Ordinary Vector Network Analyzers Get Differential Port Measurement Capability

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  • Author: Dale D. Henkes
Yesterday’s discrete RF circuits are rapidly becoming replaced with today’s new RF integrated circuits (RFICs). In these new RFICs, differential or bal-anced ports are a com-mon interface for transferring RF signal power into or out of the device, since balanced circuits can solve problems with grounding. The differential RF ports of these RFICs often need to be matched to the system impedance (typically 50 ohms), or some other balanced or unbalanced termination, for optimum perfor-mance or maximum power transfer.