Dual-band compact printed circuit antenna for WLAN use

A dual-band printed circuit antenna for radio frequency (RF) and having:

• a feedline region and a radiation region, the feedline region having an upper trace plane and an associated feedline ground reference structure;
• said feedline region having said feedline conductor carrying RF in at least one of a high-band upper (HB-U) frequency, a high-band lower (HB-L) frequency which is lower than said HB-U frequency, or a low-band (LB) frequency which is lower than said highband (HB-L) frequency;
• said feedline region having a first feedline conductor coupled to an HB-U radiating structure formed by a first segment coupled to a second segment perpendicular to said first segment;
• said first segment also coupling said LB frequency to a third segment across a gap between common edges of said first segment and said third segment, said third segment coupled, in sequence, to a fourth segment, a fifth segment, a sixth segment, a seventh segment, an eighth segment, and a ninth segment having a terminus, said terminus coupled to said ground reference structure;
• said first segment, said third segment, said fifth segment, said seventh segment, and said ninth segment substantially parallel to each other and also substantially perpendicular to said second segment, said fourth segment, said sixth segment, and said eighth segment;
• said feedline conductor, said first segment, and said second segment forming a contiguous conductor which is separate from a contiguous conductor formed by said third segment, said fourth segment, said fifth segment, said sixth segment, said seventh segment, said eighth segment, and said ninth segment.