Pulse generating device and output adjustment method thereof

A pulse generating device configured to output an output of the modulator as a high frequency pulse, comprising:

• a high frequency oscillator configured to generate a carrier wave of a predetermined frequency;
• an output variable device configured to adjust an output of the high frequency oscillator;
• a power measuring unit configured to measure the output of the high frequency oscillator;
• a temperature measuring unit configured to measure an ambient temperature;
• a baseband pulse generating unit including a pulse generator configured to generate a pulse having a predetermined pulse width and a low pass filter configured to adjust a shape of a pulse output from the pulse generator, the baseband pulse generating unit generating a signal of a pulse shape;
• and
• a modulator configured to modulate the output of the high frequency oscillator with the signal of the pulse shape output from the baseband pulse generating unit,
• wherein, when the ambient temperature exceeds a first threshold value, the output variable device adjusts the output of the high frequency oscillator in accordance with a measurement result of the power measuring unit, and
• when the ambient temperature is the first threshold value or less, an output of the high frequency pulse is adjusted within a predetermined range by performing at least one of adjusting the output of the high frequency oscillator by the output variable device and modifying and adjusting a shape of the signal of the pulse shape by the baseband pulse generating unit in accordance with a measurement result of the temperature measuring unit.

An output adjustment method of a pulse generating device of an in-vehicle radar configured to modulate a carrier wave of a predetermined frequency with a signal of a pulse shape and output a resulting signal as a high frequency pulse including a main lobe and a side lobe, the output adjustment method comprising:

• a step of acquiring a power measurement value of the carrier wave;
• a step of acquiring a temperature measurement value of an ambient temperature;
• a step of adjusting an output of the carrier wave;
• and
• a step of modifying and adjusting a shape of the signal of the pulse shape,
• wherein, when the temperature measurement value is a first threshold value or less, at least one of a step of adjusting the output of the carrier wave so that the side lobe is a predetermined output or less and a step of modifying and adjusting the shape of the signal of the pulse shape is performed.

An output adjustment method used in a pulse generating device configured to modulate a carrier wave of a predetermined frequency with a signal of a pulse shape and output a resulting signal as a high frequency pulse, the output adjustment method comprising:

• a step of acquiring a power measurement value of the carrier wave;
• a step of acquiring a temperature measurement value of an ambient temperature;
• a step of adjusting an output of the carrier wave in accordance with the power measurement value;
• a step of adjusting the output of the carrier wave in accordance with the temperature measurement value;
• and
• a step of modifying and adjusting a shape of the signal of the pulse shape in accordance with the temperature measurement value,
• wherein, when the temperature measurement value exceeds a first threshold value, a step of adjusting the output of the carrier wave in accordance with the power measurement value is performed, and
• when the temperature measurement value is the first threshold value or less, the output of the high frequency pulse is adjusted within a predetermined range by performing at least one of a step of adjusting the output of the carrier wave and a step of modifying or adjusting a shape of the signal of the pulse shape in accordance with the temperature measurement value.