Issued U.S. Patents

M. Dunna, D. Bharadia, D. Sievenpiper, “Virtual MIMO with Smart Surfaces”, U.S. patent 11546022, Issued January 3, 2023

D. Sievenpiper, M. Wechsberg, F. Yang, "Airship with a Radio Frequency Transparent Photovoltaic Cell", U.S. Patent 10971637, Issued April 6, 2021

D. Sievenpiper, M. Wechsberg, F. Yang, "Method of Fabricating a Radio Frequency Transparent Photovoltaic Cell", U.S. Patent 10923611, Issued February 16, 2021

D. Sievenpiper, M. Wechsberg, F. Yang, "Radio Frequency Transparent Photovoltaic Cell", U.S. Patent 9893217, Issued February 13, 2018

D. Sievenpiper, M. Wechsberg, F. Yang, "Radio Frequency Transparent Photovoltaic Cell", U.S. Patent 8853528, Issued October 7, 2014

D. Sievenpiper, “Tunable Frequency Selective Surface”, U.S. Patent 8339320, Issued December 25, 2012

D. Sievenpiper, “Multiband Tunable Impedance Surface”, U.S. Patent 8212739, Issued July 3, 2012

D. Sievenpiper, “Free-space phase shifter having series coupled inductive-variable capacitance devices”, U.S. Patent 8179331, Issued May 15, 2012

P. Herz, D. Sievenpiper, “Electronically Tunable Microwave Reflector”, U.S. Patent 8134521, Issued March 13, 2012

J. Lynch, J. Schaffner, P. Lawyer, D. Sievenpiper, “Wide Field of View Millimeter Wave Imager”, U.S. Patent 8098187, Issued January 17, 2012

D. Sievenpiper, “Method of achieving an opaque or absorption state in a tunable frequency selective surface”, U.S. Patent 8063033, Issued November 22, 2011

J. Schaffner, T.Y. Hsu, D. Sievenpiper, “Antenna having an impedance matching section for integration into apparel, “U.S. Patent 8059045, Issued November 15, 2011

M. Ganz, J. Schaffner, D. Sievenpiper, R. Berg, “Smart Chaff”, U.S. Patent 7965220, Issued June 21, 2011

B. H. Fong, J. S. Colburn, J. Ottusch, D. F. Sievenpiper, J. L. Visher, “Method and system for determining an optimized artificial impedance surface”, U.S. Patent 7929147, Issued April 19, 2011

B. H. Fong, J. S. Colburn, P. R. Herz, J. J. Ottusch, D. F. Sievenpiper, “Method for designing artificial surface impedance structures characterized by an impedance tensor with complex components”, U.S. Patent 7911407, Issued March 22, 2011

J. Colburn, D. Sievenpiper, S. Mehta, "Reflectarray", U.S. Patent 7868829, Issued January 11, 2011

D. Yap, J. Schaffner, D. Sievenpiper, K. Geary, W. Ng, J. Gregoire, J. Colburn, "Microwave Receiver Front-End Assembly and Array", U.S. Patent 7835600, Issued November 16, 2010

D. Sievenpiper, J. Colburn, B. Fong, M. Ganz, M. Gyure, J. Lynch, J. Ottusch, J. Visher, "Artificial Impedance Surface", U.S. Patent 7830310, Issued November 9, 2010

J. Lynch, J. Schaffner, P. Lawyer, D. Sievenpiper, "Wide Field of View Millimeter Wave Imager", U.S. Patent 7796080, Issued September 14, 2010

J. Lynch, J. Schaffner, D. Sievenpiper, D. Choudhury, J. Colburn, J. Schulman, H. Moyer, A. Hunter, "Low Cost Millimeter Wave Imager", U.S. Patent 7795859, Issued September 14, 2010

D. Sievenpiper, “Free-space phase shifter having one or more columns of phase shift devices”, U.S. Patent 7719477, Issued May 18, 2010

D. Sievenpiper, T. Dougherty, J. Drab, S. Robinson, “Tunable impedance surface and method for fabricating a tunable impedance surface”, U.S. Patent 7683854, Issued March 23, 2010

D. Sievenpiper, H.P. Hsu, “Antenna Structures Having Adjustable Radiation Characteristics”, U.S. Patent 7,639,207, December 29, 2009

D. Sievenpiper, “Tunable Frequency Selective Surface”, U.S. Patent 7612718, November 3, 2009

J. Lynch, J. Schaffner, D. Sievenpiper, D. Choudhury, J. Colburn, J. Schulman, H. Moyer, A. Hunter, “Low cost millimeter wave imager”, U.S. Patent  7583074, September 1, 2009

D. Sievenpiper, H. P. Hsu, T. Talty, Pasiecznik, “Control system and method for diversity antenna system“, U.S. Patent 7546146, June 9, 2009

