A waveguide antenna (200) is disclosed, comprising: a first plurality (220) of slots (222,224), for producing a beam having a first radiation pattern (301) at a first resonant frequency (f1); and a second plurality (230) of slots (232, 234), for producing a beam having a second radiation pattern (302) at a second resonant frequency (f2). A method of operation of the waveguide antenna (200) is also disclosed, comprising: operating the transceiver at a first frequency (f1) to detect objects in a first field of view; and operating the transceiver at a second frequency (fa) to detect objects in a second field of view

A wearable electronic device is described. The wearable electronic device includes two communications antennae. A first antenna of the two is a current-carrying antenna electrically and physically connected to a printed circuit board of the wearable electronic device and housed in a first portion of a housing that is configured for mounting on a person's skin. A second antenna of the two is a scatterer antenna physically connected to an interior surface of a second portion of the housing and configured to overlap a portion of the current-carrying antenna. The second portion of the housing faces away from the person's skin when the wearable device is mounted on the person's skin. Current from the current-carrying antenna is induced in the scatterer antenna to enable communications between the wearable electronic device and one or more other electronic devices.

An active-passive integrated antenna is provided. The active-passive integrated antenna includes a reflective plate, a pair of mounting portions respectively secured to two sides of a bottom of the reflective plate, a dielectric plate, a plurality of passive antenna elements and an active antenna unit. More specifically, the dielectric plate is spaced apart from the reflective plate on the pair of mounting portions, and a first surface of the dielectric plate is provided with a frequency selection surface; the plurality of passive antenna elements are respectively arranged on the reflective plate and the frequency selection surface; the active antenna unit is arranged above a second surface of the dielectric plate and secured to the pair of mounting portions.

In an antenna design, a metal frame of an electronic device and a printed circuit board (PCB) form a slot antenna radiator, where two common mode (CM) slot antenna modes of the slot antenna radiator are excited through anti-symmetrical feeding, so that when dual resonances and wideband coverage are implemented, specific absorption ratio (SAR) values in the two CM slot antenna modes are close.

In an antenna design, a metal frame of an electronic device and a printed circuit board (PCB) form a slot antenna radiator, where two common mode (CM) slot antenna modes of the slot antenna radiator are excited through anti-symmetrical feeding, so that when dual resonances and wideband coverage are implemented, specific absorption ratio (SAR) values in the two CM slot antenna modes are close.

In an embodiment a wireless earphone includes an earbud portion having a speaker module, a stalk portion having a battery, wherein the earbud portion is connected to one end of the stalk portion, a circuit board and a first antenna being a slot antenna, wherein the circuit board extends from the earbud portion to an end of the stalk portion away from the earbud portion, wherein the circuit board is connected to the speaker module and the battery, wherein the circuit board comprises a reference ground, the reference ground extending from one end of the circuit board to another end of the circuit board, and wherein a slot is disposed on the reference ground forming a radiator of the slot antenna, the slot being located in the stalk portion and extending along a length direction of the stalk portion.

An antenna assembly includes a conductive frame defining at least one slot and divided into at least a first conductive branch and a second conductive branch independently by the slot, a feed point being arranged on the first conductive branch; a resonant circuit, a signal source being coupled to and feeding a current signal to the first conductive branch through the resonant circuit and the feed point, the current signal being coupled to the second conductive branch through the slot, and multiple resonant frequencies being generated on the first and the second conductive branches through the resonant circuit; and a switching circuit configured between perform a switching adjustment for the current signal coupled to the second conductive branch such that radio frequency signals including multiple operating frequency bands are radiated simultaneously on the first conductive branch and the second conductive branch; at least two operating frequency bands being switchable.

In a system or device for identifying or tracking tools, the device comprising: a metallic wall delimiting an area wherein a first tool including an RFID tag can be placed, an antenna for communicating with the RFID tag whenever the first tool is in the first area, wherein the antenna is a slot antenna cut out in the metallic wall.

In a system or device for identifying or tracking tools, the device comprising: a metallic wall delimiting an area wherein a first tool including an RFID tag can be placed, an antenna for communicating with the RFID tag whenever the first tool is in the first area, wherein the antenna is a slot antenna cut out in the metallic wall.

Disclosed is a radar for a vehicle configured to detect objects around a vehicle using an antenna, and the radar includes a substrate-integrated waveguide (SIW) in which a plurality of bent slots is formed, at least one processor electrically connected to the substrate-integrated waveguide, and a differential line electrically connecting the substrate-integrated waveguide to the at least one processor.