monopulseadj.n.
/ˈmɒnə(ʊ)ˌpʌls/, U.S. /ˈmɑnəˌpəls/ A. adj.
1. Radar. Designating or employing a mode of radar operation in which the direction (and usually also the range) of a target is precisely determined from a single echo pulse that is detected using two or more adjacent aerials.
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society > communication > telecommunication > radio communications > [adjective] > radar > types of
sideways-looking1832
primary radar1945
shoran1946
passive1954
monopulse1955
back scatter1957
monostatic1957
side-looking1959
side scan1961
lookdown1968
1955 IRE Convention Rec. viii. 132/2 A third method for generating both positive and negative errors simultaneously..is known as monopulse radar, since all information on range and angle errors is generated from each single pulse. This very satisfactory name was proposed by Bell Telephone Laboratories engineers.
1965 D. K. Barton in R. S. Berkowitz Mod. Radar vii. 598 The monopulse radar offers reduction in tracking errors caused by target scintillation.
1970 Sci. Jrnl. May 46/1 Modern radars, such as those of the chirp or monopulse types, need compression filters to convert long shallow pulses into tall brief ones and expansion filters to do the opposite.
1991 Air Force Mag. June 44/2 One significant advance..was deployment of monopulse radar, which radiates short pulses of energy.
2. Physics. Designating or employing single pulses of laser energy.
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1968 Optics & Spectroscopy 25 248 (title) Induced Mandelstam–Brillouin scattering (IMBS) in glass in the case of selffocusing of the monopulse laser beam.
1998 Molecular Crystals & Liquid Crystals 320 425 Wave-front conjugation..in four-wave interaction..of monopulse radiation of ruby laser in dye-doped liquid crystals..was obtained.
B. n.
1. Radar. A monopulse radar; a single echo pulse as used in such radar.
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society > communication > telecommunication > radio communications > [noun] > other methods or operations > radar > signals or pulses
reply1945
interrogation1946
squitter1958
monopulse1959
1959 R. Rhodes Introd. Monopulses i. 2 It was the possibility of locating a target completely from the return of a single pulse that led to the term ‘monopulse’, suggested originally by H. T. Budenbom at the Bell Telephone Laboratories in 1946.
1965 D. K. Barton in R. S. Berkowitz Mod. Radar vii. 603 (heading) Operation of amplitude-comparison monopulse.
1991 Air Force Mag. June 44/2 Monopulse uses four overlapping beams—two for azimuth, two for elevation—with circuitry so arranged that, when the target is at center, output voltage vanishes.
2. Physics. A single pulse of laser energy.
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1972 Jrnl. Engin. Physics 23 1413 The velocities of droplets in a two-phase stream are determined with the aid of a ruby laser as the light source operating in the mode of two successive monopulses.
1996 Proc. SPIE (Internat. Soc. Optical Engin.) 2713 361 The appearance on the surface of metals of microcraters, microparticles and continuity breaks..was experimentally observed under the action of laser monopulses of duration 40 ns and 300 ns.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.n.1955