A system and method is disclosed for identification of a musical note played by a musical wind instrument with a resonant chamber having a plurality of configurations selectable by a player of the musical wind instrument and an electrically conductive surface in the resonant chamber. The system and method include a stimulation signal generator for generating a stimulation signal and antenna means mountable on the musical instrument for broadcasting the stimulation signal as an electromagnetic signal within the resonant chamber and for receiving a reflected electromagnetic signal from the resonant chamber The system and method also include an electronic processing unit for processing the reflected electromagnetic signal and determining therefrom a configuration of the resonant chamber selected by the player and indicative of a musical note that is or would be output by the instrument when played at the time of the received reflected signal.

A system and method is disclosed for identification of a musical note played by a musical wind instrument with a resonant chamber having a plurality of configurations selectable by a player of the musical wind instrument and an electrically conductive surface in the resonant chamber. The system and method include a stimulation signal generator for generating a stimulation signal and antenna means mountable on the musical instrument for broadcasting the stimulation signal as an electromagnetic signal within the resonant chamber and for receiving a reflected electromagnetic signal from the resonant chamber The system and method also include an electronic processing unit for processing the reflected electromagnetic signal and determining therefrom a configuration of the resonant chamber selected by the player and indicative of a musical note that is or would be output by the instrument when played at the time of the received reflected signal.

Base station antennas include an externally accessible active antenna module releasably coupled to a recessed segment that is over a chamber in the base station antenna and that is longitudinally and laterally extending along and across a rear of a base station antenna housing. The base station antenna housing has a passive antenna assembly that cooperates with the active antenna module.

Base station antennas include an externally accessible active antenna module releasably coupled to a recessed segment that is over a chamber in the base station antenna and that is longitudinally and laterally extending along and across a rear of a base station antenna housing. The base station antenna housing has a passive antenna assembly that cooperates with the active antenna module.

A ground plane is disposed on or in an inner layer of a dielectric substrate. Moreover, a feed line is disposed on or in the dielectric substrate. A first antenna element and a second antenna element are supported on the dielectric substrate. The first antenna element and the second antenna element include a first radiating element and a second radiating element connected to the feed line, respectively, and are disposed on a same side when seen from the ground plane. With a height of the ground plane being a reference, a top portion of the second antenna element is located higher than a top portion of the first antenna element. There is provided an antenna device of which the band can be expanded and of which the internal space of the casing can be effectively utilized.

A ground plane is disposed on or in an inner layer of a dielectric substrate. Moreover, a feed line is disposed on or in the dielectric substrate. A first antenna element and a second antenna element are supported on the dielectric substrate. The first antenna element and the second antenna element include a first radiating element and a second radiating element connected to the feed line, respectively, and are disposed on a same side when seen from the ground plane. With a height of the ground plane being a reference, a top portion of the second antenna element is located higher than a top portion of the first antenna element. There is provided an antenna device of which the band can be expanded and of which the internal space of the casing can be effectively utilized.

Beam forming antennas for base station applications are configured as dielectric resonator antennas (DRAs) having arrays of dielectric resonator radiating elements (DRRE) therein with dual-polarized radiating properties. Each DRRE includes a dielectric radiating element (DRE) electromagnetically coupled by a resonant cavity to a respective cross-polarized feed network, which is responsive to first and second radio frequency (RF) input feed signals. Each resonant cavity may be configured as a polymer-filled resonant cavity, and each DRE may be configured as a cylindrically-shaped or dome-shaped dielectric radiating element.

In a described example, an apparatus includes: a patch antenna formed in a first conductor layer on a device side surface of a multilayer package substrate, the multilayer package substrate including conductor layers spaced from one another by dielectric material and coupled to one another by conductive vertical connection layers, the multilayer package substrate having a board side surface opposite the device side surface; and a semiconductor die mounted to the device side surface of the multilayer package substrate spaced from and coupled to the patch antenna.

In a described example, an apparatus includes: a patch antenna formed in a first conductor layer on a device side surface of a multilayer package substrate, the multilayer package substrate including conductor layers spaced from one another by dielectric material and coupled to one another by conductive vertical connection layers, the multilayer package substrate having a board side surface opposite the device side surface; and a semiconductor die mounted to the device side surface of the multilayer package substrate spaced from and coupled to the patch antenna.

A reflectarray antenna system includes an antenna feed configured to at least one of transmit and receive a wireless signal occupying a frequency band. The system also includes a reflector having a reflectarray. The reflectarray includes a plurality of reflectarray elements, where each of the reflectarray elements includes a dipole element. The dipole element of at least a portion of the plurality of reflectarray elements comprises a crossed-dipole portion and a looped-dipole portion. The plurality of reflectarray elements can be configured to selectively phase-delay the wireless signal to provide the wireless signal as a coherent beam.