Jules Fejer

Jules Fejer (; 22 January 1914 – 21 December 2002) was a Hungarian physicist. Fejer was born in Budapest, Austria-Hungary. In the late 1950s he wrote a fundamental paper on incoherent backscatter, explaining why the width of the backscattered echo was determined primarily by the ion thermal velocity rather than by the electron thermal velocity. He was one of a group of ionospheric physicists brought together by Henry G. Booker to start what became the Electrical and Computer Engineering department at the University of California, San Diego. He was elected a Fellow of the American Geophysical Union in 1990 and continued work with graduate students until 1995.