1. OFDM Frequency Scanning Radar (Patent, License it)
    U.S. Patent No.: 7,994,969, Filed: September 19, 2008, Issued: August 9, 2011

Patent Applications

  1. RF Power Combining and Division Through Electromechanical and Piezoelectric Transduction (License it)
    Belgian Patent Application No.: 20140066, Filed February 7, 2014
    In this patent application, radio frequency (RF) power combiner/divider implementations based on electromechanical or piezoelectric transduction, are claimed. Rather than summing or subtracting voltages across nodes and/or currents through branches in the electrical energy domain, the summing or subtracting of forces (pressures) on masses and mass velocities in the mechanical (acoustic) energy domain is proposed, after electromechanical or piezoelectric transduction of the electrical signal. In the acoustic energy domain, the quality (Q) factors can be 100 times higher than in the electrical energy domain, enabling low-loss power combining/division, as well as high-order (5th order and higher) band-pass filtering, at once. Although this idea seems far-fetched, it should be noted that surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices are used in virtually every smart phone in order to enable low-loss high-order band-pass filtering and duplexing. In this patent application, the use of SAW and BAW devices1, or any other electromechanical or piezoelectric transducer for that matter, to implement power combining/division is claimed. It is envisioned that due to improvements in thin film deposition techniques of piezoelectric materials, these power combiners/dividers as well as the high-order band-pass filters can be integrated on-chip - i.e. on the complementary metal oxide semiconductor (CMOS) die. A CMOS power amplifier represents a use case with economic relevance for the disclosed power combiner/divider implementation, in which the electrical signal at the output terminal of each and every transistor of its power bar is transduced from the electrical energy domain to the acoustic energy domain, is combined and bandpass filtered in the acoustic energy domain, and is transduced back to the electrical energy domain.
    Status: Abandoned after negative search report by EPO, citing JPS60160719A and US2013/0106531

Recent Publications

  1. An Analog RF MEMS Slotline True-Time-Delay Phase Shifter (Paper)
    Van Caekenberghe, K.; Vähä-Heikkilä, T.;
    IEEE Transactions on Microwave Theory and Techniques
    Volume 56, Issue 9, September 2008 Page(s): 2151 - 2159

  2. RF MEMS on the Radar (Paper)
    Van Caekenberghe, K.
    IEEE Microwave Magazine
    Volume 10, Issue 6, October 2009 Page(s): 99 - 116

  3. A 3-14.5 GHz 0.15 μm InGaAs pHEMT Low Noise Pseudo-Differential Distributed Amplifier (Paper)
    Proc. of the European Microwave Week Conference, Paris, France, October 2010

  4. Modeling RF MEMS Devices (Paper)
    Van Caekenberghe, K.
    IEEE Microwave Magazine
    Volume 13, Issue 1, January - February 2012 Page(s): 83 - 110

  5. A W-Band Waveguide Fabricated Using Selective Laser Melting (Paper)
    Van Caekenberghe, K.; Bleys, P.; Craeghs, T.; Pelk, M.; Van Bael, S.
    Wiley Microwave and Optical Technology Letters
    Volume 54, Issue 11, November 2012 Page(s) 2572 - 2575

Short Courses & Tutorials

  1. RF MEMS for Radar (Presentation)
    Presented at the IEEE Radar Conference, Washington D.C., May 2010

  2. Electronically Scanned Reflectarrays (Presentation)
    Presented at the European Conference on Antennas and Propagation (EuCAP), Rome, Italy, April 2011

  3. Compact Modeling of Resonators and Oscillators using Verilog-A (Presentation)
    Presented at the IEEE International Frequency Control Symposium (IFCS), Baltimore, MD, May 2012