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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

On-line version ISSN 2179-1074

Abstract

PEROTONI, Marcelo B.; SILVA, Samuel N. N.; SILVA, L. A. da  and  OLIVEIRA, Alexandre M. de. Transistor Avalanche Non-Coherent Pulse Generator. J. Microw. Optoelectron. Electromagn. Appl. [online]. 2020, vol.19, n.2, pp.242-251.  Epub June 08, 2020. ISSN 2179-1074.  https://doi.org/10.1590/2179-10742020v19i2836.

A transistor avalanche noise generator (TANG) is described. It is based on an off-the-shelf RF transistor with an integrated planar monopole. From a 70 V DC power it generates sub-nanosecond pulses with amplitudes close to 1 V. The proposed solution does not employ step recovery diodes, and it is based as the name implies on the operation of a bipolar transistor crossing into the avalanche region. Radiation measurements showed energies close to −40 dBm at frequencies near 600 MHz, with energies reaching the range of 1 GHz.

Keywords : Avalanche Breakdown; Pulse Circuits; Pulse Excited Antennas.

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