RF Beam Control

  • Wodek Gawronski
Part of the Mechanical Engineering Series book series (MES)

This chapter discusses the detection and control of the position of the radio frequency (RF) beam. The position of the beam is slightly different from the antenna position as measured by the encoders. This happens due to structural deformations caused either by loads (e.g., gravity, wind) or by the temperature gradient, atmospheric distortion, or azimuth track unevenness. We also discuss how the beam position is detected and controlled to minimize pointing error.

First, the RF controller to be used in the RF control is selected. Next, the monopulse detection and control technique are analyzed, showing its performance in its linear and nonlinear models. Finally, the scanning techniques, such as conical scan, Lissajous, rosette, and sliding window conical scan are discussed.

Selecting the RF Beam Controller

In this section, based on [ 9], the RF beam position controller (RF controller, for short) is selected. The RF feedback loop is closed over the antenna position loop (see the block...


Radio Frequency Power Variation Wind Gust Spacecraft Position Position Controller 
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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Wodek Gawronski
    • 1
  1. 1.California Institute of TechnologyJet Propulsion LaboratoryPasedenaUSA

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