Devices selection for the construction of a microwave transmission link at 2.45 GHz

  • Authors:

  • E. Zirintsis;C. Pavlatos;C. A. Christodoulou;V. M. Mladenov

  • Affiliations:

  • IT Faculty, Hellenic American University, Athens, Greece;IT Faculty, Hellenic American University, Athens, Greece;School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece;Department of Theoretical Electrical Engineering, Technical University of Sofia, Sofia, Bulgaria

  • Venue:
  • CSECS'09 Proceedings of the 8th WSEAS International Conference on Circuits, systems, electronics, control & signal processing
  • Year:
  • 2009

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Abstract

Today's communication systems allow voice and data to be transmitted using both digital and analogue transmission. Principles of analogue transmission are demonstrated using double sideband with carrier (DSBC) amplitude modulation (AM). A complete transmitting and receiving system is constructed, including a voltage controlled oscillator (VCO), a modulator, three amplifiers, two filters and a detector, at microwave frequency, and a audio and power amplifier for the low frequency signal. Two antennas were also constructed. The carrier frequency was selected to be 2.45 GHz and the transmitted information had a bandwidth of a few kHz (voice).