Non-Foster Matching Circuit Design via Tunable Inductor for VLF Receive Loop Antennas. (24th October 2017)

• Record Type: Journal Article
• Authors: Yan, Yalong; Liu, Chao; Wu, Huaning; Dong, Yinghui
• Other Names: Björninen Toni Academic Editor.
• Is Part Of: International journal of antennas and propagation. Volume 2017(2017)
• Publication Date: 2017-10-24
• Subjects: Electronic apparatus and appliances -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Antennes (Électronique); Ondes radioélectriques -- Propagation; Antennas (Electronics); Electronic apparatus and appliances; Radio wave propagation; Electronic journals; Periodicals; 621.382405
• DOI: 10.1155/2017/6198686
• Languages: English
• ISSNs: 1687-5869

Abstract

Abstract : This paper presents a non-Foster matching circuit (NFC) for very low frequency (VLF) receive loop antennas. A 1 ⁎ 1 m VLF receive loop antenna was designed with a CMOS switch-based tunable inductor built into the NFC. The NFC can be applied to different VLF loop antennas by adjusting the number and inductance of the cells in the tunable inductor. A loop antenna was matched to the designed NFC with −10 dB S 11 fractional bandwidth, marking a 383% improvement as well as enhanced transducer gain (S 21 ) compared to most bands in passive matching (over 15–30 kHz). The noise and received signal-to-noise ratio (SNR) of the matching network were assessed to find that, with a low noise floor level (4 dB) receiver, the SNR of the passive loaded antenna performs better than the non-Foster loaded antenna in VLF.