Antenna array and wireless communications device

A wireless communications device, comprising:

• a control circuit;
• and
• an antenna array coupled to the control circuit,
• wherein the antenna array comprises a first directional antenna and a second directional antenna coupled to the first directional antenna, wherein the first directional antenna and the second directional antenna points to different directions, wherein the first directional antenna comprises a first antenna element, a first reflector, a first feed line coupled to the first antenna element, and a first switch coupled to the first feed line for controlling the first feed line, wherein the second directional antenna comprises a second antenna element, a second reflector, a second feed line coupled to the second antenna element, and a second switch coupled to the second feed line for controlling the second feed line, wherein the first antenna element is a microstrip dipole antenna element, and a length of the first antenna element is approximately a half of an operating wavelength of the antenna array, wherein the first reflector is a parasitic microstrip antenna element, a length of the first reflector is greater than the length of the first antenna element, a distance between a midpoint of the first reflector and the first antenna element is approximately a quarter of the operating wavelength, and two ends of the first reflector are bent toward the first antenna element, wherein the second antenna element is a microstrip dipole antenna element, and a length of the second antenna element is approximately a half of the operating wavelength,
• wherein the second reflector is a parasitic microstrip antenna element, a length of the second reflector is greater than the length of the second antenna element, a distance between a midpoint of the second reflector and the second antenna element is approximately a quarter of the operating wavelength, and two ends of the second reflector are bent toward the second antenna element,
• wherein a distance between the midpoint of the first reflector and the midpoint of the second reflector is smaller than a distance between a midpoint of the first antenna element and a midpoint of the second antenna element, and
• wherein the control circuit is configured to switch off the first switch or the second switch to control the antenna array to be in a directional mode.