AWR White Papers

Design and Physical Realization of Phased Array Antennas for MIMO/Beam Steering Applications

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WHITE PAPER Design and Physical Realization of Phased Array Antennas for MIMO/Beam Steering Applications Featuring AWR Software A phased array antenna is made up of multiple individual radiating elements (antennas), each fed with an RF signal controlled through phase shifters in such a way that the radio waves from the separate antennas are added together to increase the radiation. This forms a beam pointing in a desired direction, while at the same time suppressing radiation in undesired directions. The benefits of phased array systems over omni-directional antennas include higher directivity, fast electronic steering (beams that can be redirected in milliseconds), and the ability to emit multiple beams simultaneously for multifunctional operations. Radar attributes for phased arrays include shaped-antenna patterns and beam control (including adaptive interference cancellation), dynamic range, in-band linearity, system-phase noise, and angle-measurement accuracy. Contents Design Overview ....................................................................................2 Why Phased Arrays ...............................................................................3 Antenna Elements and Design Parameters...................................5 Antenna Geometries, Synthesis, and Physical Realization ......6 Configuring Phased Array Antennas ............................................... 7 Feed Networks .......................................................................................8 Generating Designs from the Wizard .............................................10 Conclusion ............................................................................................. 12

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