Wireless (RF) Fundametals

原创于 2009-06-29 22:15:00 发布 · 770 阅读

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本文介绍了RF电路设计中保持相位的重要性及物理尺寸对于RF性能的关键作用。文章探讨了系统设计过程中频率、信号强度、编码及调制方案之间的权衡，并强调了这些因素如何影响无线电的线性度需求。

learned from《Agilent公司射频培训教程》

RF circuit design is all about keeping things in phase!
Physical dimensions are critical to RF performance!
A second unique aspect of RF design is that physical construction affects electrical performance.
Linearity = Universal Applicability Linearity = Complexity + Cost + Current
Much of the system design is about making the proper trades among four variables:

Frequency (broadcast frequencies: regulatory agencies | internal frequencies: available components, cost, performance)
Signal Strength (output power vs. battery life, safety, government regulations, cost)
Coding (standards, Interoperability, ease of recovery--microprocessor)
Modulation Scheme (standards; interoperability, ease of recovery--microprocessor + radio influences LINERITY requirements of radio)