A 45 nm CMOS miniature phase shifter with constant amplitude response |
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Authors: | Tal Vitaly Zlotnikov Ofir Degani Igor Brouk Yael Nemirovsky |
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Affiliation: | aDepartment of Electrical Engineering, Technion-Israel Institute of Technology, Haifa, 32000, Israel;bMobility Wireless Group, Intel Corporation, Haifa, P.O. Box 1659, 31015, Israel |
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Abstract: | We present analysis, optimization, design and characterization of an integrated passive analog phase shifter at 24 GHz in a commercially available 45 nm RF-CMOS process. The design is based on a well-known RC bridge topology, which was optimized for maximum phase shift and minimal amplitude response variation versus phase and frequency. Phase is controlled by varying DC voltage on a varactor, resulting in 60° maximum phase shift with 0.1 dB amplitude variation at 24 GHz. The size of the phase shifter circuit excluding pads and input/output buffers is 40×50 μm2. |
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Keywords: | Passive phase shifters CMOS analog integrated circuits Phased arrays |
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