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Title: Digitally controlled distributed phase shifter

Abstract

A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one or two discrete bias voltages. The application of the discrete bias voltages changes the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

Inventors:
 [1];  [1];  [2]
+ Show Inventor Affiliations
  1. Placitas, NM
  2. Albuquerque, NM
Issue Date:
Research Org.:
AT&T
OSTI Identifier:
868892
Patent Number(s):
5237629
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01P - WAVEGUIDES
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DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
digitally; controlled; distributed; phase; shifter; comprised; shifters; digital; control; achieved; binary; length-weighted; electrodes; located; top; surface; waveguide; terminal; attached; electrode; allowing; application; signal; discrete; bias; voltages; changes; modal; index; portion; corresponds; length; voltage; applied; causing; change; underlying; shift; network; total; individual; electrodes located; top surface; phase shift; control signal; bias voltage; phase shifter; phase shifters; digital control; distributed phase; dual phase; digitally controlled; controlled distributed; individual phase; /385/333/

Citation Formats

Hietala, Vincent M, Kravitz, Stanley H, and Vawter, Gregory A. Digitally controlled distributed phase shifter. United States: N. p., 1993. Web.
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Hietala, Vincent M, Kravitz, Stanley H, & Vawter, Gregory A. Digitally controlled distributed phase shifter. United States.
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Hietala, Vincent M, Kravitz, Stanley H, and Vawter, Gregory A. Fri . "Digitally controlled distributed phase shifter". United States. https://www.osti.gov/servlets/purl/868892.
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@article{osti_868892,
title = {Digitally controlled distributed phase shifter},
author = {Hietala, Vincent M and Kravitz, Stanley H and Vawter, Gregory A},
abstractNote = {A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one or two discrete bias voltages. The application of the discrete bias voltages changes the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}
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Works referenced in this record:

Analysis of depletion edge translation lightwave modulators
journal, June 1988

Broadband continuously variable microwave phase shifter employing a distributed Schottky contact on silicon
journal, January 1987

Voltage variable microwave phase shifter
journal, January 1985

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