Ultra-wideband impulse generation and modulation circuit
First Claim
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1. A modulated ultra wideband pulse generation system, comprising:
- a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse;
an antenna; and
a capacitor placed between the antenna and the modulating circuit.
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Abstract
A modulated ultra wideband pulse generation system is provided. The system comprises a pulse waveform generator circuit operable to generate an on-off pulse waveform, and a modulating circuit operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal. Further embodiments of the invention comprise a variable bandwidth circuit operable to alter the bandwidth of the pulses comprising the on-off pulse waveform. Various embodiments of the invention comprise on-off keying modulation, pulse position modulation, and pulse phase modulation.
32 Citations
12 Claims
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1. A modulated ultra wideband pulse generation system, comprising:
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a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse;
an antenna; and
a capacitor placed between the antenna and the modulating circuit.
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2. A modulated ultra wideband pulse generation system, comprising:
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a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse, wherein the pulse waveform generator circuit generates a pseudorandom waveform.
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3. A modulated ultra wideband pulse generation system, comprising:
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a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse; and
a variable bandwidth circuit operable to change the bandwidth of the ultra wideband pulse. - View Dependent Claims (4, 5)
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6. A modulated ultra wideband pulse generation system, comprising:
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a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse;
wherein the modulating circuit comprises a pulse position modulator operable to selectively delay the on-off pulse waveform in response to a modulating signal, the pulse position modulator comprising a resistor—
capacitor lowpass filter having a time constant that is varied in response to the modulating signal, operable to selectively delay the pulse position in response to the modulating signal.
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7. A modulated ultra wideband pulse generation system, comprising:
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a pulse waveform generator circuit operable to generate an on-off pulse waveform;
a modulating circuit, operable to receive a modulating signal and to modulate the on-off pulse waveform in response to the modulating signal to produce an ultrawideband radio frequency pulse;
wherein the modulating circuit comprises a phase modulator operable to selectively change the phase of the waveform in response to a modulating signal, wherein the phase modulator comprises an exclusive or (XOR) gate having the on-off pulse waveform as one input, a modulating signal as a second input, and a modulated signal as an output.
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8. A method of producing a modulated ultra wideband pulse, comprising:
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generating an on-off pulse waveform;
modulating the on-off pulse waveform in response to a received modulating signal to produce a modulated ultrawideband radio frequency pulse; and
,wherein the generated on off pulse waveform comprises a random or pseudorandom stream of on-off pulses.
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9. A method of producing a modulated ultra wideband pulse, comprising:
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generating an on-off pulse waveform;
modulating the on-off pulse waveform in response to a received modulating signal to produce a modulated ultrawideband radio frequency pulse; and
changing the bandwidth of the on-off pulse waveform via a variable bandwidth circuit. - View Dependent Claims (10)
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11. A method of producing a modulated ultra wideband pulse, comprising:
generating an on-off pulse waveform; and
modulating the on-off pulse waveform in response to a received modulating signal to produce a modulated ultrawideband radio frequency pulse, wherein modulating the on-off pulse waveform comprises modulating the pulse position such that the pulse position is selectively delayed in response to a modulating signal, and wherein the pulse position is modulated via a resistor—
capacitor lowpass filter having a time constant that is varied in response to the modulating signal, operable to selectively delay the pulse position in response to the modulating signal.
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12. A method of producing a modulated ultra wideband pulse, comprising:
generating an on-off pulse waveform; and
modulating the on-off pulse waveform in response to a received modulating signal to produce a modulated ultrawideband radio frequency pulse, wherein modulating the on-off waveform comprises phase modulation of the waveform such that the phase of the waveform is selectively changed in response to a modulating signal wherein the phase modulation is performed via a circuit comprising an exclusive or (XOR) gate having the on-off pulse waveform as one input, a modulating signal as a second input, and a modulated signal as an output.
Specification