Title :
True-Time-Delay Beamforming With a Rotman-Lens for Ultrawideband Antenna Systems
Author :
Lambrecht, Andreas ; Beer, Stefan ; Zwick, Thomas
Author_Institution :
Inst. fur Hochfrequenztech. und Elektron., Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany
Abstract :
An analytical design model for Rotman-lenses is presented, with an accurate treatment of the return loss of the ports and their phase centers. The detailed design equations allow a very fast prototyping prior to numerical simulations for the final adjustment. Based on the presented model a prototype has been built for the true-time-delay phasing of an antenna array for the ultrawideband frequency range from 3.1 GHz - 10.6 GHz. Measurement results of the prototype together with an antenna array for transient systems are presented in the time and frequency domain.
Keywords :
array signal processing; frequency-domain analysis; microwave antenna arrays; numerical analysis; time-domain analysis; ultra wideband antennas; Rotman-lens; antenna array; frequency 3.1 GHz to 10.6 GHz; frequency domain analysis; numerical simulation; phase center; time domain analysis; true-time-delay beamforming; ultrawideband antenna system; Analytical models; Antenna arrays; Array signal processing; Equations; Frequency; Numerical simulation; Phased arrays; Prototypes; Ultra wideband antennas; Virtual prototyping; Antenna arrays; Rotman-lens; beam steering; phased arrays; true time delay; ultrawideband (UWB);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2052558
