The paper proposes and investigates the topology of a phase shifter based on directional coupler. dimensions such device are reduced by using artificial transmission lines instead quarter-wave sections. By connecting several pairs phase-shifting cells usual one, it was possible to obtain design with two shifts (instead one).

—The paper introduces a frequency independent phase shifting technique suitable for RADAR, satellite and wireless telecommunications applications. The proposed phased array transmitter achieves a high degree of precision along with an arbitrary small phase step value. The theory governing the design of the phase shifter is thoroughly discussed and three prototypes operating in different bands r...

Fast rf phase shifters may be needed, in powering a superconducting linac, between rf generators and accelerating cavities when one klystron feeds more than one cavity. The configuration with one klystron for many cavities needs orthogonal controls of magnitude and phase of rf power in order to preserve system performance while reducing construction cost. For this reason, a waveguide ferrite ph...

This paper describes some practical methods to calibrate the phase shifter in phase-shifting interferometry (PSI). The phase shifter used in the experiment is a piezoelectric transducer (PZT) that has a nonlinearity of <l%. Using the quantitative method described in this paper, the repeatability in the measurement of the phase-shifting angle is ̃9.046 rms, and the 3σ value is 0.139. A calibratio...

A Ku band six-bit phase shifter is presented in this work. The developed phase shifter consists of four bits realized as periodically loaded-line and two bits based on novel switched-line with loaded-line. A 71Ω line impedance is chosen for the main transmission line in order to reduce the diode loss. Every bit has special tuning elements for the fine tuning of the required phase shift. The pha...

This paper describes the design and fabrication of distributed analog phase-shifter circuits. The phase shifters consist of coplanar-waveguide (CPW) lines that are periodically loaded with varactor diodes. The circuits are fabricated on GaAs using standard monolithic processing techniques. The phase velocity on these varactor diode-loaded CPW lines is a function of applied reverse bias, thus re...

The new phase-shifter configuration described in this report uses a negative group delay (NGD) active circuit. In this topology, a classical transmission line is set in cascade with an NGD circuit whose phase slopes are alike, but opposite, to get a constant and broadband phase shift. The proposed approach was validated through the design and measurement of a phase shifter, which exhibited a co...

This paper presents an approach to the design and optimization of a new type millimeter-wave micro-electromechanical system (MEMS) phase shifter, using a genetic algorithm. Initial results show that a MEMS phase shifter with 32 30μmwidth bridges spaced at 300μm (total length = 10.56mm) can achieve 120°/dB at 35GHz and 148.5°/dB at 60GHz. Further work will be done on more complicated MEMS struct...

A broadband microwave photonic phase shifter based on a single III-V microdisk resonator heterogeneously integrated on and coupled to a nanophotonic silicon-on-insulator waveguide is reported. The phase shift tunability is accomplished by modifying the effective index through carrier injection. A comprehensive semi-analytical model aiming at predicting its behavior is formulated and confirmed b...