A Compact and Wideband Active Asymmetric Transmit Array Unit Cell for Millimeter-Wave Applications.

Area of Science:

• Electrical Engineering
• Electromagnetics
• Antenna Theory

Background:

• Millimeter-wave (mm-wave) technology is crucial for high-bandwidth communication systems.
• Transmit array (TA) antennas require efficient and reconfigurable unit cells for beam steering.
• Existing unit cells often face challenges with size, bandwidth, or reconfigurability.

Purpose of the Study:

• To design and validate a compact, reconfigurable asymmetric unit cell for mm-wave TA antennas.
• To achieve a 180-degree phase shift with broad bandwidth and low insertion loss.
• To demonstrate the practical fabrication and characterization of the proposed unit cell.

Main Methods:

• Design of a reconfigurable asymmetric unit cell incorporating two MA4AGP910 pin diodes.
• Utilizing symmetry breaking to achieve desired phase shifting capabilities.
• Fabrication using LPKF laser machine and characterization via WR-34 waveguide.

Main Results:

• The proposed unit cell demonstrates a 180-degree phase difference (1-bit configuration) over a wide frequency band.
• Achieved broad bandwidth and low insertion loss despite the compact design.
• Experimental measurement results closely correlate with simulation data, validating the design.

Conclusions:

• The compact, reconfigurable asymmetric unit cell is a viable solution for mm-wave TA antennas.
• The design offers significant advantages in terms of size, performance, and reconfigurability.
• This unit cell shows promise for next-generation high-frequency antenna applications.