公开(公告)号：US12288938B2

公开(公告)日：2025-04-29

申请号：US18072418

申请日：2022-11-30

Applicant: ALPHA NETWORKS INC.

Inventor： Yi-Ju Lee ,  Shiao-Fan Chen

IPC: H01Q9/04 ,  H01P3/08

Abstract: A microstrip antenna includes a substrate, a feedline, an impedance matching structure, and a patch radiator, wherein the substrate has a surface. The feedline is disposed on the surface and extends along a first axial direction. The impedance matching structure is disposed on the surface and has a first end and a second end in the first axial direction, wherein the first end is connected to the feedline. The impedance matching structure has a stepped impedance change. The patch radiator is disposed on the surface, wherein the patch radiator and the second end of the impedance matching structure are adjacent and spaced by a distance in the first axial direction, and the second end of the impedance matching structure is coupled with the patch radiator through the distance. Therefore, a bandwidth of the microstrip antenna could be increased.