Rapid leading edge step pulse generator

Abstract

The invention provides a rapid leading edge step pulse generator at least comprising one pulse signal generating circuit. The pulse signal generating circuit comprises a charging and discharging circuit, an avalanche transistor drive pulse forming circuit, a step recovery diode pulse forming circuit and a coupling circuit, wherein the charging and discharging circuit comprises a third charging and discharging capacitor C3, the avalanche transistor drive pulse forming circuit comprises an avalanche transistor Q2, the step recovery diode pulse forming circuit comprises a first step recovery diode D1, and the coupling circuit comprises a fifth coupling capacitor C5 and a sixth coupling capacitor C6. The rapid opening and closing features of a radio frequency transistor, the avalanche effect of the avalanche transistor, the step features of the step recovery diode and the like are utilized by the rapid leading edge step pulse generator for generating wide rapid leading edge step pulse signals, the leading edge is steep, the lagging edge is relatively slow, the lagging edge almost has no high-frequency overshoot, when the generator is connected with a transmitting antenna, high-frequency ringing cannot be introduced, and the shallow detection capability of the system is easily improved.

Description

Technical field [0001] The present invention relates to the field of electronic technology, in particular to a fast front step pulse generator. Background technique [0002] Ultra-wideband technology uses sub-nanosecond or picosecond narrow pulses as the transmission carrier, which has low power consumption, low cost, low power spectral density of transmitted signals, high range resolution, high concealment, strong penetration ability, and strong anti-interference Ability and other advantages can be effectively applied to many fields such as wireless communication, wireless sensor networks, ground penetrating radar, through-wall radar, radar positioning, tracking, penetration obstacle imaging, military field, security inspection, disaster search and rescue, etc. Among the key technologies of ultra-wideband technology, the development of narrow pulse signal generators has always been a technical issue that has attracted much attention in the field of ultra-wideband research. [000...

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Problems solved by technology

[0005] In the process of realizing the present invention, the applicant found that the signals output by the pulse generator in the prior art are mostly Gaussian pulse signals, and the main pulse rear end is inevitably followed by some overshoots, which are different from the actual dipole emission When the antennas are connected, there are defects such as large tails at the main pulse rear end and serious reflection oscillations, which affect the shallow detection capability of the ultra-wideband radar system

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