Wave Interactions in Planar Active Circuit Structures
As the operating frequency of the integrated circuits is increased toward millimeter-waves, it becomes necessary to characterize the wave interactions with active devices. This is due to the following reasons. As the frequency is increased, the device size can be a substantial fraction of the wavelength. Hence, the distributed effect in the device can no longer be negligible. An example of modeling for such a situation is presented. On the other hand, wave interactions with solid state devices in an integrated circuit environment can be used for development of new device structures and components. In addition, understanding of the wave interaction can lead to finding a favorable environment to maximize the capability of the active devices. Several examples for modeling and design of such configurations are presented. Due to the infancy of this thrust, there remain a number of problems and limitations which will have to be addressed.
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