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Hybrid is a key component in RF and Microwave design, and particularly for balanced power amplifier (PA). This paper describes a pragmatic approach of the quadrature hybrid component design, aligned with measurements. It considers the cell as a combination of 2 simple elements rather than X/4 lines. The hybrid becomes scalable to reach a given frequency, and can be optimized by adding simple small...
This paper presents a 28 GHz CMOS balanced Power Amplifier (PA) with integrated quadrature hybrid couplers to achieve robust load insensitivity for 5G phased array applications. The proposed balanced PA achieves a saturated output power (Psat) of 18.7dBm and a maximum Power Added Efficiency (PAEmax) of 12.4% with 17.5dB gain. It consumes 154mW and occupies 0.66mm2 of die area. Each power cell is based...
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