Two-Port Representation of an Antenna With Application to Non-Foster Matching Networks

Aberle, J.T.

doi:10.1109/tap.2008.922173

Cited by 76 publications

(42 citation statements)

References 4 publications

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“…The -parameters of the loop antenna obtained can be imported to the two-port network in a specific format (such as dataset or touchstone) in the circuit simulator accordingly. When port 2 of the two-port network is terminated in the system impedance ( 0 ), the antenna's input impedance can be obtained as follows [4]:…”

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

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Non-Foster Matching Circuit Design via Tunable Inductor for VLF Receive Loop Antennas

Yan

Liu

et al. 2017

International Journal of Antennas and Propagation

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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 11 fractional bandwidth, marking a 383% improvement as well as enhanced transducer gain ( 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.

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Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

“…Several NFC topologies have been reported to date [3][4][5], most of which were designed for enhanced stability and bandwidth performance. Earlier researchers mainly concentrated studies on the high frequency (HF) band [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Non-Foster Matching Circuit Design via Tunable Inductor for VLF Receive Loop Antennas

Yan

Liu

et al. 2017

International Journal of Antennas and Propagation

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“…The rectangular loop antenna here can be regarded as an electrically small antenna, so the real part of the antenna impedance is assumed to vary as the square of frequency, and the imaginary part is modeled as a series LC. According to the calculation method in literature [23], the elements' values of ideal non-Foster matching can be obtained as…”

Section: Passive and Ideal Non-foster Matching Networkmentioning

confidence: 99%

Non-Foster matching network design for VLF receive loop antenna

Yalong

Liu

et al. 2016

IEICE Electron. Express

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A non-Foster matching network of the receive loop antenna is applied to VLF (very low frequency) band in this paper. Based on an open stable negative impedance converter (NIC) by Linvill, a 1 Ã 1 m rectangular loop antenna is equivalent as a two-port network, and the non-Foster matching and optimization are realized by a series tunable negative capacitance and negative inductance. The stability of the non-Foster matching network is analyzed and verified also. The results show that compared with the traditional passive matching network from 15 to 30 kHz, by using the non-Foster matching technique, the receive antenna's input reactance is sufficiently canceled by the negative elements, the −10 dB S 11 fractional bandwidth is improved by 64.9%, the total network's efficiency is improved over most frequency bands.

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“…The idea of non-foster matching [23] - [27] is to use negative capacitance and negative inductance to cancel the internal capacitance and inductance of an antenna [23]. Hence, the input reactance can be minimized over broadband.…”

Section: B Non-foster Matchingmentioning

confidence: 99%

“…By reducing the VSWR at different frequency, more channels can be used without worrying about the reflected power. The implementation of the matching network using a simplified real frequency technique (SRFT) [18] - [22] and a non-foster matching technique [23] - [27] and their effect on the simultaneous information transfer and power transfer would be analyzed in this paper.…”

Section: Introductionmentioning

confidence: 99%