Development of horn antenna mixer array with internal local oscillator module for microwave imaging diagnostics

Area of Science:

• Physics
• Electrical Engineering
• Plasma Diagnostics

Background:

• Microwave imaging diagnostics systems require high sensitivity and complex antenna arrays.
• Existing systems face challenges with sensitivity and complexity, necessitating improved antenna designs.

Purpose of the Study:

• To propose and characterize a new antenna array for enhanced microwave imaging diagnostics.
• To improve sensitivity and reduce complexity in systems like microwave imaging reflectometry, interferometer, and electron cyclotron emission imaging.

Main Methods:

• Design of a five-element antenna array including a horn antenna, waveguide-to-microstrip transition, mixer, local oscillation (LO) module, and intermediate frequency amplifier.
• Integration of an LO module to eliminate the need for LO optics and equalize LO power distribution.
• Characterization of a prototype antenna array.

Main Results:

• The proposed antenna array integrates key components for microwave imaging.
• The LO module effectively removes LO optics and equalizes power delivery to each element.
• Prototype testing demonstrates the feasibility and characteristics of the new antenna array.

Conclusions:

• The new antenna array offers a simplified and more sensitive solution for microwave imaging diagnostics.
• The integrated LO module is crucial for improved performance and reduced system complexity.
• The developed antenna array shows promise for advanced plasma diagnostics and other microwave imaging applications.