Okoniewski, Michal M.Nielsen, JorgenKeshavarzian, Pouyan2018-12-182018-12-182018-12-10Keshavarzian, P. (2018). An Active-Loaded Phase-Conjugating Rotman Lens for Intelligent Transportation System Backscattering Applications (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.http://hdl.handle.net/1880/109366Retro-directive backscattering is useful for improving link-budget in communication systems, localization and radar cross-section enhancement. Many existing technologies have limitations in terms of overall gain and scalability to higher frequencies. This thesis presents a new active retro-directive array architecture for Intelligent Transportation System applications such as automotive radar. The topology involves designing a phase-conjugating Rotman lens with reflection amplifiers for increased gain. Components of this architecture can be scaled to mm-wave. A reflection amplifier is prototyped and tested to have a maximum gain of 17.1 dB at 5.3 GHz. The circuit is then augmented onto a phase-conjugating Rotman lens. The amplifiers are tuned to ~ 6.5 dB gain at 5.15 GHz and the overall phase-conjugating performance is assessed. The active eleven element lens has a calculated backscattering gain of 19.2-25.4 dB across the scanning range of ±32 ˚ . Keywords: rotman lens, retro-directivity, phase-conjugation, ITSenUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.rotman lens, retro-directivity, phase-conjugation, ITSEducation--SciencesEducation--TechnologyEngineering--Electronics and Electricalmaster thesis10.11575/PRISM/34986