Quasi-Optical Transponder Using FETs and Patch Antennas

Abstract

Quasi-optical planar transponder that integrates a self-oscillating mixer, an IF amplifier and two patch antennas, one for receiving RF signal (14GHz) and another for transmitting amplified IF signal (8GHz) is presented. The prototype circuit is designed in microstrip structure and fabricated on a single substrate. As an active source, GaAs FET is selected. Self-oscillating (6GHz) mixer with patch antenna in receiver front end is developed based on quasi-optical technique. To obtain enough power level of IF signal before it is transmitted, the amplifier is designed with bandpass filter which blocks undesirable mixing products except 8GHz. This prototype of transponder, which is compact and selfcontained unit as a single entity has many applications in microwave and millimeter-wave area. Transponder, Quasi-optical technique, Self- oscillating mixer, Active antenna.

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Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1993
Accession Number
ADA271339

Entities

People

  • Kimin Cha
  • Tatsuo Itoh

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amplifiers
  • Bandpass Filters
  • Circuit Boards
  • Classification
  • Communication Systems
  • Elements
  • Field Effect Transistors
  • Frequency
  • Global Positioning Systems
  • Impedance
  • Local Oscillators
  • Millimeter Waves
  • Power Spectra
  • Semiconductors
  • Transistor Amplifiers
  • Transistors
  • Transmission Lines

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Phased Array Antenna Design.

Technology Areas

  • 5G
  • Microelectronics