Patent ID: 7847738

Claim:
A microstrip antenna, positioned on a substrate comprising a first surface and a second surface opposite to the first surface, the microstrip antenna comprising: a feeding portion, positioned on the first surface, configured for feeding electromagnetic signals; a grounding portion, positioned on the second surface and electrically connected to the feeding portion; a radiating portion, positioned on the first surface, configured for transceiving the electromagnetic signals, the radiating portion comprising: a first radiator, comprising a first radiating section electronically connected to the feeding portion and a second radiating section electronically connected to the first radiating section, wherein the second radiating section is substantially perpendicular to the first radiating section; a second radiator, comprising a zigzag shape having a first end and a second end, the first end electronically connected to the second radiating section; a third radiator, comprising a third radiating section and a fourth radiating section electronically connected to the third radiating section, wherein the third radiating section is wider than the fourth radiating section, and wherein the third radiator comprises a third end and a fourth end, wherein the third end of the third radiator is electronically connecting to the second end of the second radiator, and the fourth end of the third radiator extending from the third radiator and not connected any other radiating section, wherein the fourth radiating section is substantially perpendicular to the second radiating section of the first radiator; wherein the first radiator and the third radiator co-define a receiving area, the second radiator positioned in the receiving area.