Millimeter Wave Multi-Port Interferometric Radar Sensors: Evolution of Fabrication and Characterization Technologies

Area of Science:

• Electrical Engineering
• Applied Physics
• Microwave Engineering

Background:

• Millimeter wave (mmWave) technologies have seen substantial progress in component and system design.
• Significant reductions in size and cost have broadened mmWave applications in high-speed wireless communications, radar, and imaging.

Purpose of the Study:

• To present the historical evolution of millimeter wave circuit and module fabrication and characterization technologies.
• To highlight the development of novel planar, low-cost fabrication methods.
• To demonstrate opportunities for prototyping future mmWave transceivers and front-ends.

Main Methods:

• Review of past decades' fabrication and characterization technologies for mmWave circuits and modules.
• Development and integration of novel planar low-cost fabrication technologies with standard waveguide technology.
• Case study on the evolution of multi-port interferometric front-ends from bulky to miniaturized systems.

Main Results:

• Successful development of novel planar, low-cost fabrication technologies.
• Integration of advanced components like antenna arrays, down-converters, and amplifiers into compact fixtures.
• Demonstration of miniaturized and high-efficiency multi-port interferometric front-ends.
• Achieved miniaturization and low-power consumption with excellent performance, minimizing complex calibration.

Conclusions:

• Advancements in fabrication and design have led to miniaturized, cost-effective, and high-performance millimeter wave systems.
• New planar technologies combined with waveguide methods facilitate prototyping of integrated mmWave transceivers.
• Simplified characterization techniques are crucial for the practical implementation of advanced mmWave circuits and systems.