RF Cancellation Circuit for Shore-Based VHF FM Transceiver.

Abstract

The purpose of this research and development program was to develop an optimized method of removing unwanted transmitted signals from the receiver path in a typical Coast Guard VHF FM transceiver station. The circuit developed allows continuous monitoring of the guard channel (Ch. 16, 156.8 MHz) with minimum background interference levels while transmissions are occurring from the same antenna on adjacent channels spaced as close as 150 kHz. The six-month program was divided into four phases: (1) Components and Circuit Technique Identification and Analysis; (2) Performance Evaluation of Candidate Components and Circuit Techniques; (3) System Field Tests; and (4) Specification and Documentation of Program Results.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 13, 1978
Accession Number
ADA049683

Entities

People

  • T. A. Millington
  • W. G. Guion

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acceptance Tests
  • Attenuation
  • Bandpass Filters
  • Circuits
  • Coast Guard
  • Crystal Filters
  • Delay Lines
  • Diagrams
  • Field Tests
  • Filters
  • Frequency
  • Impedance
  • Insertion Loss
  • Power Dividers
  • Radio Frequency Circulators
  • Test And Evaluation
  • Transmitters

Fields of Study

  • Engineering

Readers

  • Life Cycle Cost Analysis
  • Radio communications and signal processing.
  • Systems Analysis and Design

Technology Areas

  • Space