Redefinable planar microwave passive electronics enabled by thermal controlled VO₂/Cu hybrid matrix

Area of Science:

• Microwave Engineering
• Materials Science
• Electromagnetics

Background:

• Traditional microwave devices often lack functional reconfigurability.
• Integrating diverse functions like antennas and filters into a single unit is challenging.
• Phase transition materials offer novel pathways for dynamic electromagnetic control.

Purpose of the Study:

• To demonstrate a planar microwave array device with complex electromagnetic functional reconfigurability.
• To enable switching between antenna array and cascaded filter functions using a single design.
• To explore hybrid electromagnetic functions with further reconfigurability.

Main Methods:

• Utilizing a phase transition film, vanadium dioxide (VO2), to manipulate electromagnetic distribution.
• Employing a planar patch architecture for the microwave device.
• Developing a comprehensive design method for patch-based antenna arrays and cascaded filters.

Main Results:

• A single planar device integrates multiple mono and hybrid antenna and filter functions.
• Demonstrated a 2x2 array device operating at reconfigurable center frequencies of 3.1, 3.7, and 4.4 GHz.
• The device is compatible with standard planar CMOS processing.

Conclusions:

• A single design realizes numerous antenna and filter functions, determined by array order.
• The functionally reconfigurable microwave device facilitates recombination for multifunctional microwave systems.
• This approach offers a pathway towards versatile and adaptable front-end electronic circuits.