Millimeter wave radar refers to a radar that operates in the millimeter wave band. The radar is used to transmit radio to the surroundings, and the distance, direction and size of the obstacle are calculated by measuring and analyzing the reflected waves. Typical applications include automotive anti-collision radar, helicopter anti-control radar and precision tracking radar. The latest automotive millimeter-wave radar can identify cars and pedestrians.
Automotive millimeter wave radar chip solutionThe following describes an automotive millimeter wave radar solution based on UMS's 24GHz integrated transceiver chip.
The 24GHz automotive millimeter wave radar solution is mainly composed of 24GHz RF transceiver chip, control unit and CAN bus interface. The 24GHz RF transceiver chip realizes the generation, transmission and reception of millimeter wave signals. The control unit uses the algorithm to realize the function of ranging and speed measurement. CAN The bus interface is responsible for communicating with other parts of the car. The following is a basic block diagram of a 24 GHz automotive millimeter wave radar:
Figure 1: Basic block diagram of a 24 GHz automotive millimeter wave radar
Based on this solution, the application of vehicle collision avoidance radar such as blind spot detection (BSD), lane change assist (LCA)/offset warning (LDW), and adaptive cruise control (ACC) can be realized. In addition, it can also realize the application of ranging and speed-measuring radar in the fields of intelligent traffic speed measurement, security, industrial control and so on.
The core component of the solution is the industry's only 24GHz integrated transceiver chip CHC2442 with GaAs technology. The following are the main features of the device:
• Transmitting power 13.5dBm
• Transmit gain control range 12dB
• Receive gain of 37dB
• Receive gain control range of 24dB
• Noise figure 11dB (intermediate frequency is greater than 100KHz, maximum RF gain)
• Input 1dB compression point -16dBm
• VCO phase noise -90dBc/Hz@100KHz
• Temperature range -40°C to 125°C
• Operating voltage 3.3V
• Package QFN4*5 to meet RoHS standards
UMS's 24GHz radar transceiver chip is the best choice for 24GHz automotive millimeter wave radar solutions with its automotive-grade operating temperature range, greater transmit power, and excellent VCO output phase noise.
24G microwave frequency VCO solutionFor the 24 GHz automotive millimeter wave radar system, UMS introduced the voltage controlled oscillator (VCO) product CHV2421-QDG for discrete systems. The device is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO. The CHV2421-QDG integrates a resonator, a negative resistance device, a varactor diode and a prescaler.
The following is a functional block diagram of the CHV2421-QDG. It can be seen from the figure that the VCO can generate 24 GHz microwave frequencies with two divided outputs up to 15 dBm.
Figure 1: Functional Block Diagram of CHV2421
Product features of CHV2421:
• Frequency range 24-24.5GHz
• Typical output power 15dBm
• Output dynamic range 13dB
• Phase noise -90dBc/Hz
• Non-resonant transmit clutter suppression 80dBc
• Prescaler transmit clutter suppression 55dBc
• Operating voltage 5V
• Operating temperature -40 ° C ~ 105 ° C
• Tuning voltage 0.5-5.5V
• Pre-divided output power 0dBm
• Lead-free soldering in 24L-QFN package
• Meet the MSL1 standard
Aluminum Electrolytic Capacitors
Aluminum Electrolytic Capacitors
Large Electrolytic Capacitor,HV Electrolytic Capacitors,Aluminum Electrolytic Capacitors
YANGZHOU POSITIONING TECH CO., LTD. , https://www.yzpst.com