ANTENNAS INTEGRATED WITH TRANSISTORS AND VARACTOR DIODES.

Abstract

Part 1 deals with transistorized receiving antennas. Definitions of gain, directivity, effective area, noise temperature, noise figure, and sensitivity are given. Active and passive antennas are compared concerning their noise behaviour. The difference between noise match and power match is described. Definitions and measuring methods for bandwidth, selectivity, intermodulation, and crossmodulation in active antennas are given. Part 2 deals with transistorized transmitting antennas. Transistor power gain and power match to the antenna are discussed. Measurements of the radiation of harmonics are described. Part 3 deals with tunable antennas. Examples of antennas tuned with transistors below 30 MHz and tuned with varactor diodes at Frequencies abov 30 MHz are given. Part 4 shows a semidirective antenna with adjustable pattern for vertical and horizontal scanning. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1968
Accession Number
AD0687189

Entities

People

  • H. H. Meinke

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandwidth
  • Diodes
  • Frequency
  • Gain
  • Harmonics
  • Intermodulation
  • Measurement
  • Power Gain
  • Radiation
  • Scanning
  • Sensitivity
  • Transistors
  • Transmitting
  • Varactor Diodes

Fields of Study

  • Engineering

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Electronics Engineering
  • Theoretical Analysis.