Co-Design of Characteristic Mode and Coupling Matrix for Frequency
Scanning Coupled-Patch Arrays
Abstract
A co-design approach is proposed in this communication for an efficient
design of frequency scanning coupled-patch arrays (CPAs) with wide
scanning range and high scanning rate. It combines characteristic mode
analysis (CMA) and coupling matrix analysis in the design, where the
former is employed for radiation pattern synthesis while the latter
tunes the feeding reflection and mode excitation based on a
coupled-resonator network model. With this systematic approach, it
becomes efficient to control both beam scanning properties and feeding
reflection. 3rd-order and 6th-order design examples are provided to
validate the proposed method. The 6th-order CPA achieves a wide scanning
range of 73◦ (from −45◦ to 28◦ across broadside) and a
high scanning rate of 26:1â—¦/1%. Both scanning range and scanning
rate are much higher than other reported CPAs.