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Recent research has validated a proof-of-concept system for real-time underground tomography using wireless signal networks. Though models have been constructed to characterize wireless signal propagation through geo-media, there lacks a thorough investigation of antenna performance under geo-property variations. In this paper, we quantitatively show that soil condition variations affect antenna functional...
This This paper reports a new width tunable ultra wide-band (UWB) Gaussian monocycle pulse (GMP) generator for radar application. The circuit is a monolithic design in low cost CMOS technology and is area efficient. The GMP is generated with a square wave generator and then differentiated. The square wave generator is actually a glitch generator using a ring oscillator as the input. The differentiator...
RF testing involves distribution of an RF source to chips. This article describes an RF embedded-testing technique that distributes RF sources to the unpackaged RF chip via an antenna. The authors demonstrate this technique on a 5-GHz low-noise amplifier, thus eliminating expensive RF probes and test fixtures.
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