IEEE Microwave and Wireless Components Letters · 2018 · 81 citations · 9 references
EngineeringElectrical EngineeringAnalog ElectronicsMicroelectronicsSystem-on-chip DesignActive FiltersDigital Integrated Circuit DesignDigital Integrated CircuitsMicrowave Integrated CircuitsMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsAccuracyAnalog-to-digital Converter DesignIntegrated Active FiltersMicrowave Phase Shifter DesignPhase ShiftersPhased Array GainPhased ArraysPower Consumption
A 6-bit high-accuracy active phase shifter is developed in 0.13-μm CMOS technology for Ku-band phased arrays. Improved transformer balun with wriggly stub is applied to split the single input to differential and achieve high balance with reduced chip area. Two-stage polyphase filter (PPF) generates broadband I/Q signals with high accuracy. A main digital-toanalog convertor (DAC) controls the I/Q amplitude to achieve 6-bit phase resolution, while an auxiliary DAC compensates the amplitude/phase error introduced by balun and PPF. Consequently, high resolution along with low phase/gain error can be achieved. The phase shifter shows measured rms phase error of <;4° at 12-18 GHz and <;3° at 13-18 GHz. The measured mean gain is -2.5-1 dB, and the rms gain error is <;0.9 dB at 12-18 GHz. The total power consumption is 37.5 mW, and chip size is 0.75 × 0.32 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> excluding pads.
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Integrated Phased Array Systems in Silicon
Ali Hajimiri, Hossein Hashemi, Arun Natarajan et al. · Proceedings of the IEEE · 2005 · 188 citations