Wireless Dual-Loaded Loop ELF Antenna

This work presents a novel wireless dual-loaded loop antenna system for extremely low frequencies. The antenna port signals are digitized and transmitted to a receiver using 802.15.4. The port sensor passband is designed for up to 108 Hz with a sampling rate of 256 samples per second. The receiver gain of 32 dB and noise figure near 1 dB makes this sensor suitable for low signal detection. Three dual-loaded loop antennas, with six sensors, can be configured orthogonally to create a three-loop antenna system suitable for extremely low frequencies, with each loop port signals transmitted across a 802.15.4 wireless channel and processed in parallel. The motivation is for detecting biological signals in terms of the six field components.