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An Integrated Bidirectional Bridge with Dual RMS Detectors for RF Power and Return-Loss Measurement

Directional couplers are used in a wide variety of applications to sense RF power, and they may appear at multiple points in a signal chain. In this article, Analog Devices explores the ADL5920, a new device that combines a broadband directional bridge-based coupler with two rms responding detectors in a 5 mm × 5 mm surface-mount package. This device offers significant advantages over conventional discrete directional couplers that struggle with the trade-off between size and bandwidth, particularly at frequencies below 1 GHz.

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