This paper presents a 500-600 GHz submillimeterwave MEMS-reconfigurable phase shifter. It is the first ever RF MEMS component reported to be operating above 220 GHz. The phase shifter is based on a micromachined rectangular waveguide which is loaded by 9 E-plane stubs, which can be individually blocked by using MEMS–reconfigurable surfaces. The phase-shifter is composed of three metallized sili...

This paper explores an idea to extend Newton–Raphson power flow problem to handle power system transmission line flow limits, by means of generation redispatch and phase shifters. We extend and reformulate the power flow so that it includes a variety of flow limits (thermal, small-signal stability, voltage difference), generation redispatch, and phase shifters. The novelty of the approach is th...

A dual-band vector-sum phase shifter with independent control of the 2.4 and 5 GHz Wi-Fi bands is presented. The network uses band-limited variable gain amplification, a broadband hybrid coupler at input an in-phase recombiner output. circuit prototyped on RF printed board exhibits performance characteristics comparable to state-of-the-art single band shifters. prototype achieved average 2.16 d...

This article presents an equivalent electrical circuit for designing Radio-Frequency MEMS-controlled planar phase shifter. This kind of phase shifters has recently been incorporated in reconfigurable reflectarrays. The proposed equivalent circuit depends on the number, the ON/OFF state and the locations of the switches inside the unit cell. Such equivalent circuit is used for determining, with ...

In traditional interference lithography, interference fringes are typically phase locked to a stationary substrate using analog homodyne photodiode signals that are fed back to control a phase-shifting device such as an electro-optic modulator or a piezoelectrically transduced mirror. Commercially available fringe-locking systems based on this approach often achieve stability of the interferenc...

A linear phased array antenna excited with a novel composite right/left-handed (CRLH) phase shifters structure is proposed. The of the conventional CRLH transmission line controlled magnetically aligned micron-sized particles embedded inside unit cell line. cascading cells produces desired shifts for main beam scanning operating at 5.5 GHz center frequency Wi-Fi 6 applications. proposed shifter...

Abstract—We propose a branch flow model for the analysis and optimization of mesh as well as radial networks. The model leads to a new approach to solving optimal power flow (OPF) that consists of two relaxation steps. The first step eliminates the voltage and current angles and the second step approximates the resulting problem by a conic program that can be solved efficiently. For radial netw...