RF microwave circuit and pulse shaping method
A multi-port circuit and corresponding method for simultaneous shaping of sub-nanosecond pulses (MCS 3 P). The MCS 3 P includes a coupled-line coupler, a Schottky detector diode, and circuitry for compressing the rising and falling edges of a waveform. The MCS 3 P simultaneously produces square wave, Gaussian, and monocycle waveforms by differentiating a sinusoidal source. The method includes the steps of compressing the rising edge of a sinusoidal source waveform, differentiating the resulting waveform to form a square waveform and a Gaussian waveform, filtering out the positive going Gaussian to produce a negative going Gaussian, differentiating the Gaussian waveform to form a monocycle waveform, and compressing the falling edge of the square waveform to produce a square wave form with both edges compressed.
1. A pulse shaping circuit, comprising:
circuitry for compressing a rising edge of an input pulse;
a coupled-line differentiator connected to the rising edge compressing circuitry to differentiate the input pulse to form a square wave pulse, and a Gaussian pulse;
circuitry for compressing the falling edge of the square wave pulse connected to the coupled-line differentiator; and
a Schottky detector differentiator connected to the coupled-line differentiator to differentiate the Gaussian wave pulse to form a monocycle pulse.
2. A pulse shaping circuit, comprising:
circuitry for compressing a rising edge of an input pulse;
a coupled-line differentiator connected to the rising edge compressing circuitry to differentiate the input pulse to form a square wave pulse, and a Gaussian pulse;
circuitry for compressing the falling edge of the square wave pulse connected to the coupled-line differentiator;
a Schottky detector differentiator connected to the coupled-line differentiator to differentiate the Gaussian wave pulse to form a monocycle pulse; and
a clamping and filter circuit connected to the coupled line differentiator to filter out the positive or negative portion of the Gaussian wave pulse.
3. The pulse shaping circuit of claim 1 , wherein the input pulse is a sinusoidal pulse.
4. A method of simultaneously shaping pulses, comprising the steps of:
receiving an input periodic waveform pulse;
differentiating the input pulse to form a square wave pulse and a Gaussian pulse; and
differentiating the Gaussian pulse to form a monocycle pulse.
5. The method of claim 4 , further comprising the steps of:
compressing a rising edge of the input pulse; and
compressing a falling edge of the input pulse.
6. The method of claim 4 , wherein the input pulse is a sinusoidal pulse.
7. A method of simultaneously shaping pulses, comprising the steps of:
receiving an input periodic waveform pulse;
differentiating the input pulse to form a square wave pulse and a Gaussian pulse;
differentiating the Gaussian pulse to form a monocycle pulse;
outputting the square wave pulse;
selectively outputting the positive or negative amplitude portion of the Gaussian pulse; and
outputting the monocycle pulse.
8. A method of simultaneously shaping pulses, comprising the steps of:
receiving an input periodic waveform pulse;
differentiating the input pulse to form a square wave pulse and a Gaussian pulse;
differentiating the Gaussian pulse to form a monocycle pulse; and
filtering out the positive amplitude portion of the Gaussian pulse.