Multi-resonant double-sided high-temperature superconductive...

Details Multi-resonant double-sided high-temperature superconductive... Multi-resonant double-sided high-temperature superconductive...

2005-07-05

2005-07-05

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C455S561000

Reexamination Certificate

active

06914576

ABSTRACT:
A group of Double-Sided High-TcSuperconducting (HTS) Magnetic-Dipole Micro-Antennas is provided. The multi-resonant double-sided HTS magnetic dipole micro-antenna are fabricated using thin-film (τYBCO≈3000 Å) YBCO material (with Tc≈92 K). The substrate is a single LaAlO3crystal (with the loss-tangent of tan δ≈10−5, εr≈24) with the thickness of τLAO≈508 μm. Each antenna is comprised of a combination of co-centric loop and spiral structures, patterned on both sides of the substrate without ground plane. Due to their geometric structures, each antenna demonstrates a multi-resonant characteristic. The comparison between the overall dimensions of the device (22×22 mm2) and variation of the wavelength at resonances indicate a typical ratio of D/λ≈10−2between the largest loop diameter and the longest wavelength. A multi-resonant double-sided spiral HTS magnetic dipole micro-antenna, a multi-resonant double-sided folded log-periodic HTS magnetic dipole micro-antenna and methods for reducing antenna length with a multi-resonant double-sided HTS magnetic dipole micro-antenna are also provided.

REFERENCES:
patent: 5171733 (1992-12-01), Hu
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patent: 5472935 (1995-12-01), Yandrofski et al.
patent: 6081235 (2000-06-01), Romanofsky et al.
patent: 2003/0016094 (2003-01-01), Kai et al.

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