Abstract: Embodiments are disclosed for an antenna system comprising an over-resonant antenna conductor and a radio receiver electrically coupled to the over-resonant antenna conductor. The antenna system further comprises a capacitor electrically coupled to the over-resonant antenna conductor and sized to match the antenna conductor to a selected frequency.

Abstract: Planar antennas comprise capacitively coupled antenna patches. A first antenna patch configured to radiate in a first frequency band is coupled to a transmitter/receiver. The first antenna patch is situated to capacitively couple radiation in the first frequency band and a second frequency band to second and third antenna patches, respectively. The first and second antenna patches extend antenna bandwidth in the first frequency band, and the third antenna patch is bent so that the antenna patches can be situated in a predetermined substrate area.

Abstract: Antennas, antenna systems, and components used in antenna systems are provided herein. In various examples, an integrated antenna for receiving signals for a plurality of functional modules in a computing device may include a first plurality of antenna elements for receiving signals at wireless communication frequencies and a second plurality of antenna elements for receiving signals at wireless charging frequencies. The first and the second pluralities of antenna elements may have at least one common antenna element, which may be coupled to one or more of the second plurality of antenna elements using at least one low-pass filter. The at least one common antenna element is de-coupled from one or more of the plurality of functional modules operating at the wireless communication frequencies using at least one high-pass filter.

Abstract: An electronic device case includes a conductive cap section and a conductive bezel section forming a perimeter outside the conductive cap section and separated from the conductive cap section by a bezel gap. A conductive ground plane section forms a perimeter and is positioned opposite the conductive cap section and the conductive bezel section. The conductive ground plane section is separated from the conductive bezel section by a perimeter gap. One or more components reside between the conductive cap section and the conductive ground plane section forming a resonant cavity including a ground plane resonant cavity portion between the one or more components and the conductive ground plane section and a substantially annular resonant cavity portion between the one or more components and the perimeters of the conductive bezel section and the conductive ground plane section.

Abstract: Reconfigurable multi-band filter techniques are described. In one or more implementations a device includes a radiating structure and a filter connected to the radiating structure configured to filter wireless signals received by the radiating structure. The filter includes switchable resonators configured to tune to different frequency bands and tunable capacitors configured to tune to different frequencies within the different frequency bands.

Abstract: A dual band printed antenna pair operates simultaneously at both WLAN frequency bands (2.4 GHz/5 GHz). The antenna pair provides high isolation between both antennas while having an efficient over the air performance. The antenna pair achieve greater than 20 dB isolation at 2.4 GHz and 5 GHz band, while having antennas positioned in close proximity. The high isolation is accomplished using an orthogonal antenna configuration (exploiting orthogonal polarization) and a parasitic element to further enhance isolation at 2.4 GHz. The antenna pair and parasitic element are printed on a Printed Circuit Board (PCB) adding relatively little cost to the Radio Frequency (RF) interface. The PCB is then fixed on top of a metal chassis with the antenna keep out area overhanging a corner of the metal chassis to enhance performance.

Abstract: Techniques for utilization of antenna loading for impedance matching are described. In at least some embodiments, a device (e.g., a smart phone) includes multiple antennas that are employed to send and receive wireless signals for the device. The device further includes impedance matching functionality communicatively connected to the antennas, and configured to perform impedance matching for one of the antennas based on loading (e.g., dielectric loading) of another of the antennas.

Abstract: Techniques for utilization of antenna loading for impedance matching are described. In at least some embodiments, a device (e.g., a smart phone) includes multiple antennas that are employed to send and receive wireless signals for the device. The device further includes impedance matching functionality communicatively connected to the antennas, and configured to perform impedance matching for one of the antennas based on loading (e.g., dielectric loading) of another of the antennas.

Abstract: Embodiments are disclosed for an antenna system comprising an over-resonant antenna conductor and a radio receiver electrically coupled to the over-resonant antenna conductor. The antenna system further comprises a capacitor electrically coupled to the over-resonant antenna conductor and sized to match the antenna conductor to a selected frequency.

Abstract: An apparatus is provided with a conductive bezel section and a conductive ground plane section forming a perimeter and being positioned opposite the conductive bezel section. The conductive ground plane section is separated from the conductive bezel section by a perimeter gap at the perimeter. A structural tank circuit is integrated with and connecting the conductive bezel section and the conductive ground plane section across the perimeter gap. Another implementation may include a structural capacitor or a structural inductor integrated with and connecting the conductive bezel section and the conductive ground plane section across the perimeter gap.