M. Ganz, J. Schaffner, D. Sievenpiper, R. Berg, “Smart Chaff”, U.S. Patent 7533615, May 19, 2009

T. Y. Hsu, D. Sievenpiper, “Coaxial cable having high radiation efficiency”, U.S. Patent 7471258, December 30, 2008

D. Sievenpiper, “Large aperture rectenna based on planar lens structures”, U S Patent 7456803, November 25, 2008

D. Sievenpiper, H.P. Hsu, “Method for fabricating antenna structures having adjustable radiation characteristics”, U.S. Patent 7429961, September 30, 2008

H.J. Song, T.Y. Hsu, D. Sievenpiper, T. Talty, H.P. Hsu, “Method for improving the efficiency of transparent thin film antennas and antennas made by such method”, U.S. Patent 7427961, September 23, 2008

J. Lynch, D. Sievenpiper, J. Colburn, “High frequency quasi optical power source capable of solid state implementation”, U.S. Patent 7403076, July 22, 2008

M. Ganz, J. Schaffner, D. Sievenpiper, R. Berg, “Smart Chaff“, U.S. Patent 7369081, May 6, 2008

J. Schaffner, J. Lynch, D. Sievenpiper, “Antenna System and RF Signal Interference Abatement Method”, U.S. Patent 7345652, March 18, 2008

D. Gregoire, C. Massey, D. Sievenpiper, “Large-scale adaptive surface sensor arrays”, U.S. Patent 7307589, December 11, 2007

D. Gregoire, W. Williamson, K. Kirby, A. Phelps, D. Sievenpiper, “Diesel particulate filter system with meta-surface cavity”, U.S. Patent 7303603, December 4, 2007

D. Sievenpiper, “Single pole multi throw switch having low parasitic reactance and an antenna incorporating same”, U.S. Patent 7298228, November 20, 2007

H.J. Song, T.Y. Hsu, D. Sievenpiper, T. Talty, H.P. Hsu, “Method for improving the efficiency of transparent thin film antennas and antennas made by such method”, U.S. Patent 7289073, October 30, 2007

D. Sievenpiper, “Single pole multi throw switch having low parasitic reactance and an antenna incorporating same”, U.S. Patent 7276990, October 2, 2007

D. Sievenpiper, “Steerable leaky wave antenna capable of both forward and backward radiation”, U.S. Patent 7253780, August 7, 2007

D. Sievnepiper, J. Schaffner, G. Tangonan, “Adaptive beam forming antenna system using a tunable impedance surface”, U.S. Patent 7245269, July 17, 2007

J. Lynch, D. Sievenpiper, J. Colburn, “Standing wave amplifiers and oscillators”, U.S. Patent 7242518, July 10, 2007

H.J. Song, T.Y. Hsu, D. Sievenpiper, T. Talty, H.P. Hsu, “Transparent Thin Film Antenna”, U.S. Patent 7233296, June 19, 2007

D. Sievenpiper, J. Colburn, B. Fong, M. Ganz, M. Gyure, J. Lynch, J. Ottusch, J. Visher, “Artificial Impedance Structure”, U.S. Patent 7218281, May 15, 2007

D. Sievenpiper, J. Pikulski, J. Schaffner, T.Y. Hsu, “Method of Making a High-Impedance Surface”, U.S. Patent 7197800, April 3, 2007

D. Sievenpiper, “Tunable Frequency Selective Surface”, U.S. Patent 7173565, February 6, 2007

D. Sievenpiper, “Compact Tunable Antenna”, U.S. Patent 7164387, January 16, 2007

D. Sievenpiper, “Large Aperture Rectenna Based on Planar Lens Structures”, U.S. Patent 7154451, December 26, 2006

D. Sievenpiper, “Ground Plane Compensation for Mobile Antennas”, U.S. Patent 7154444, December 26, 2006

J. Schaffner, J. Lynch, D. Sievenpiper, “Antenna System and RF Signal Interference Abataement Method“, U.S. Patent 7151508, December 19, 2006

D. Gregoire, D. Sievenpiper, W. Williamson, “Meta-Surface Waveguide for Uniform Microwave Heating”, U.S. Patent 7091457, August 15, 2006

D. Sievenpiper, “Steerable Leaky Wave Antenna Capable of Both Forward and Backward Radiation”, U.S. Patent 7071888, July 4, 2006

D. Sievenpiper, “Meta-Element Antenna and Array”, U.S. Patent 7068234, June 27, 2006

D. Sievenpiper, “Low-Profile Antenna”, U.S. Patent 7050003, May 23, 2006

J. Colburn, D. Sievenpiper, “Dual-Band, Low-Profile Omnidirectional Antenna”, U.S. Patent 7042403, May 9, 2006

D. Sievenpiper, G. Tangonan, H. P. Hsu, R. Riley, G. Hanselman, "Low-Profile, Multi-Band Antenna Module", U.S. Patent 6989785, January 24, 2006

D. Sievenpiper, J. Schaffner, “Plano-convex rotman lenses, an ultra wideband array employing a hybrid long slot aperture and a quasi-optic beam former”, U.S. Patent 6982676, January 3, 2006

