| US 7,551,142 B1 | ||
| Hybrid antennas with directly fed antenna slots for handheld electronic devices | ||
| Zhijun Zhang, Beijing (China); Robert J. Hill, Salinas, Calif. (US); Robert W. Schlub, Campbell, Calif. (US); Juan Zavala, Watsonville, Calif. (US); and Ruben Caballero, San Jose, Calif. (US) | ||
| Assigned to Apple Inc., Cupertino, Calif. (US) | ||
| Filed on Dec. 13, 2007, as Appl. No. 11/956,314. | ||
| Int. Cl. H01Q 1/24 (2006.01) | ||
| U.S. Cl. 343—702 [343/700 MS] | 14 Claims |
| 1. A handheld electronic device antenna that is coupled to a transmission line, comprising:
a ground plane antenna element;
a slot antenna resonating element formed from an opening in the ground plane antenna element;
antenna terminals adjacent to the slot antenna resonating element with which the transmission line directly feeds the slot
antenna resonating element; and
a near-field-coupled antenna resonating element that is indirectly fed by the transmission line through near field coupling
with the directly fed slot antenna resonating element, wherein the near-field-coupled antenna resonating element has multiple
branches each of which is associated with a separate antenna resonant frequency.
|