Printed circuit board antenna

A printed circuit board antenna assembly comprising:

• a printed circuit board defining a plurality of grooves in top and bottom faces thereof to divide the printed circuit board into a plurality of regions;
• and
• an antenna unit formed on each of the regions, each of the antenna units comprising:
• a metal sheet functioning as a grounding plane for the antenna unit;
• microstrip traces on the top and bottom faces of a corresponding region of the printed circuit board, respectively;
• and
• a conductive hole defined through the printed circuit board and electrically connecting with the microstrip traces to form a continuous conductive line,
• wherein the antenna units are adapted to be installed in a wireless communications device using a radio frequency signal having a wavelength lambda, and the continuous conductive line of each of the antenna units has a length no less than one quarter times lambda.

A printed circuit board antenna comprising:

• a printed circuit board defining opposite top and bottom surfaces;
• a plurality of conductive microstrip traces formed on both said top and bottom surfaces;
• a plurality of through holes extending through both said top and bottom surfaces, each of said through holes being conductive and connected to the corresponding microstrip traces at two opposite ends on said top and bottom surfaces, respectively;
• wherein
• said through holes cooperating with said microstrip traces result in a continuous conductive line which travels up and down between said top and bottom surfaces more than two times for creating a 3D configuration, and terminates at a through termination hole, which is larger than said through hole, for mechanically and electrical connecting to a coaxial cable.