By David K. Barton, Sergey A. Leonov
This can be a single-source connection with hundreds of thousands of phrases and ideas concerning radar, antenna, and microwave know-how. ready through 4 well-known leaders within the box, the Radar know-how Encyclopedia covers each point of the expertise, together with platforms, elements, goals, functionality positive factors, environmental results, and extra. greater than 5,000 alphabetically prepared entries supply: truly written, concise descriptions; listings of comparable phrases; distinctive equations and crystal-clear illustrations; and actual, updated references for extra complicated study full of information compiled over the complete 50-year span of radar know-how, the reference additionally bargains useful info built in Russia that has been nearly unavailable open air the rustic previously. together with 650 equations and over 800 line drawings, it is a much-needed fingertip reference.
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Extra info for Radar Technology Encyclopedia (Artech House Radar Library)
Sample text
A dual-[double]-reflector antenna consists of a main reflector and a subreflector. The feed illuminates the surface of the subreflector, from which the reflected wave travels to the surface of the main reflector (Fig. A56). In this case the length of feed transmission lines can be reduced considerably since the feed can be located near the surface of the main reflector. The most common configurations of dual-reflector antennas are the Cassegrainian (convex subreflector) and Gregorian (concave subreflector).
Examples of single-port amplifiers are Gunn diode amplifiers and IMPATT diode amplifiers. : Currie (1987), p. 415. 5% 20–100 5–10 Noise temperature (K) Traveling-wave type amplifiers can have tuning ranges of up to 20%. Quantum paramagnetic amplifiers are used in high-sensitivity input circuits of sensitive radar receivers. : Andrushko (1981), p. 155. A radio-frequency (RF) amplifier is intended for the amplification of RF input signals from the antenna, maintaining the lowest noise figure. It is also used for the suppression of interference in the auxiliary receive channels.
Among the basic characteristics of the resonant amplifier are the resonant amplification factor (gain at the resonant frequency), selectivity, noise figure, signal distortion levels, and stability. It is employed as an amplifier at radio frequencies (RF) and intermediate frequencies (IF). Sometimes this type of amplifier is termed the tuned amplifier. : Fink (1982), pp. 3; Buda (1986), p. 59. A single-port amplifier is a reflection-type amplifier based on a single-port structure, such as shown in Fig.