Realizing robust and stable two-way links between the mobile users and the satellite is an extremely challenging RF/Microwave engineering problem. Low cost and low pro le phased array is considered as the best solution for this problem. High performance low cost and miniaturized variable phase shifter is a key enabling technology for such complex smart phased array antenna system. This thesis a...

A nonlinear microwave phase shifter based on ferrite-ferroelectric composite material has been studied for the first time. The ferrite-ferroelectric composite is fabricated in the form of bilayer consisted of yttrium iron garnet and barium strontium titanate. A principle of operation of the device is based on the linear and nonlinear control of the phase shift of the hybrid spinelectromagnetic ...

Design and Implementation of Ultra-Wideband Passive High Frequency Phase Shifter with Single Layer Microstrip Structure

In a liberalized electricity market, the use of phase shifting transformers or other power flow controlling devices allows the transmission system operator to utilize the available grid infrastructure in a more optimal way. However, each phase shifter adds a degrees of freedom to the control problem, making optimization more difficult. In this paper, the coordination problem is solved by using ...

Introduction Phase shifter (PS) in a phased array antenna shifts phase of incoming RF signal depending on control input, enabling antenna main beam to be steered at a faster rate without rotating antenna mechanically. Demand for high performance WLAN system at low cost has necessitated development of a miniaturized PS with reduced loss at low cost. Design and development of various types of PSs...

The concept of a slow-wave MEMS tunable phase shifter that can be fabricated using the CMOS back-end and an additional maskless post-process etch is presented. The tunable phase shifter concept is formed by a conventional slow-wave transmission line. The metallic ribbons that form the patterned floating shield of this type of structure are released to allow motion when a control voltage is appl...

We propose and demonstrate a novel photonic phase shifter based on vector summation technique using polarization maintaining fibers (PMF). The phase change is achieved by controlling the modulator bias point and the polarization state of the signal injected into PMF. By controlling PMF length, 2π phase change is possible at microwave and millimeter wave frequencies.

Double vacuum channel phase-shifter enables longer interactions and increased velocities for terahertz waves.

We have developed a generalized cubic (GC) EOS for pure fluids, which incorporates non-analytic scaling laws in the critical region and in the limit ρ → 0 is transformed into the ideal gas equation EOS. The GC EOS contains 10 adjustable parameters and reproduces the thermodynamic properties of pure fluids with high accuracy, including the asymptotic scaling behavior of the isochoric heat capaci...