Patent ID: 9059515
Filing Date: 2015-06-16
Classification: H01Q

Abstract:
1. A dual band antenna providing a high forward gain, comprising: a radiator; a director disposed in front of the radiator; and a reflector disposed behind the radiator, wherein the radiator comprises a dual resonance notch antenna including a first conducting plate, a feeding portion, and a first two slots formed in the first conducting plate, wherein the first two slots have different lengths and are aligned with each other, and wherein the feeding portion is disposed in one of the first two slots, and wherein the director comprises a second conducting plate, a first short-circuiting portion and a second two slots formed in the second conducting plate, wherein the second two slots have different lengths and are aligned with each other, and wherein the first short-circuiting portion is disposed in one of the second two slots at a position corresponding to the feeding portion in the dual resonance notch antenna; wherein the reflector comprises a third conducting plate, a second short-circuiting portion, and a third two slots formed in the third conducting plate, wherein the third two slots have different lengths and are aligned with each other, wherein the second short-circuiting portion is disposed in one of the third two slots at a position corresponding to the feeding portion in the dual resonance notch antenna; wherein each of the first, second and third conducting plates is disposed such that the direction of a normal to the conducting plates is the front-rear direction.