Spectral inverse scattering theory for inhomogeneous dielectric waveguides and devices

Article Abstract:

The electromagnetic inverse scattering theory for inhomogeneous dielectric waveguides and devices are reviewed for optimal design capacities. The inhomogeneous core width of a single-mode planar waveguide is larger than those resulting from traditional methods. This provides advantages for dielectric waveguides because more efficient interconnections can be made. The effects of inhomogeneous core design in nonguided or radiated modes as well as in guided modes can be taken into account and incorporated into the design from the beginning. Soliton propagation in dielectric waveguides, solved by using the inverse scattering transform, can be applied to high-capacity optical communications. One-dimensional inverse scattering theory, in general, can be reduced to three-dimensional inhomogeneous dielectrics.

Design, Technical, Microwaves, Waveforms, Wave propagation, Theory of Computation, Spectrometry, Optical Computers

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Harold Alden Wheeler: a lifetime of applied electronics

Article Abstract:

Harold Alden Wheeler is an electronics engineer who contributed to the development of radio, television and radar. He experimented with radio before the broadcasting system was developed and made his most famous invention in 1925, a circuit for automatic volume control, now referred to as automatic gain control, that is still used in all AM radios. He made many contributions to the development of AM, FM and shortwave receivers, as well as television receivers. He also excelled in developing test equipment and specialized in the design of antennas and transmission lines. His list of honors includes the IEEE Medal of Honor.

Radio and Television Broadcasting, Electronic Components and Accessories, Institute of Electrical and Electronics Engineers, Achievements and awards, Electronics, Biographies, Electrical engineering, Digital television, Biography, Radio Industry, Wheeler, Harold Alden

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