,一种是基于Smith模型的改进或者衍生结构,另一种则是复合左右手传输线及其简化的模型。本文详细讲述了1.85GHz基于复合左右手传输线的微波振荡器的设计过程以及仿真结果,选择1.85GHz是因为此频率的振荡器可应用于DCS1800通信中。此款振荡器的选频网络由基于复合左右手传输线基本单元所设计的零阶谐振器与微带线耦合而成,其具有左手材料的特性,能使振荡器满足实际应用中体积小成本消耗、稳定性、谐波抑制性等方面的高要求。
[Abstract]:In microwave RF systems such as communication, navigation and radar, the signal generation circuit is essential, in which the oscillator is the core device. With the rapid development of microwave technology and communication technology, the demand for oscillator performance is increasing. The more important requirements are small size, low cost, low noise, high stability and reliability. An oscillator is a device that can be used to generate repetitive electronic signals. The circuit is called an oscillating circuit. There are three basic components of the oscillator: one is the Triode, which plays the role of energy control, the other is the feedback network, and the third is the frequency selection network, which is mainly used to select the desired oscillation frequency. Left-handed material is a kind of supermaterial with unique electromagnetic properties, which is a new hot spot in microwave electromagnetic field. Because of its good application prospect, it has attracted more and more attention and research. At present, there are two common methods for the realization of left-handed materials, one is an improved or derivative structure based on the Smith model, the other is a composite left-hand transmission line and its simplified model. In this paper, the design process and simulation results of 1.85GHz microwave oscillator based on compound left-hand transmission line are described in detail. The 1.85GHz is selected because the oscillator with this frequency can be used in DCS1800 communication. The frequency selection network of the oscillator is composed of a zero-order resonator and a microstrip line coupling designed based on the basic unit of the compound left-hand transmission line. It has the characteristics of left-handed material and enables the oscillator to meet the small cost consumption in practical application. Stability, harmonic suppression and other aspects of high requirements.
【学位授予单位】：江西师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN752

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