J. J. Lynch, D. F. Sievenpiper, “Low-Profile Slot Antenna Using Backside Fed Frequency Selective Surface”, U.S. Patent 6952190, October 4, 2005

D. F. Sievenpiper, J. H. Schaffner, J. A. Navarro, “Circularly Polarized Antenna Having Improved Axial Ratio”, U.S. Patent 6952184, October 4, 2005

D. F. Sievenpiper, H. P. Hsu, “Crossed-Slot Antenna for Mobile Satellite and Terrestrial Radio Reception”, U.S. Patent 6911952, June 28, 2005

J. H. Schaffner, J. J. Lynch, D. F. Sievenpiper, “Antenna System and RF Signal Interference Abatement Method”, U.S. Patent 6867741, March 15, 2005

D. F. Sievenpiper, “RF MEMS-Tuned Slot Antenna and a Method of Making Same”, U.S. Patent 6864848, March 8, 2005

D. F. Sievenpiper, H. P. Hsu, J. H. Schaffner, G. L. Tangonan, “Low-Profile Multi-Antenna Module and Method of Integration into a Vehicle”, U.S. Patent 6853339, February 8, 2005

D. Sievenpiper, R. Harvey, "Radio Frequency Aperture", U.S. Patent 6812903, November 2, 2004

D. M. Pepper, D. F. Sievenpiper, "Compact Sensor Using Microcavity Structures", U.S. Patent 6777244, August 17, 2004

D. F. Sievenpiper, J. L. Pikulski, J. H. Schaffner, T.-Y. Hsu, "Molded High Impedance Surface and a Method of Making Same", U.S. Patent 6739028, May 25, 2004

D. F. Sievenpiper, A. E. Schmitz, J. H. Schaffner, G. L. Tangonan, T.-Y. Hsu, R. Y. Loo, R. S. Miles, "Low-cost HDMI-D packaging technique for integrating an efficient reconfigurable antenna array with RF MEMS switches and a high impedance surface", U.S. Patent 6670921, December 30, 2003

D. Sievenpiper, "Low-Profile Slot Antenna for Vehicular Communication and Methods of Making and Designing Same", U.S. Patent 6646618, November 11, 2003

D. Sievenpiper, R. J. Harvey, "Hi-Z (Photonic Band Gap Isolated) Wire", U.S. Patent 6567057, May 20, 2003

D. Sievenpiper, T.-Y. Hsu, S.-T. Wu, D. Pepper, "Electronically Tunable Reflector" , U.S. Patent 6552696, April 22, 2003

D. F. Sievenpiper, H.-P. Hsu, J. H. Schaffner, G. L. Tangonan, "Antenna System for Communicating Simultaneously with a Satellite and a Terrestrial System" , U.S. Patent 6538261, April 8, 2003

D. Sievenpiper, R. Harvey, G. Tangonan, R. Loo, J. Schaffner, "Tunable Impedance Surface", U.S. Patent 6538621, March 25, 2003

D. Sievenpiper, "Vivaldi Cloverleaf Antenna", U.S. Patent 6518931, February 11, 2003

D. Sievenpiper, J. J. Lee, S. Livingston, "End-Fire Antenna or Array on Surface with Tunable Impedance", U.S. Patent 6496155, December 17, 2002

D. Sievenpiper, J. Schaffner, "Textured Surface Having High Electromagnetic Impedance in Multiple Frequency Bands", U.S. Patent 6483481, November 19, 2002

D. Sievenpiper, G. Tangonan, R. Loo, J. Schaffner, "Tunable Impedance Surface", U.S. Patent 6483480, November 19, 2002

D. Sievenpiper, H. P. Hsu, J. Schaffner, G. Tangonan, "Low-Profile Antenna Module, and Method of Integration into a Vehicle", U.S. Patent 6441792, August 27, 2002

D. Sievenpiper, J. Schaffner, H. P. Hsu, G. Tangonan, "Method of Providing Increased Low-Angle Radiation Sensitivity in an Antenna and an Antenna Having Increased Low-Angle Radiation Sensitivity", U.S. Patent 6433756, August 13, 2002

D. Sievenpiper, H. P. Hsu, "Polarization Converting Radio Frequency Reflecting Surface", U.S. Patent 6426722, July 30, 2002

J. H. Schaffner, D. Sievenpiper, J. J. Lynch, R. Y. Loo, P. K. Park, "Reconfigurable Antenna for Multiple Band, Beam Switching Operation", U.S. Patent 6384797, May 7, 2002

D. Sievenpiper, H. P. Hsu, G. Tangonan, "Planar Antenna with Switched Beam Diversity for Interference Reduction in a Mobile Environment", U.S. Patent 6366254, April 2, 2002

D. Sievenpiper, R. J. Harvey, "Tunable-Impedance Spiral", U. S. Patent 6323826, November 27, 2001

E. Yablonovitch, D. Sievenpiper, "Circuit and Method for Eliminating Surface Currents on Metals", U. S. Patent 6262495, July 17, 2001

 

 

 

 

 

 

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