{'fraction_non_alphanumeric': 0.046485260770975055, 'fraction_numerical': 0.04195011337868481, 'mean_word_length': 4.41717791411043, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Dual-Band CMOS Standing-Wave Digitally Controlled Oscillator for Automotive Radars

The 22/75-GHz dual-band digitally controlled oscillator based on standing-wave topology is proposed. By properly choosing the capacitance and respective transmission line length, the high- and low-band frequency ratio could exceed 3 in millimeter-wave region. To resolve the low-Q property originated from the varactor, digitally controlled artificial dielectric is applied to provide high-Q digital tuning mechanism. The prototype is fabricated in TSMC 90 nm CMOS technology under 1.2V supply. It covers 20.6–22.4 GHz and its 1-MHz offset phase noise is −103.2 to −94.4 dBc/Hz at low-band mode. At highband operation, the output frequency is 74–75 GHz, and the phase noise is −91.2 to −85.4 dBc/Hz at 1-MHz offset. The current consumption for low band and high band is 6 and 14 mA, respectively.