[4] The crucial period in the development of the microwave field occurred during World War II, when the magnetron furnished a reliable source of electromagnetic waves and made radar feasible, but progress was initially slow because designs had employed empirical and cut-and-try procedures.

He also worked closely with the physicists and mathematicians responsible for the theoretical part of the systematic program, and showed them how to cast their solutions in engineering terms.

Since Marcuvitz played the key role in coordinating the theoretical and experimental phases, he was asked to be the author of the Waveguide Handbook (1951), which became vol.

Soon after his arrival in Cambridge, Massachusetts, Marcuvitz, together with Robert Marshak, who later became President of the City College of New York, rented a house near Harvard Square.

After that they would often discuss their research problems until midnight, after which Marcuvitz would go home to bed and Schwinger would begin his work.

This institute became widely regarded internationally as the foremost research organization in the world in microwave field theory.

MRI was also well known for its series of annual symposia on topics in the forefront of the electronics field, and for the symposium proceedings volumes, 24 in all, that accompanied them.

In 1951 he authored a textbook titled Waveguide Handbook as volume 10 of MIT Radiation Laboratory Book Series.

[9] In 1973 he coauthored with Leopold Felsen another textbook titled Radiation and Scattering of Waves which published by Prentice Hall in its Electrical Engineering Series.