A wireless communication device comprising: a case having a substantially cylindrical shape and including a first opening at a front surface and a second opening at a back surface, respectively; a first cover member that blocks at least a portion of the first opening; a second cover member that blocks at least a portion of the second opening; an insulating member that fills a gap between the first cover member and the case; a display; a substrate housed by the case; an antenna circuit installed on the substrate; and a communication circuit installed on the substrate and electrically connected to the antenna circuit, wherein the case includes a metal material; and the first cover member includes a light-transmitting material that allows light from the display to pass through.

A wireless communication device comprising: a case having a substantially cylindrical shape and including a first opening at a front surface and a second opening at a back surface, respectively; a first cover member that blocks at least a portion of the first opening; a second cover member that blocks at least a portion of the second opening; an insulating member that fills a gap between the first cover member and the case; a display; a substrate housed by the case; an antenna circuit installed on the substrate; and a communication circuit installed on the substrate and electrically connected to the antenna circuit, wherein the case includes a metal material; and the first cover member includes a light-transmitting material that allows light from the display to pass through.

A temperature sensing device includes a temperature sensor to measure a temperature of a cooking chamber of a cooking appliance. A housing of the temperature sensing device is configured to be mounted on the cooking appliance. A Printed Circuit Board Assembly (PCBA) inside the housing is coupled to the temperature sensor, and an insulating layer is located outside an interior wall of the housing. In one aspect, an antenna is coupled to the PCBA to wirelessly transmit data from the temperature sensing device indicating the measured temperature. In another aspect, the temperature sensing device includes a temperature gauge with a needle to indicate the measured temperature, and a motor inside the housing to actuate the needle. According to another aspect, the temperature sensing device is a wireless signal repeater including an exterior antenna and an interior antenna to transmit signals through a wall of the cooking appliance.

A communication device is made with a metallic frame having an interior mounting surface for receiving one or more functional components. The metallic frame includes a first frame member having a first portion extending uninterrupted across one lateral side of the metallic frame. The first portion provides structural support to the communication device. A T-shaped slot antenna is formed in a second portion of the first frame member adjacent to the first portion. The T-shaped slot antenna has first and second arms separated at a gap and partially encompassing a slot. The second portion of the first frame member enables radio frequency communication by at least one of the functional components via the T-shaped slot antenna of the communication device.

A communication device is made with a metallic frame having an interior mounting surface for receiving one or more functional components. The metallic frame includes a first frame member having a first portion extending uninterrupted across one lateral side of the metallic frame. The first portion provides structural support to the communication device. A T-shaped slot antenna is formed in a second portion of the first frame member adjacent to the first portion. The T-shaped slot antenna has first and second arms separated at a gap and partially encompassing a slot. The second portion of the first frame member enables radio frequency communication by at least one of the functional components via the T-shaped slot antenna of the communication device.

An antenna structure includes a housing, a first feed source, a second feed source, and a resonance circuit. The housing includes a first and a second radiator spaced to each other and grounded. The first feed source feeds current into the first radiator to activate a first mode, a second mode, and a third mode to generate radiation signals in a first frequency band, a second frequency band, and a third frequency band. The second feed source feeds current into the second radiator to activate a fourth mode to generate radiation signals in a fourth frequency band. The resonance circuit adjusts a radiation frequency band of the second radiator according to an impedance of the resonance circuit. The first radiator adjusts the third mode according to the radiation frequency band of the second radiator. A wireless communication device employing the antenna structure is also provided.

An antenna structure includes a housing, a first feed source, a second feed source, and a resonance circuit. The housing includes a first and a second radiator spaced to each other and grounded. The first feed source feeds current into the first radiator to activate a first mode, a second mode, and a third mode to generate radiation signals in a first frequency band, a second frequency band, and a third frequency band. The second feed source feeds current into the second radiator to activate a fourth mode to generate radiation signals in a fourth frequency band. The resonance circuit adjusts a radiation frequency band of the second radiator according to an impedance of the resonance circuit. The first radiator adjusts the third mode according to the radiation frequency band of the second radiator. A wireless communication device employing the antenna structure is also provided.

A composite right/left-handed transmission line antenna includes a first radiator, a second radiator, and a capacitive matching circuit, where the first radiator is connected to the second radiator, the connected first radiator and second radiator are of a ring shape, and the matching circuit is connected to a feed-in point of the first radiator or the second radiator.

A composite right/left-handed transmission line antenna includes a first radiator, a second radiator, and a capacitive matching circuit, where the first radiator is connected to the second radiator, the connected first radiator and second radiator are of a ring shape, and the matching circuit is connected to a feed-in point of the first radiator or the second radiator.

The disclosure relates to patch antennas for radar or communications applications. Example embodiments include an antenna comprising: a substrate; a ground plane on a first face of the substrate; and a patch antenna on an opposing second face of the substrate, the patch antenna having a lead extending along a central axis and connected to a rectangular radiating element, wherein the rectangular radiating element comprises two slots on opposing sides of the central axis such that the patch antenna has two resonant frequencies within an operating frequency range of the antenna.