Active Phased Antenna Calibration Based on Orthogonal Coding
- This presentation concerns the Control Circuit Encoding (CCE) technique used for calibrating digitally controlled phased arrays. The CCE method employs sets of orthogonal codes that are sequentially applied to all attenuators and phase-shifters in the beamformer, allowing elements to be measured in-situ simultaneously with a calibration probe in the far or near field of the array. In addition to calibrating commanded gain & phase settings the technique enables fast assessment of antenna array RMS gain & phase error, as well as fast and accurate measurement of in-situ element patterns and amplifier characteristics. The paper gives an overview of the theory and presents measured results performed on active phased array antennas.
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- Starts 10 September 2022 09:59 PM UTC
- Ends 15 September 2022 11:15 PM UTC
- No Admission Charge
Speakers
Erik Lier of Lockheed Martin Space
Active Phased Antenna Calibration Based on Orthogonal Coding
Biography:
Dr. Erik Lier received his M.Sc. and Ph.D. from the Norwegian University of Science and Technology, Trondheim, Norway. He started working as a university scientific assistant and later as a research scientist at the Electronics Laboratory (ELAB/SINTEF) at the university, carrying out national and international research on microwave antennas and feed components for the European Space Agency (ESA), INTELSAT, INMARSAT and other satellite organizations and radar companies. He spent a year at UCLA as a visiting scholar studying phased array antenna technology. He co-invented the concept of “Soft and Hard electromagnetic surfaces” which is related to the field of electromagnetic bandgap (EBG) structures and complex surfaces. Since 1990 he has been with Lockheed Martin Space, where he has been involved in developing new spacecraft antenna and payload technology. He was instrumental in building up shaped reflector capability in the company which resulted in winning the Asiasat-2 satellite program. He has been involved in the development and modernization of the GPS satellite payload for over more than 20 years. His main research interest and contribution has been in the field of phased array antennas, including design, analysis, system engineering, calibration and test. He was the phased array architect for two phased arrays launched into space. He headed up the internal metamaterials research collaboration effort within the company, which has included university collaboration and has led to several groundbreaking and practical metamaterial-enhanced antennas for space and ground applications. He is granted 36 US patents, has authored and co-authored over 140 journal and conference papers, including two papers in the journal Nature, co-authored one book and authored a book chapter. He received the 2014 IEEE Antennas and Propagation Harold A. Wheeler Applications Prize Paper Award. He is a Lockheed Martin Senior Technical Fellow, a Life Fellow of IEEE and a Fellow of IET.
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