Abstract: The subject disclosure may include, for example, a multi-port antenna structure including an antenna having a first antenna port to transmit electromagnetic signals and a second antenna port to receive electromagnetic signals, where the antenna is coupled to a housing assembly of a communication device to transmit energy between the housing assembly and the first antenna port and second antenna port, and where first resonant modes of the housing assembly for the first antenna port and second resonant modes of the housing assembly for the second antenna port are such that the first and second antenna ports are substantially isolated from each other. Other embodiments are disclosed.

Abstract: A system that incorporates the subject disclosure may include, for example, a method for electrically coupling a first lower frequency radiator of a first antenna to a first upper frequency radiator of a second antenna via a shared first port, electrically coupling a second lower frequency radiator of the first antenna to a second upper frequency radiator of the second antenna via a shared second port, suppressing, at least in part, with at least one first filter, first signals of the first lower frequency radiator from entering the first upper frequency radiator, second signals of the first upper frequency radiator from entering the first lower frequency radiator, or both, and suppressing, at least in part, with at least one second filter, third signals of the second lower frequency radiator from entering the second upper frequency radiator, fourth signals of the second upper frequency radiator from entering the second lower frequency radiator, or both. Other embodiments are disclosed.

Abstract: A multimode antenna structure transmits and receives electromagnetic signals in a communications device.

Abstract: A system that incorporates the subject disclosure may include, for example, a method for coupling a primary antenna to an auxiliary antenna portion with a current-controlled switch. The method further includes generating a unidirectional direct current or a first bias voltage having a first polarity to cause the current-controlled switch to substantially form a conduction channel between the primary antenna and the auxiliary antenna portion. While the conduction channel is present, a first resonance frequency range of the primary antenna is frequency shifted to a second resonance frequency range. The method can also include removing the unidirectional direct current or generating a second bias voltage having a second polarity to cause the current-controlled switch to form an open circuit between the primary antenna and the auxiliary antenna portion. While the open circuit is present, the first resonance frequency range of the primary antenna is restored. Other embodiments are disclosed.

Abstract: A multi-port antenna structure for a wireless-enabled communications device includes a coupler-antenna having a first antenna port for transmitting electromagnetic signals and a second antenna port for receiving electromagnetic signals. The coupler-antenna is positioned on a chassis of the wireless enabled communications device to transmit energy between the chassis and the first and second antenna ports. Resonant modes of the chassis for one antenna port are orthogonal to resonant modes of the chassis for the other antenna port, such that the first and second antenna ports are isolated from each other.

Abstract: A method is provided for reducing near-field radiation and specific absorption rate (SAR) values in a communications device. The communications device includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point.

Abstract: A radio communications device includes a base unit having an enclosure and a radio system inside the enclosure. The device also includes an antenna unit detachably connected to the enclosure of the base unit. The antenna unit includes one or more antennas, each having an electrical radio frequency (RF) connection to the radio system via a non-conductive coupling through the enclosure.

Abstract: A multimode antenna structure transmits and receives electromagnetic signals in a communications device.

Abstract: A multi-port antenna structure includes a plurality of electrically conductive elements arranged generally symmetrically about a central axis with a gap between adjacent electrically conductive elements. Each of the electrically conductive elements has opposite ends and a bent middle portion therebetween, with the bent middle portion being closer to the central axis than the opposite ends. Each of the electrically conductive elements is configured to have an electrical length selected to provide generally optimal operation within one or more selected frequency ranges. Each of a plurality of antenna ports is connected to adjacent electrically conductive elements across the gap therebetween such that each antenna port is generally electrically isolated from another antenna port at a given desired signal frequency range and the antenna structure generates diverse antenna patterns.

Abstract: One or more embodiments are directed to a multimode antenna structure for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure is configured for optimal operation in a given frequency range. The antenna structure includes a plurality of antenna ports operatively coupled to the circuitry, and a plurality of antenna elements, each operatively coupled to a different one of the antenna ports. Each of the plurality of antenna elements is configured to have an electrical length selected to provide optimal operation within the given frequency range. The antenna structure also includes one or more connecting elements electrically connecting the antenna elements such that electrical currents on one antenna element flow to a connected neighboring antenna element and generally bypass the antenna port coupled to the neighboring antenna element.

