100 Years of Radar by Gaspare Galati

By Gaspare Galati

This e-book deals interesting insights into the foremost technical and clinical advancements within the background of radar, from the 1st patent, taken out through Hülsmeyer in 1904, via to the current day. Landmark occasions are highlighted and engaging insights supplied into the outstanding those who made attainable the growth within the box, together with the scientists and technologists who labored independently and lower than strict secrecy in a number of international locations internationally within the Thirties and the massive businessmen who performed a huge function after global struggle II. The ebook encourages a number of degrees of examining. the writer is a number one radar researcher who's preferably positioned to provide a technical/scientific standpoint in addition to a ancient one. He has taken care to constitution and write the e-book in this kind of means as to entice either non-specialists and specialists. The ebook isn't really backed via any corporation or physique, both officially or informally, and is hence completely independent. The textual content is enriched by means of nearly 300 pictures, so much of that are unique and feature been accessed by way of special searches within the records.

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12A complex mechanical device modulated the heterodyne frequency with constant offset with respect to the transmitted frequency. The heterodyne receiver is due to Lucien Levy in 1917, and patented by Armstrong in the following year. 13A clarification is needed, as in [Tib 79] and in [Cer 95] a noticeable aspect is clearly indicated: the contract was signed with the clause “without fixed expenditure limits”, a remark entirely absent in the always well documented works by Castioni such as [Cas 87], presumably because that clause contrasts the claim by Castioni that the Italian Navy was severely limited to expenses for the radar development, at least until the Capo Matapan defeat.

In fact the waves from a reflective obstacle such as a ship or an airplane go back to the transmitter with an intensity which is very small in comparison to that of the direct field in the immediate vicinity of the oscillator, so it is very difficult to detect them. However, a careful examination of the question, and some data that I am collecting in the recent years, lead me to think that we can overcome this 16 2 The Owls and the Gufo. Birth of Italian Radar difficulty and use the ultra short wave also in order to measure the distance to the reflecting obstacle and estimate its direction.

De Feo to see carefully examined reports which will be communicated with promptness to R. Marina as the present state of the work. I wish to thank General Sacco for the useful criticisms made to my earlier report, and for his comment about the opportunity to prefer a mechanical way for the modulation. 27-4-936 XIV Engineering Specialist Head of the 1st Section Ugo Tiberio (2) In the field of anti-aircraft search, there are two very interesting possibilities: the measure of the height simultaneous with that of the distance, and the measurement of the speed of the target.

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