Doppler radar sensor with bondwire interconnection
AssigneesSil Radar Technology Inc., National Cheng Kung University, NCKU Research and Development Foundation
InventorsHuey-Ru Chuang, Cheng-Hsueh Chan, Chien-Chang Chou
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Abstract
A Doppler radar sensor includes a radar and a bondwire interconnection. The bondwire interconnection is connected to a signal generator and an antenna of the radar and configured to transmit a radio frequency signal generated by the signal generator to the antenna and transmit a reflected signal received by the antenna to a demodulator of the radar. A metal strip, a first shunt bondwire and a second shunt bondwire of the bondwire interconnection can be used as a matching circuit of the antenna to decrease the transmission loss and increase the detection distance of the radar.
Claims12
A Doppler radar sensor, comprising:
- a radar including a signal generator, an antenna and a demodulator, the signal generator is configured to generate a radio frequency signal, the antenna is configured to receive and radiate the radio frequency signal as a wireless signal to an object and further configured to receive a reflected signal from the object, the demodulator is coupled to the signal generator and the antenna and configured to receive the radio frequency signal and the reflected signal, the demodulator is configured to demodulate the reflected signal by using the radio frequency signal as a reference signal to obtain a displacement signal;
- and
- a bondwire interconnection coupled to the antenna and the signal generator, the antenna is coupled to the signal generator via the bondwire interconnection, wherein the bondwire interconnection includes a first metal strip, a first shunt bondwire, a second shunt bondwire, a second metal strip, a third shunt bondwire, a third metal strip and a fourth shunt bondwire, two ends of the first shunt bondwire are coupled to the signal generator and the first metal strip, respectively, two ends of the second shunt bondwire are coupled to the first metal strip and the antenna, respectively, two ends of the third shunt bondwire are coupled to the second metal strip and a ground end of the radar, respectively, and two ends of the fourth shunt bondwire are coupled to the third metal strip and the ground end of the radar, respectively.
A Doppler radar sensor, comprising:
- a radar including a signal generator, an antenna and a demodulator, the signal generator is configured to generate a radio frequency signal, the antenna is configured to receive and radiate the radio frequency signal as a wireless signal to an object and further configured to receive a reflected signal from the object, the demodulator is coupled to the signal generator and the antenna and configured to receive the radio frequency signal and the reflected signal, the demodulator is configured to demodulate the reflected signal by using the radio frequency signal as a reference signal to obtain a displacement signal;
- and
- a bondwire interconnection coupled to the antenna and the signal generator, the antenna is coupled to the signal generator via the bondwire interconnection, wherein the bondwire interconnection includes a first metal strip, a first shunt bondwire and a second shunt bondwire, two ends of the first shunt bondwire are coupled to the signal generator and the first metal strip, respectively, and two ends of the second shunt bondwire are coupled to the first metal strip and the antenna, respectively;
- wherein the radar further includes a first power divider and a circulator, the first power divider is electrically connected to the signal generator and configured to receive and divide the radio frequency signal into two paths, the circulator is electrically connected to the first power divider and the bondwire interconnection and configured to receive the radio frequency signal of one path from the first power divider and transmit the radio frequency signal to the bondwire interconnection, the reflected signal received by the antenna is transmitted to the circulator.
Dependencies are inferred from the claim text.