Resistance power-differential type signal antenna radar front end
A radar front-end and power division technology, which is applied in the radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problems of not being able to adapt to mass production, small applicability, poor stability, etc., and achieve the finished product Good efficiency and consistency, improved performance, and reduced volume
Inactive Publication Date: 2007-07-11
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a resistance power-divided single-antenna radar front-end with good stability and suitable for various automotive radars, so as to overcome the defects of poor stability and small applicability in the prior art.
[0005] Another problem to be solved by the present invention is to improve the defects of poor stability, large volume and inability to adapt to mass production in the existing radar front-end transceiver components, and to provide a transceiver component with small volume, high yield, good stability and low cost. Low resistive power-divided single-antenna radar front-end suitable for high-volume production
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[0017] Further illustrate the present invention below in conjunction with accompanying drawing.
[0018] As shown in the block diagram of the radar front-end system in Fig. 1, the resistance-divided power type single-antenna radar front-end of the present invention includes a transmitting antenna, a receiving antenna and a circuit part, and the circuit part is a transceiver component, which is connected with an intermediate frequency signal processing system, and is characterized in that , the transceiver components include a voltage-controlled oscillator, a circulator, a resistor, a drive amplifier, and a mixer; the voltage-controlled oscillator, the circulator, and the transmitting antenna are used as the transmitting branch; the receiving antenna, the circulator, and the mixer are used as the receiving branch ;Resistors and drive amplifiers are used as local oscillator branches;
[0019] The transmission signal output by the voltage-controlled oscillator, a small part of th...
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The resistance sub power single antenna radar front comprises the emitting antenna, receiving antenna and circuit, with the circuit being the receiving component connected with middle frequency signal handling system, composed of voltage-controlled oscillator, circulator, resistance, drive amplifier, and frequency mixer, the voltage controlled oscillator sending out signals, a small portion of which being distributed by the resistance, amplified by drive amplifier, sending to the frequency mixer through local oscillator signal, with most of the signal being emitting signal through the circulator to the emission antenna, echo-signal entered into frequency mixer and mixed with local oscillator signal, generating middle frequency singal, which is being amplified and filtered and delivered to middle frequency handling system. It cans flexibly adjusting the emission power and volume of the local oscillator power, acquiring the best performance, with good stability, suitable for radars of all kinds of vehicles.
Description
technical field [0001] The invention relates to a signal acquisition part of an automobile radar, in particular to a resistance-divided-power type single-antenna radar front end, which is suitable for the application of various automobile radars. The invention conforms to the system design technology in the field of microwave radar. Background technique: [0002] The radar emits electromagnetic waves through the transmitter, and the electromagnetic waves are received and processed by the receiver after being reflected by the object, and the distance and speed information of the object is extracted. Radar is of great value in both military and civilian use. Automobile collision avoidance radar and traffic detection radar are the main applications of radar in automobiles. [0003] In recent years, automotive millimeter-wave radar technology has developed rapidly, requiring millimeter-wave transceiver components to have the characteristics of small size, low cost, and good sta...
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IPC IPC(8): G01S7/28G01S13/08G01S13/93
Inventor 王闯孙晓玮钱蓉孙芸沈秀英喻筱静顾建忠李凌云余稳
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI