Accession Number:

ADA614351

Title:

Superconducting Quantum Interference Devices for the Detection of Magnetic Flux and Application to Airborne High Frequency Direction Finding

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s):

Report Date:

2015-03-26

Pagination or Media Count:

138.0

Abstract:

Electrically small antennas trade reception performance for physical size reduction. The SQUID maximizes the reception performance still achieving a physically small size leading to satisfying the demanding antenna requirements of an airborne high frequency direction finding antenna system. High frequency electromagnetic reception for a direct current DC superconducting quantum interference device SQUID is simulated using the resistor-capacitor-shunted-junction RCSJ electronic circuit model, producing a set of two-dimensional ordinary differential equations to describe the electrical operating characteristics for the DC SQUID. A time-varying magnetic flux, consisting of frequencies from the HF band, is applied to characterize the voltage response of the DC SQUID. An instantaneous voltage develops across the DC SQUID, although a fast time-average must be computed to produce usable voltage samples. These voltage samples are shown to be representative samples of the applied time-varying signal containing a voltage bias. The waveform produced from these voltage samples is periodic, while preserving the phase of the incident signal. The HF reception characteristics of a single DC SQUID is shown, including an examination for expanding the loop area, simulating a DC SQUID array. Additionally, the DC SQUID is compared to the MGL-S8A BDOT sensor using by optical responsitivity.

Subject Categories:

  • Electrical and Electronic Equipment
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE