Dr. Richard Snyder of RS Microwave

With the development of CAD simulation tools enabling prediction of interactions not only between isolated circuit elements, but between physical structures, it has been found possible to use the interactions to provide selectivity improvements in modern filter designs. This can reduce the number of physical resonating elements required to produce a proscribed ratio of stopband to passband, and thus reduce the physical size for a given performance level. Alternatively, more coupled resonances can be packaged into a given volume than if the interactions must be prevented (rather than utilized), and so more performance is possible in a given package due to the use of modern simulation combined with modern, high-precision manufacturing techniques. Contributing to the technological improvements are new materials, used in composite assemblies, to reduce the sensitivity of filters to temperature and humidity, thus reducing what is known as safeguard band, the necessary overdesign to allow for drift while maintaining passband and stopband characteristics, and enhancing RF power handling capability. The new composites also avoid the use of temperature stable steel alloys, and thus reduce weight and cost. When considering topological improvements, one finds that the concept of feed forward (when applied to filters, called cross -coupling) allows a reduction in the internal component count and thus in size, for a given performance. As might be expected, the alternate, i.e. more performance in the same size, is also possible. The phrases non-resonating nodes and non-resonating mode are relatively recent, but both have added to the arsenal of topologies and design strategies available to today’s filter designers. In this talk, we will cover both technology and topology. In the technological area, we will discuss materials, environmental compensation, manufacturing, reliability and design simulation methods, while in the area of network topology, the talk will include discussion of nodes, modes, frequency dependent coupling elements, non-commensurate coupled sections, multiplexers, active elements, switched combinations and tunable structures, with graphic examples of filters and performance for the applications in 5G and IoT.

Biography:

Dr. Richard V. Snyder is President of RS Microwave (Butler, NJ, USA), author of 90 papers, three book chapters and holds 19 patents. His interests include E-M simulation, network synthesis, dielectric and suspended resonators, high power notch and bandpass filters and active filters. He received his BS, MS and PhD degrees from Loyola-Marymount, USC and PINY. Dr. Snyder served the IEEE North Jersey Section as Chairman and 14 year Chair of the MTT-AP chapter. He chaired the IEEE North Jersey EDS and CAS chapters for 10 years. He twice received the Region 1 award. In January 1997 he was named a Fellow of the IEEE and is now a Life Fellow. In January 2000, he received the IEEE Millennium Medal. Dr. Snyder served as General Chairman for IMS2003, in Philadelphia. He was elected to ADCOM in 2004, and was the 2010 President-Elect for the MTT-S. Within the ADCOM, he served as Chair of the Standards committee, Chair of the TCC and Liaison to the EuMA. He served as an MTT-S Distinguished Lecturer, from 2007-2010, as well as a member of the Speakers Bureau. He was an Associate Editor for the IEEE Transactions on Microwave Theory and Techniques, responsible for most of the filter papers submitted during the period 2007-2010. He is a member of the American Physical Society, the AAAS and the New York Academy of Science. He was the MTT-S President for 2011. Also a reviewer for IEEE-MTT publications and the MWJ, Dr. Snyder teaches and advises at the New Jersey Institute of Technology He is a Visiting Professor at the University of Leeds, in the U.K. He served 7 years as Chair of MTT-8 and continues in MTT-8/TPC work. He was Chief Engineer for Premier Microwave. He is currently serving as a  chairs and vice chairs of many committee bith at society and IEEE Heatquarter. members of many previously 

Email:

Address:President, RS Microwave, Butler, New Jersey, United States