Dual-band antenna module

A dual-band antenna module, comprising:

• a substrate;
• a dual-band omnidirectional antenna having a feed-in end disposed on the substrate, wherein the dual-band omnidirectional antenna is disposed perpendicular to the substrate and resonates to generate a first radio-frequency signal with a first frequency and a second radio-frequency signal with a second frequency, wherein the second frequency is higher than the first frequency;
• a low-frequency reflection module disposed on the substrate for selectively reflecting the first radio-frequency signal with the first frequency when the dual-band omnidirectional antenna operates in a directional mode, wherein the low-frequency reflection module comprises:
• a first low-frequency reflection unit, the first low-frequency reflection unit being activated according to a first low-frequency directional control signal to reflect the first radio-frequency signal with the first frequency;
• a second low-frequency reflection unit, the second low-frequency reflection unit being activated according to a second low-frequency directional control signal to reflect the first radio-frequency signal with the first frequency;
• and
• a third low-frequency reflection unit, the third low-frequency reflection unit being activated according to a third low-frequency directional control signal to reflect the first radio-frequency signal with the first frequency;
• and
• a high-frequency reflection module disposed on the substrate for selectively reflecting the second radio-frequency signal with the second frequency when the dual-band omnidirectional antenna operates in the directional mode, wherein the high-frequency reflection module comprises:
• a first high-frequency reflection unit, the first high-frequency reflection unit being activated according to a first high-frequency directional control signal to reflect the second radio-frequency signal with the second frequency;
• a second high-frequency reflection unit, the second high-frequency reflection unit being activated according to a second high-frequency directional control signal to reflect the second radio-frequency signal with the second frequency;
• and
• a third high-frequency reflection unit, the third high-frequency reflection unit being activated according to a third high-frequency directional control signal to reflect the second radio-frequency signal with the second frequency.