One of those devices, called a phase shifter, is needed to electronically steer the beam of a so-called phased-array radar system.
" Soliton-guided phase shifter and beam splitter", K. Steiglitz, Phys.
Harris, N. C. et al. Efficient, compact and low loss thermo-optic phase shifter in silicon.
The designed phase shifter consists of 56 same sections.
J. R. Ragazzini and L. A. Zadeh, "Precision calibrated phase shifter," U.S. Patent 2,749,502.
First, a high-speed, low-loss, and chirp-free optical phase shifter is demonstrated.
At each radiating element of the active-aperture phased-array is an individual transmitter, receiver, phase shifter, duplexer, and control.
Each active element is a module with its own solid-state transmitter, receiver, duplexer, and phase shifter.
For verification of this wideband phase shifter design method, two phase shifter example with rectangular and elliptical load termination is fabricated and measured.
The phase shifter showed −0.19 polarizance and 0.4% transmittance for 90° retardation.
In this paper, a 12 GHz tunable phase shifter is analyzed, designed, simulated and prototyped.
