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Multi-channel receivers often require good phase tracking between channels. If a PIN diode current controlled attenuator (CCA) is needed in each channel, the individual CCAs should track in phase over the full control range. Variations in PIN diode complex impedance as well as component tolerances will cause phase tracking errors in a family of CCAs. A method to compare CCA topologies in terms of...
Active cancellers have long been proposed to alleviate the problem of strong nearby reflections that can saturate the front-end of the receiver in an FMCW radar. In this paper the general properties and the problem of setting an active canceller to work are discussed and the dynamic range improvement that can be achieved when an active canceller using modern MMIC components is added to an existing...
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