Radar Technology free ebook

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On : 07:27

In : Tecnology

Book Name:Radar Technology free ebook download
Author:Guy Kouemou|Publisher:
ISBN: 0000000000 | 410 pages | PDF | 51.55 MB

Preface One of the most important inventions for the development of radars was made by Christian Huelsmeyer in 1904. The German scientist demonstrated the possibility of detecting metallic objects at a distance of a few kilometres. While many basic principles of radar, namely using electromagnetic waves to measure the range, altitude, direction or speed of objects are remained up to now practically unchanged, the user requirements and technologies to realise modern radar systems are highly elaborated. Nowadays many modern types of radar (originally an acronym for Radio Detection and Ranging) are not designed only to be able to detect objects. They are also designed or required to track, classify and even identify different objects with very high resolution, accuracy and update rate. A modern radar system usually consists of an antenna, a transmitter, a receiver and a signal processing unit. A simple signal processing unit can be divided into parameter extractor and plot extractor. An extended signal processing unit consists additionally of a tracking module. The new category of signal processing units has also the possibility of automatically target classification, recognition, identification or typing. There are numerous classifications of radars. On the one hand they can be classified by their platform as ground based, air borne, space borne, or ship based radar. On the other hand they can be classified based on specific radar characteristics, such as the frequency band, antenna type, and waveforms utilized. Considering the mission or functionality one may find another categorization, such as weather, tracking, fire control, early warning, over the horizon and more. Other types are phased array radars, also called in some literatures as multifunction or multimode radars (not necessary the same). They use a phased array antenna, which is a composite antenna with at least two basic radiators, and emit narrow directive beams that are steered mechanically or electronically, for example by controlling the phase of the electric current. Mostly radars are classified by the type of waveforms they use or by their operating frequency....

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