AN L-BAND DIGITAL PHASE SHIFTER

Abstract

a digitally controlled phase shifter was developed which has potential application to fixed array radar systems. The device is capable of producing shifts in phase in steps of 2-13/16 degrees from 0 to 360 degrees. The phase shifter, which operates throughout at 1200 mc, utilizes G.E. type 6299 uhf-shf triodes, and different lengths of strip transmission lines, in seven stages to produce 128 steps of phase shift. A phase-shift accuracy of 3 degrees was maintained at the center frequency with a power gain of 14 to 17 DB. A maximum phase error of !20 degrees was observed over a 10-mc bandwidth centered at 1200 mc. Within certain rather narrow limits of frequency, triode grid and plate voltages, rf drive power, and tube characteristics, the circuit is capable of giving excellent control of phase shift. Once the phase shifter is tuned, there is no measurable change in phase with time.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1962
Accession Number
AD0273631

Entities

People

  • W.a. Douglas
  • W.h. Harper

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Bandwidth
  • Circuits
  • Detectors
  • Frequency
  • Impedance
  • L Band
  • Measurement
  • Military Research
  • Phase Shift
  • Power Dividers
  • Radar
  • Radio Frequency Pulses
  • Resonant Circuits
  • Signal Generators
  • Strip Transmission Lines
  • Transmission Lines

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Microwave Engineering.
  • Radar Systems Engineering.