A communication device and a detachable antenna with dynamic antenna tuning is provided. The detachable antenna comprises: an electrically insulating base; a main antenna and a first antenna element, at the base, respectively operable at independent first and second given frequencies. The device further comprises: a memory associating the first and second given frequencies; an antenna port configured to detachably receive the base of the detachable antenna; a second antenna element, at the antenna port, operable to wirelessly interact with the first antenna element when the base of the detachable antenna is received at the antenna port; a circuit configured to detect wireless interactions between the second antenna element and the first antenna element; and a controller configured to: select the first given frequency using the second given frequency, as detected via the circuit; and, thereafter wirelessly communicate via the main antenna operated at the first given frequency.

A portable free-standing vertical RF antenna structure for use in an UHF timing system comprises a base structure for supporting the vertical antenna structure on a substantially horizontal surface. At least a first antenna unit comprising a first planar RF antenna and at least a second antenna unit comprising a second planar RF antenna, the second antenna unit being located above the first antenna unit, are coupled to the base structure and form a vertical RF antenna structure. The first and second antenna unit is positioned such that the inclination angle between a main axis of the radiation field of the first RF antenna and the horizontal surface is selected between 10 and 50 degrees. The inclination angle between a main axis of the radiation field of the second RF antenna and the horizontal surface is selected between 20 and 20 degrees.

A communication device includes a ground element, an antenna structure, a first reflector, a second reflector, a first tuning element, and a switch element. The first reflector is disposed adjacent to the antenna structure. The second reflector is disposed adjacent to the antenna structure. The second reflector is separate from the first reflector. The switch element is coupled to the first tuning element. When the switch element is enabled, the switch element couples the first tuning element to the first reflector or the second reflector. When the switch element is disabled, the first tuning element is separate from the first reflector and the second reflector.

A method, wireless communication device (WCD), and computer program product deploys an additional, retractable antenna to enhance signal communication within an identified network. A processor executes an antenna deployment module (ADM) in order to determine a link status based on a quality and/or a strength of communication signals propagated via at least one stationary antenna. In response to the link status indicating that coverage of a second/target network is available or that a quality of a signal propagated within a first network is less than a threshold level, the ADM provides a deployment signal to a deployment component. In response to receiving the deployment signal, the deployment component deploys the retractable antenna by extending the retractable antenna from a stowed position to a deployed position. The ADM enables the WCD to communicate within the selected network via the deployed retractable antenna using a higher quality communication signal.

An electronic device includes an antenna structure. The electronic device includes a bezel and a dielectric layer. The bezel has a first position and a second position, and a bezel between the first position and the second position is configured as an antenna radiator. A first dielectric is disposed on at least a part of an inner surface of the bezel besides the bezel between the first position and the second position. A second dielectric is disposed on at least a part of a surface of the antenna radiator. The first dielectric is different from the second dielectric.

A wireless control device, such as a system controller for a load control system, may comprise a light-transmissive cover for an antenna that may be illuminated to provide feedback to a user of the load control system. The light-transmissive cover may receive light energy from a light-generating circuit to provide a visible display of the light energy. The wireless control device may be mounted to, for example, a ceiling, and the light-transmissive cover may extend from the wireless control device (e.g., down from the ceiling). The light-transmissive cover may be viewed by a user at large viewing angles and at a distance away from the wireless control device, which may simplify and improve reliability of commissioning of the load control system as well as speed up troubleshooting of the load control system after commissioning is completed.

An antenna is provided for a wearable personal computing device, such as an earbud. The antenna integrates with other components of the wearable device, such as an input control. For example, the antenna may at least partially surround a portion of a touchpad input at a surface of the device that is exposed when the device is worn. In one example, the antenna shares a ground plane with the touchpad. In another example, the antenna includes two nested traces, wherein a first trace is connected to ground and a second trace is connected to an antenna feed.

An antenna of reduced size but of multiple functions according to manual adjustment includes a side frame made of metallic material, a feeding portion, and a moving module. The side frame defines first and second gaps each passing through the side frame to form at least one radiating portion. The feeding portion can feed current to either of the radiating portions. The metallic and movable moving module including an extending portion is movable relative to the side frame. In a first position, the extending portion is not connected to any radiating portion, and when moved to a second position, the extending portion is connected to one of the radiating portions.

An electronic device is provided. The electronic device includes a first electronic component, a second electronic component, a holder, and an antenna assembly. The second electronic component is slidably coupled to the first electronic component. The holder is coupled to the second electronic component and inserted into the first electronic component. The antenna assembly includes a radio frequency (RF) module, an antenna radiator, and an RF cable. The RF module is disposed in the first electronic component. The antenna radiator is disposed in the second electronic component. An end of the RF cable is coupled to the antenna radiator and the holder, and another end of the RF cable is coupled to the radio frequency module. The RF cable is retracted and stretched when the holder is driven to slide by sliding the second electronic component. A control method of the electronic device is also provided.

An electronic device is provided. The electronic device includes a sensor, an antenna, a positioning circuit configured to receive satellite signals through the antenna using a specified frequency band, a resonant frequency adjustment circuit configured to adjust a resonant frequency of the antenna, and a processor, wherein the processor is configured to, identify whether the electronic device is in water using the sensor, when the electronic device is not in water, adjust the resonant frequency to a first frequency band specified according to a first permittivity of air in relation to the specified frequency band using the resonant frequency adjustment circuit, when the electronic device is in water, adjust the resonant frequency of the antenna to a second frequency band specified according to a second permittivity of water in relation to the specified frequency band using the resonant frequency adjustment circuit, receive the satellite signals through the antenna of which the resonant frequency has been adjusted to a frequency band corresponding to one of the first frequency band and the second frequency band using the positioning circuit; and determine a position of the electronic device primarily on the basis of the received satellite signals using the positioning circuit.