雙頻雙模式並行接收器的系統積體電路設計

Abstract

防止天然災難在近年來成為一個重要的問題，如果能預先經由數據統計得知是否有發生災難的可能，並且能夠預警周圍的居民將會對社會有重大的貢獻，本論文中所提到的接收與發射系統操作在雙模雙頻下，可以比較因不同頻率在降雨量不同造成的衰減來統計雨量，並且可以在一定距離之內放置許多此系統來量測小範圍的短期降雨以及長期雨量統計，由這些統計數據我們可以評估是否有造成天然災難的可能並且進一步進行其他措施。 在本篇論文中，我們將會介紹本系統中所需要的幾種電路，在系統中的用途，設計考量以及模擬結果，其中主要電路是雙頻低噪聲放大器以及高頻與中頻兩級混頻器，而其他電路雖然只是一些小電路，但在系統中也是扮演著不可或缺的角色，以下將會一一介紹並統整系統效能。

Prevention of natural disaster in recent years become an important issue, if they can advance through statistics may find out whether there is a disaster occurs, and the ability to warning surrounding residents will be a major contribution to society, the paper mentioned receiving transmitting system operating in the dual-mode dual-frequency, can be compared to statistics due to different frequencies in different rainfall attenuation caused by rainfall, and can be placed at a certain distance within the number of this system to measure the small range of short-term rain and long rainfall statistic. By these statistics, we can assess whether there is the possibility of natural disasters caused by and further other measures. In this paper, we will introduce several circuits in the system, the use of the system, design considerations, and simulation results, the main circuit is a dual-band low noise amplifier, radio frequency mixer and intermediate frequency mixer, and other circuits, although only some are small circuits, but play an indispensable role in the system, the following will be introduced one by one. In the first chapter, we will talk about our motivation and the solution we want to achieve by the system we made. In the second chapter, we introduce the small but indispensable circuits for the system working and tuning. And the third chapters introduce the main circuits in receiver front-end, and the fourth chapter is the simulation result of each block in the third chapter, then we will integrate the system efficacy calculate by the result of each block.