Patent ID: 8847847

Claim:
A dual frequency antenna module comprising: a substrate comprising a first surface and an opposite second surface; and a dual frequency antenna comprising: a grounding layer formed on the second surface; a first antenna; a second antenna, the first antenna and the second antenna being symmetrical about a central line of the dual frequency antenna, each of the first and second antennas comprising: a radiation portion configured for transmitting and receiving electromagnetic signals, the radiation portion comprising a plurality of microstrip transmission lines including first microstrip transmission lines oriented in a first direction and second microstrip transmission lines oriented in a second direction perpendicular to the first direction, the first and second microstrip transmission lines connected to each other in an alternate fashion; and a feeding portion connected between the grounding layer and the radiation portion, and configured for feeding electromagnetic signals to the radiation portion; a first connecting portion; and a second connecting portion, the first and second connecting portions being connected with each other and arranged on the first surface between the radiation portions in symmetry about the central line, each of the first and second connecting portions comprising a plurality of microstrip transmission lines arranged in a concertinaed fashion; wherein a width of each microstrip transmission line of the first and second connecting portions is less than a width of each microstrip transmission line of the first and second antennas, and a wavelength of electromagnetic waves transmissible through the microstrip transmission lines of the connecting portions is equal to one half of a wavelength of electromagnetic waves transmissible through the microstrip transmission lines of the first and second antennas.