Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1997-02-03
1999-11-30
Strecker, Gerard
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
25022719, 324 72, 3242441, 324248, 356345, G01R 2912, G01R 33032, G01J 902, G02F 100
Patent
active
059948914
ABSTRACT:
A magnetic field sensor which can be used as an active antenna is disclosed that is capable of small size, ultrawideband operation, and high efficiency. The sensor includes a multiplicity of magnetic field transducers, e.g., superconducting quantum interference devices (SQUIDs) or Mach-Zehnder modulators, that are electrically coupled in a serial array. Dummy SQUIDs may be used about the perimeter of the SQUID array, and electrically coupled to the active SQUIDs for eliminating edge effects that otherwise would occur because of the currents that flow within the SQUIDs. Either a magnetic flux transformer which collects the magnetic flux and distributes the flux to the transducers or a feedback assembly (bias circuit) or both may be used for increasing the sensitivity and linear dynamic range of the antenna.
REFERENCES:
patent: 4454522 (1984-06-01), de Lozanne
patent: 4814706 (1989-03-01), Rempt
patent: 4904940 (1990-02-01), Rempt
patent: 4906929 (1990-03-01), Rempt
patent: 5134117 (1992-07-01), DiLorio et al.
patent: 5194807 (1993-03-01), Ueda
patent: 5227715 (1993-07-01), Ito et al.
patent: 5278499 (1994-01-01), Ito et al.
patent: 5326986 (1994-07-01), Miller, Jr. et al.
patent: 5331162 (1994-07-01), Silver et al.
patent: 5600242 (1997-02-01), Hubbell
R. Welty, et al., "Two-Stage Integrated SQUID Amplifier with Series Array Output," NIST Cryogenics, manuscript received Aug. 24, 1992.
R. Welty, et al., "A Series Array of DC Squids," IEEE Transactions on Magnetics, vol. 27, No. 2, Mar. 1991, pp. 2924-2929.
N. Welker, et al., "A Superconductive H-Field Antenna System," Laboratory for Physical Sciences, College Park, Maryland, (journal unknown), (publ. date unknown) pp. 183-187.
S. Wolf, et al., "Superconducting Extremely Low Frequency (ELF) Magnetic Field Senors for Submarine Communications;" IEEE Trans. On Communicions, vol. Com-22, No. 4, Apr. 1974, pp. 549-554.
J. Davis, et al., "Development of a Superconducting ELF Receiving Antenna," IEEE Trans. on Antennas and Propagation, vol. AP-25, No. 2, March 1977, pp. 223-231.
M. Nisenoff, "The Use of SQUIDS in Low-Frequency Comminication Systems," AIP Conf. Proc., vol. 44, 1978, pp. 117-129.
K. Stawiasz, et al., "Noise Measurements of Series SQUID Arrays" IEEE Trans. on Applied Superconductivity, vol. 3, No. 1, Mar. 1993, pp. 1808-1811.
R. Hansen, "Fundamental Limitations in Antennas," Proc. of the IEEE, vol. 69, No. 2, Feb. 1981, pp. 170-182.
R. Dinger, et al., "Adaptive Methods for Motion-Noise Compensation in Extremely Low Frequency Submarine Receiving Antennas," Proc. of the IEEE, vol. 64, No. 10, Oct. 1976, pp. 1504-1511.
Hammar John C.
Strecker Gerard
The Boeing Company
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