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(Color online) S-ring structure loaded with varactors.
(Color online) Transmission magnitude (inset) and phase advance for five unit cells of S ring loaded with different capacitive values.
(Color online) (a) Computational domain on the active radome; [(b), (c) and (d)] the near electric fields corresponding to the three cases at , the electric fields are recorded when the simulation reaches steady state.
Simulated radiation patterns at for three cases: (a) the S rings in each region are loaded with the same capacitors (case I), (b) the capacitive values in each region are listed in Table I (case II), and (c) the capacitive values in each region are list in Table I (case III).
Theoretical result of the radiation patterns at for three cases: (a) no phase difference along the aperture, (b) the phase is linearly changed from 0 to along the aperture, and (c) the phase is linearly changed from 0 to along the aperture.
Capacitive values and phase advances in each region.
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