Antennas with Non-Foster Matching Networks

Antennas with Non-Foster Matching Networks

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Most antenna engineers are likely to believe that antennas are one technology that is more or less impervious to the rapidly advancing semiconductor industry. However, as demonstrated in this lecture, there is a way to incorporate active components into an antenna and transform it into a new kind of radiating structure that can take advantage of the latest advances in analog circuit design. The approach for making this transformation is to make use of non-Foster circuit elements in the matching network of the antenna. By doing so, we are no longer constrained by the laws of physics that apply to passive antennas. However, we must now design and construct very touchy active circuits. This new antenna technology is now in its infancy. The contributions of this lecture are (1) to summarize the current state-of-the-art in this subject, and (2) to introduce some new theoretical and practical tools for helping us to continue the advancement of this technology.The first NIC circuit that we consider is a grounded negative resistor (GNR) realized using the OPA690 op-amp from Texas ... Using the SPICE model for the device and the data sheet [11] provided by TI, an Agilent ADS model of the OPA690 can be ... From this analysis, we see that the overall power consumption is approximately 15.5 mW, which can be considered low power for a discrete circuit design.

Title:Antennas with Non-Foster Matching Networks
Author: James T. Aberle, Robert Loepsinger-Romak
Publisher:Morgan & Claypool Publishers - 2007-12-01

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