{'fraction_non_alphanumeric': 0.02875816993464052, 'fraction_numerical': 0.01699346405228758, 'mean_word_length': 4.803030303030303, '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}}
Cutting The Cord: A Button-Sized Rectenna for Wireless Patient Monitoring Using Radiated Near-Field Signals at 2.4 GHz

A 2.4 GHz RF power transfer device is presented for wireless patient monitoring in the radiated near-field zone. Instead of near-field coils that are highly sensitive to misalignments and distance, an external button-sized rectifying antenna (rectenna) is proposed. This rectenna can be easily attached to the patient's skin or clothing. It consists of a small (15 × 25 mm2) antenna connected to a voltage doubling rectifier with a minimum conversion loss of 4.2 dB. A position sensitivity analysis is demonstrated across a 20 cm diameter, and concludes with a demonstration of a temperature sensor being activated wirelessly on a human phantom.