Twenty-GHz broadband microstrip array with electromagnetically coupled high T/sub c/ superconducting feed network

The use of high-temperature superconducting (HTS) feed lines and phase shifters can substantially improve the performance of microwave and millimeter-wave printed phased array antennas. A novel antenna architecture is described that provides a broadband radiating aperture to be used as a scanning array with compatible low-loss HTS phase shifters. The approach follows an earlier design demonstrated at 12 GHz, and this work extends the approach to 20 GHz. The antenna design, radiation patterns, bandwidth measurements, and thermal analysis are reported. A prototype thermal isolator design is described that reduces the heat load of coaxial interconnections between cryocooled and room temperature systems.

[1]  R.C. Hansen,et al.  Superconducting antennas , 1990, International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's.

[2]  W. G. Lyons,et al.  Full-wave characterization of high-T/sub c/ superconducting transmission lines , 1992, IEEE Transactions on Applied Superconductivity.

[3]  M. Davidovitz.  A low-loss thermal isolator for waveguides and coaxial transmission lines , 1996 .

[4]  V.M. Hietala,et al.  HTS-based switched filter banks and delay lines , 1993, IEEE Transactions on Applied Superconductivity.

[5]  G. Dionne,et al.  YBCO/ferrite low-loss microwave phase shifter , 1995, IEEE Transactions on Applied Superconductivity.

[6]  Jerzy Krupka,et al.  Dielectric properties of single crystals of Al/sub 2/O/sub 3/, LaAlO/sub 3/, NdGaO/sub 3/, SrTiO/sub 3/, and MgO at cryogenic temperatures , 1994 .

[7]  J. Herd.  Full Wave Analysis of Proximity Coupled Rectangular Microstrip Antenna Arrays , 1991 .

[8]  K.B. Bhasin,et al.  Performance of TlCaBaCuO 30 GHz 64 element antenna array , 1993, IEEE Transactions on Applied Superconductivity.

[9]  T. Itoh,et al.  Phenomenological loss equivalence method for planar quasi-TEM transmission lines with a thin normal conductor or superconductor , 1989 .

[10]  D. Schaubert,et al.  Analysis of an infinite array of rectangular microstrip patches with idealized probe feeds , 1984 .

[11]  Robert J. Mailloux,et al.  Phased Array Antenna Handbook , 1993 .

[12]  A. Contolatis,et al.  30 GHz Multi-Bit Monolithic Phase Shifters , 1985, Microwave and Millimeter-Wave Monolithic Circuits.

[13]  D. Pozar,et al.  Full-Wave Analysis of Microstrip Open-End and Gap Discontinuities , 1985 .

[14]  J. A. Weiss,et al.  Ferrite-superconductor devices for advanced microwave applications , 1996 .

[15]  M. J. Schindler,et al.  A 3 bit K/Ka band MMIC phase shifter , 1988, IEEE 1988 Microwave and Millimeter-Wave Monolithic Circuits Symposium. Digest of Papers..

[16]  J.T. Williams,et al.  High temperature superconductors and their application in passive antenna systems , 1990, IEEE Antennas and Propagation Magazine.

[17]  D. Hayes,et al.  Experimental results on a scanned beam microstrip antenna array with a proximity coupled YBCO feed network , 1993, IEEE Transactions on Applied Superconductivity.

[18]  Jr. P. Carter,et al.  Mutual impedance effects in large beam scanning arrays , 1960 .

[19]  C. Krowne,et al.  On the application of complex resistive boundary conditions to model transmission lines consisting of very thin superconductors , 1989 .

[20]  D. Jackson,et al.  A general analysis of propagation along multiple-layer superconducting stripline and microstrip transmission lines , 1990 .

[21]  Nathan Newman,et al.  High-temperature superconducting microwave devices: Fundamental issues in materials, physics, and engineering , 1993 .