Abstract: A sound reproducing device. The sound reproducing device for receiving a frequency-hopping signal having an instantaneous frequency within a hopping bandwidth. The sound reproducing device comprises a first antenna having a bandwidth including the hopping bandwidth for producing a first received signal and a second antenna tunable to frequencies within the hopping bandwidth responsive to an instantaneous hopping frequency. The second antenna produces a second received signal. The device further comprises a module for processing one or both of the first and second received signals to produce a signal for driving the sound reproducing device.

Abstract: An antenna system is provided in a portable electronics device having a printed circuit board assembly. The antenna system includes a first antenna and a second balanced antenna provided on the printed circuit board assembly. The first antenna is fed from a portion of the printed circuit board assembly such that a ground plane of the printed circuit board assembly serves as a counterpoise for the first antenna. The second balanced antenna has dipole ends configured and oriented to generally minimize coupling to the ground plane of the printed circuit board assembly to increase isolation between the first antenna and the second balanced antenna.

Abstract: One or more embodiments are directed to a multimode antenna structure for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure is configured for optimal operation in a given frequency range. The antenna structure includes a plurality of antenna ports operatively coupled to the circuitry, and a plurality of antenna elements, each operatively coupled to a different one of the antenna ports. Each of the plurality of antenna elements is configured to have an electrical length selected to provide optimal operation within the given frequency range. The antenna structure also includes one or more connecting elements electrically connecting the antenna elements such that electrical currents on one antenna element flow to a connected neighboring antenna element and generally bypass the antenna port coupled to the neighboring antenna element.

Abstract: An antenna system supports a common resonance mode and differential resonance mode, each with approximately equal radiation resistance and bandwidth at a given operating frequency band. The antenna system includes a resonant antenna section, a counterpoise, and two antenna ports. The resonant antenna section includes two spaced-apart poles and a distributed network therebetween. Each of the poles has a proximal end connected to the distributed network and an opposite distal end. The distal ends of the poles are separated from each other by a distance of ? to ? of the electrical wavelength at the given operating frequency. Each of the two antenna ports is defined by a pair of feed terminals with one feed terminal located on the counterpoise and the other feed terminal located on a different one of the poles of the resonant antenna section.

Abstract: A method is provided for reducing near-field radiation and specific absorption rate (SAR) values in a communications device. The communications device includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure.

Abstract: A multimode antenna structure is provided for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure includes a plurality of antenna ports for coupling to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and a plurality of connecting elements. The connecting elements each electrically connect neighboring antenna elements such that the antenna elements and the connecting elements are arranged about the periphery of the antenna structure and form a single radiating structure.

Abstract: A multi-port antenna structure for a wireless-enabled communications device includes a coupler-antenna having a first antenna port for transmitting electromagnetic signals and a second antenna port for receiving electromagnetic signals. The coupler-antenna is positioned on a chassis of the wireless enabled communications device to transmit energy between the chassis and the first and second antenna ports. Resonant modes of the chassis for one antenna port are orthogonal to resonant modes of the chassis for the other antenna port, such that the first and second antenna ports are isolated from each other.

Abstract: A multi-port antenna structure includes a plurality of electrically conductive elements arranged generally symmetrically about a central axis with a gap between adjacent electrically conductive elements. Each of the electrically conductive elements has opposite ends and a bent middle portion therebetween, with the bent middle portion being closer to the central axis than the opposite ends. Each of the electrically conductive elements is configured to have an electrical length selected to provide generally optimal operation within one or more selected frequency ranges. Each of a plurality of antenna ports is connected to adjacent electrically conductive elements across the gap therebetween such that each antenna port is generally electrically isolated from another antenna port at a given desired signal frequency range and the antenna structure generates diverse antenna patterns.

Abstract: One or more embodiments are directed to a multimode antenna structure for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure is configured for optimal operation in a given frequency range. The antenna structure includes a plurality of antenna ports operatively coupled to the circuitry, and a plurality of antenna elements, each operatively coupled to a different one of the antenna ports. Each of the plurality of antenna elements is configured to have an electrical length selected to provide optimal operation within the given frequency range. The antenna structure also includes one or more connecting elements electrically connecting the antenna elements such that electrical currents on one antenna element flow to a connected neighboring antenna element and generally bypass the antenna port coupled to the neighboring antenna element.