It was known that the smaller the wavelength in relationship to the dimensions of a typical target, such as an aircraft, the better would be the quality of the reflection, with fewer distortions due to diffraction and other noise. In the early days of what we would consider to be bulky radar equipment, when they were exploring higher frequencies, component sizes and cable lengths were becoming significant fractions of a wavelength around this frequency. There is no sudden change in electrical properties at 1 GHz but the wavelength (λ) at this frequency is 0.3 m or about one foot. For the sake of brevity, we will assume RF and microwaves to be synonymous. Within this range, RF is generally understood to be up to about 1 GHz and microwave above that. RF and microwave engineering is a specialist area of electronics engineering which addresses alternating current (AC) stimuli and responses, intentionally and unintentionally generated, operating at frequencies typically ranging from approximately 20 kHz to 300 GHz. Contents What is RF and microwave engineering? Is high speed digital related to RF? What are HF, VHF, UHF and similar designations? Why do you talk about Smith charts so much? What is skin depth and why is it important? What is EMC? What About Fourier and Laplace Transforms? How is Wireless Related to RF and Microwave? Why are Transmission Lines so Important? How are Optical Fibers Used? CAD and Other Applications (That second link was also from Wikipedia, so perhaps my comments about accuracy are only about 64% accurate). So I use Wikipedia with some caution, preferably not as a reference itself, but as a reference to other references. Whilst Wikipedia is a fantastic free online encyclopedia resource, some people consider it to be, on average, about 80% accurate. Most of the references come from reputable texts, peer reviewed journals, application notes and data sheets written by manufacturers of industry standard components. I have included references and will be adding more as I find new ones and update the pages, so you may hopefully verify what I say and possibly study the subjects in more detail. The answers are based on my experience, my opinion and my understanding of the subjects, hopefully without too many errors. Listed below are some typical questions people often ask about radio frequency (RF), microwave and high speed engineering. Radio Frequency and Microwave Design and Development He manages and owns Faraday Consultancy Limited (FCL). Chris Angove, Independent Professional EngineerĬhris Angove is a highly experienced and qualified chartered electronics engineer specialising in electrical and electronics engineering.
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