Abstract

•Phased arrays are the enabling technology for 5G-mmW; however, research is needed to find new architectures having improved performance, reduced cost, and built-in test capabilities: — Power efficiency and/or size of array: •By using improved SiGePA techniques, including harmonic termination, we can improve the back-off efficiency by ∼5X. •Reconfigurablity of array: — By using Dual-Vector Doherty, we can reconfigure the TX between a Doherty mode with improved efficiency and class-AB with improved linearity. — Built-in Self-Test of arrays: •By using code-modulated interferometry, we can extract amplitude and phase responses of all elements in parallel using a simply power detector.

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