US 2015/0029067 A1 · RF SIGNAL PICKUP FROM AN ELECTRICALLY CONDUCTIVE SUBSTRATE UTILIZING PASSIVE SLITS

Abstract

Embodiments of the present application relate generally to electronic hardware, computer software, wireless communications, network communications, wearable, hand-held, and portable computing devices for facilitating communication of information and presentation of media. An electrically conductive substrate (e.g., a metal or metal alloy) includes an antenna formed by a slot or opening formed in the substrate, and also includes at least one separate passive slot or opening (e.g., a passive slit) formed in the substrate. The antenna may be intentionally detuned from one or more target frequencies (e.g., 802.11, 2.4 GHz, 5 GHz) such that the antenna is not optimized (e.g., is not tuned) for the one or more target frequencies. One portion of the antenna may be electrically coupled with a ground potential. Another portion of the antenna may be electrically coupled with a RF receiver, transmitter, or transceiver. The antenna may be an active antenna, a passive antenna or both.

Claims20

Dependent claims

A device, comprising:

a substrate of electrically conductive material including a plurality of separate apertures formed in the substrate,
one or more of the plurality of separate apertures comprises an antenna having length dimension that is substantially larger than a width dimension, an edge of the aperture along the length dimension is electrically coupled with a radio frequency (RF) receiver and an opposing edge of the aperture along the length dimension is electrically coupled with a ground potential,
the length dimension is selected to detune the antenna at a frequency that is lower than a target frequency to be detected by the RF receiver, the length dimension being longer than a wavelength of the target frequency divided by two, and
a different one or more of the plurality of separate apertures comprises a passive slit that is not electrically coupled with the RF receiver or the ground potential.

1 more element

A multi-channel dual band wireless communication and radio frequency (RF) proximity detection system, comprising:

circuitry configured to implement a 2×2 Multiple-Input/Multiple-Output (MIMO) mode and a 1×2 MIMO mode, the circuitry configured to reversibly switch between the 2×2 MIMO mode and the 1×2 MIMO mode in response to a mode signal electrically coupled with a RF switch, the circuitry including
a first RF chain electrically coupled with the RF switch and configured, when the mode signal is set to the 2×2 MIMO mode, to be electrically coupled through the RF switch with a first dual band antenna and to transmit and receive first and second dual band RF signals using the first dual band antenna, and
configured, when the mode signal is set to the 1×2 MIMO mode, to be electrically coupled through the RF switch with a RF proximity detection antenna and to receive only, using the RF proximity detection antenna, a fifth RF signal, and
a second RF chain electrically coupled with a second dual band antenna and configured, when the mode signal is set to the 2×2 MIMO mode or the 1×2 MIMO mode, to transmit and receive third and fourth dual band RF signals using the first dual band antenna.

1 more element

Dependencies are inferred from the claim text.

Rf signal pickup from an electrically conductive substrate utilizing passive slits

Life of this patent

Rf signal pickup from an electrically conductive substrate utilizing passive slits

Life of this patent

Abstract

Claims20