Coaxial Transmission Lines, Related Two-Conductor Transmission Lines, Connectors, and Components: A U.S. Historical Perspective

Substrate Integrated Transmission Lines: Review and Applications

“…The long history of the development of guided-wave theory and techniques, intimately driven by the exploration of the fundamental electromagnetic theory since the original works of the earliest pioneers around the end of the 19 th century, namely Oliver Heaviside, J. J. Thomson, Oliver Lodge, and Lord Rayleigh, has been extensively discussed and documented in a number of review papers [1]- [7], through two special issues of the IEEE Transactions on Microwave Theory and Techniques (September 1984 andMarch 2002), in addition to a series of invited papers published in other issues [8]. It is noticed that the development of coaxial lines, principally motivated by early low-frequency electronics, even dates back to the time before the development of hollow metallic tube waveguides [9]. The historical account of waveguide developments demonstrates how research interest in guided waves changed over the years from ground-breaking metallic wired lines to first bulky dielectric rods, surface wave guides, and subsequently planar integrated lines.…”

Patents in Microwave Measurement: Measurement Connectors [Tidbits]

“…Bryant's review [3] covers the birth of microwave connector products following the Second World War. According to Bryant, the extremely well-known Type N was developed by a committee but named after Bell Labs designer Paul Neill.…”

“…As told by Bryant [3], the SMA connector arose out of a need for a small and lightweight microwave connector. To eliminate complexity, the connector was not hermaphroditic (like the N).…”

Rubber Tire Dust-Rice Husk Pyramidal Microwave Absorber

“…It is a common two-conductor transmission system and widely used at frequencies below about 5 GHz [53]. It is possible to use up to 20 GHz if specially constructed coaxial lines are used.…”