A DIGITAL FERRITE PHASE SHIFTER. A STUDY OF THE DIFFERENTIAL PHASE SHIFT IN CIRCULAR CYLINDRICAL WAVEGUIDES CONTAINING CIRCUMFERENTIALLY MAGNETIZED FERRITE RODS AND TUBES UNDER TRANSVERSE ELECTRIC MODE EXCITATION

1964 ◽  
Author(s):  
D. M. Bolle ◽  
G. S. Heller
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Transverse Electric ◽  
Ferrite Phase ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Cylindrical Waveguides ◽  
Mode Excitation ◽  
Electric Mode ◽  
Transverse Electric Mode

Experimental investigation of the nonreciprocal phase shift of a transverse electric mode in a magneto-optic rib waveguide

1999 ◽  
Vol 74 (20) ◽  
pp. 2918-2920 ◽  
Author(s):  
M. Fehndrich ◽  
A. Josef ◽  
L. Wilkens ◽  
J. Kleine–Börger ◽  
N. Bahlmann ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Phase Shift ◽  
Transverse Electric ◽  
Rib Waveguide ◽  
Electric Mode ◽  
Transverse Electric Mode ◽  
Magneto Optic

scholarly journals Microwave Liquid Crystal Enabling Technology for Electronically Steerable Antennas in SATCOM and 5G Millimeter-Wave Systems

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 514 ◽  
Author(s):  
Rolf Jakoby ◽  
Alexander Gaebler ◽  
Christian Weickhmann
Keyword(s):  
Liquid Crystal ◽  
Phase Shift ◽  
Millimeter Wave ◽  
Phase Shifter ◽  
Beam Steering ◽  
Phase Shifters ◽  
Worst Case ◽  
Differential Phase Shift ◽  
Digital Architecture ◽  
Differential Phase

Future satellite platforms and 5G millimeter wave systems require Electronically Steerable Antennas (ESAs), which can be enabled by Microwave Liquid Crystal (MLC) technology. This paper reviews some fundamentals and the progress of microwave LCs concerning its performance metric, and it also reviews the MLC technology to deploy phase shifters in different topologies, starting from well-known toward innovative concepts with the newest results. Two of these phase shifter topologies are dedicated for implementation in array antennas: (1) wideband, high-performance metallic waveguide phase shifters to plug into a waveguide horn array for a relay satellite in geostationary orbit to track low Earth orbit satellites with maximum phase change rates of 5.1°/s to 45.4°/s, depending on the applied voltages, and (2) low-profile planar delay-line phase shifter stacks with very thin integrated MLC varactors for fast tuning, which are assembled into a multi-stack, flat-panel, beam-steering phased array, being able to scan the beam from −60° to +60° in about 10 ms. The loaded-line phase shifters have an insertion loss of about 3 dB at 30 GHz for a 400° differential phase shift and a figure-of-merit (FoM) > 120°/dB over a bandwidth of about 2.5 GHz. The critical switch-off response time to change the orientation of the microwave LCs from parallel to perpendicular with respect to the RF field (worst case), which corresponds to the time for 90 to 10% decay in the differential phase shift, is in the range of 30 ms for a LC layer height of about 4 µm. These MLC phase shifter stacks are fabricated in a standard Liquid Crystal Display (LCD) process for manufacturing low-cost large-scale ESAs, featuring single- and multiple-beam steering with very low power consumption, high linearity, and high power-handling capability. With a modular concept and hybrid analog/digital architecture, these smart antennas are flexible in size to meet the specific requirements for operating in satellite ground and user terminals, but also in 5G mm-wave systems.

Scattering by a semi-infinite resistive strip of dominant-mode propagation in an infinite rectangular wave-guide

1956 ◽  
Vol 52 (3) ◽  
pp. 553-563 ◽  
Author(s):  
V. M. Papadopoulos
Keyword(s):  
Electric Field ◽  
Digital Computer ◽  
Transverse Electric ◽  
Dominant Mode ◽  
Surface Resistivity ◽  
Wave Guide ◽  
Mode Propagation ◽  
Rectangular Wave ◽  
Electric Mode ◽  
Transverse Electric Mode

ABSTRACTThe scattering of the dominant transverse electric mode in an infinite perfectly conducting rectangular wave-guide by a semi-infinite resistive strip, centrally placed and parallel to the electric field, is calculated by the use of Laplace transforms. Formulae are derived for the amplitude of the scattered waves, and the numerical results, obtained using a digital computer, are given for various values of the surface resistivity of the strip.

scholarly journals 1310 nm differential-phase-shift QKD system using superconducting single-photon detectors

2009 ◽  
Vol 11 (4) ◽  
pp. 045020 ◽  
Author(s):  
Lijun Ma ◽  
S Nam ◽  
Hai Xu ◽  
B Baek ◽  
Tiejun Chang ◽  
...  
Keyword(s):  
Phase Shift ◽  
Single Photon ◽  
Photon Detectors ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Single Photon Detectors
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