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A software controllable modular RF signal generator with multichannel transmission capabilities.

Z Shaw1, W Feilner1, B Esser1

  • 1Center for Pulsed Power and Power Electronics, Texas Tech University, Lubbock, Texas 79409, USA.

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Summary

This study introduces a modular radio frequency (RF) signal generation and transmission system. The novel approach synthesizes signals by transmitting unique impulse patterns from each antenna, offering a new method for RF signal generation and potential encryption.

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Electromagnetics

Background:

  • Traditional phased arrays transmit identical signals with phase shifts.
  • Existing RF signal generation systems lack modularity and user-defined flexibility.

Purpose of the Study:

  • To present a software-controllable system for generating and transmitting user-defined RF signals.
  • To demonstrate a novel approach to RF signal synthesis using modular transmitting channels and distinct impulse patterns.

Main Methods:

  • Implementation of a modular system with replaceable components (amplifiers, antennas).
  • Utilizing a data pattern generator (DPG) and digital-to-analog converter (DAC) for signal generation.
  • Employing a master clock for synchronization across multiple transmitting channels.
  • Experimentation with two- and four-channel antenna arrays using Chebyshev tapered TEM horn antennas.

Main Results:

  • Successful synthesis of a specific frequency sinusoidal signal in free space.
  • Demonstration that each antenna radiates a distinct signal, unlike standard phased arrays.
  • Validation of the system's capability to generate user-defined RF signals.

Conclusions:

  • The developed system offers a flexible and modular platform for RF signal generation and transmission.
  • The novel method of transmitting distinct impulse patterns enables precise signal synthesis.
  • This approach presents potential applications in physical layer encryption due to its position-dependent nature.