Two new Apple patents have appeared at the U.S. Patent & Trademark Office that show Apple is working on different antenna ideas.
Patent number 8223082 involves slot antennas for electronic devices. The slot antennas may have a dielectric-filled slot that is formed in a ground plane element. The ground plane element may be formed from part of a conductive device housing. The slot may have one or more holes at its ends.
The holes may affect the impedance characteristics of the slot antennas so that the length of the slot antennas may be reduced. For example, the holes can be used to synthesize the impedance of the slot antennas so that the slot antennas have a resonant frequency that is different from their natural resonant frequency.
The holes may affect the impedance of the slot antennas in multiple radio-frequency bands. The inventors are Bing Chiang, Douglas B. Kough and Enrique Ayala Vazquez.
Patent number 8223077...| Read more »