Opposite polarity pulse pair generator with increased pow-er using adder on suspended striplines

Authors: Shevchenko G. M., Pozdnyakov V. S., Semenov E. V., Berezin A. A.

Annotation: A pulse pair generator with a subnanosecond front is consid-ered, in which pulses of opposite polarity are created by sepa-rate generators, and then supplied to the bridge combiner of the original design (on suspended striplines). For the first time in devices of this type, an output power of 18 watts was achieved. A distinctive feature of this structure is that a half of the power of the generators is dissipated on the ballast resistor (due to the alternating appearance of pulses at the inputs of the combiner). To partially compensate for this effect, a half-standard (25 ohms) input resistance of the adder is selected. In the current circuit of generators it leads to an increase in power takeoff from them. The generators themselves are made on step recov-ery diodes (SRD) according to a scheme close to the traditional one, but differ by a diode circuit at the output, which eliminates penetration of parasitic lobes of a pulse of opposite polarity to the output and protects the SRD from the action of the pulse of the neighboring generator. The shaper is used in experiments to study nonlinear scattering.

Keywords: nonlinear radar, matched and isolated combiner, step recovery diodes