Abstract: An electronic device case includes a conductive cap section and a conductive bezel section forming a perimeter outside the conductive cap section and separated from the conductive cap section by a bezel gap. A conductive ground plane section forms a perimeter and is positioned opposite the conductive cap section and the conductive bezel section. The conductive ground plane section is separated from the conductive bezel section by a perimeter gap. One or more components reside between the conductive cap section and the conductive ground plane section forming a resonant cavity including a ground plane resonant cavity portion between the one or more components and the conductive ground plane section and a substantially annular resonant cavity portion between the one or more components and the perimeters of the conductive bezel section and the conductive ground plane section.

Abstract: Multiband antenna decoupling networks and systems including multiband antenna decoupling networks are provided herein. A multiband decoupling network is connected to two or more closely spaced antennas. The multiband decoupling network includes lumped components and is reconfigurable to decouple the two or more antennas at a plurality of distinct communication frequency bands. The multiband decoupling network may include tunable lumped components and be reconfigurable through tuning the tunable lumped components. A pi network may be used for the multiband decoupling network. At least one separate impedance-matching network may also be used to match the input impedance of the multiband decoupling network to the output impedance of transmission lines leading to the multiband decoupling network.

Abstract: A multiband monopole antenna for a mobile device is disclosed that can be dynamically switched between a quarter-wave monopole antenna and a half-wave folded monopole antenna. In one embodiment, a radiator element can be built into at least part of a decorative trim on an outer casing of the mobile device. A circuit element embedded into the radiator element can electrically connect or disconnect a radiator element tip from a grounded portion of the decorative trim. In some embodiments, the circuit element can be a switch or a passive filter element, such as an inductor/capacitive-based filter. In other embodiments, the circuit element can be a tunable filter circuit whose impedance can be dynamically changed.

Abstract: Multi-antenna systems, including mobile devices having multiple antennas, are provided herein. A first antenna and a second antenna are operable at two or more of the same non-overlapping communication frequency bands. The first antenna and the second antenna are closely spaced and have different fundamental modes of operation such that the first antenna and second antenna are substantially isolated at the two or more non-overlapping communication frequency bands. The first antenna and second antenna having different fundamental modes can be a linear antenna, such as a monopole, dipole, PIFA, or PILA, and an aperture antenna, such as a slot or loop antenna.

Abstract: A reconfigurable monopole antenna is described which includes a radiator element coupled to a feed point through at least two different current paths. The current paths are of different lengths to accommodate different frequency bands. To change the current paths, a feed-point switch is positioned at the antenna feed point for selectively supplying current along either a first current path or a second current path. The current paths share a majority of the radiator element so that separate radiator elements need not be used.

Abstract: An optical disc drive (ODD) includes a radio-frequency identification (RFID) reader. The reader includes a circuit and a coil antenna which has a rotational symmetry with respect to a rotation axis of a motor, shaft and turntable of the ODD. The coil antenna can be secured to a wall of a housing of the ODD or around the motor and/or shaft. The reader can read an RFID tag on an optical disc. The RFID tag includes a circuit and a coil antenna which has a rotational symmetry with respect to the disc. As a result, the RFID tag can be read while the disc is rotating. A magnetic insulating material such as a ferrite polymer composite film is used to magnetically insulate the coil antenna. An authentication code can be read from the RFID tag to control access to content of the optical disc.

Abstract: Antennas, antenna systems, and electronic devices containing antennas are described herein. Non-antenna components of electronic devices can be used as an antenna, as a portion of an antenna, or as part of a feed path from a transceiver output to an antenna. An output of a transceiver can be coupled to a conductive portion of a non-antenna component through a feed point. Conductive portions of the non-antenna component can serve as an antenna for the transceiver. An additional conductor can also be coupled to the output of the transceiver. The additional conductor, the conductive portions of the non-antenna component, or the combination of the additional conductor and the conductive portions of the non-antenna component can act as an antenna for the transceiver.

Abstract: Antennas, antenna systems, and components used in antenna systems are provided herein. In various examples, an integrated antenna for receiving signals for a plurality of functional modules in a computing device may include a first plurality of antenna elements for receiving signals at wireless communication frequencies and a second plurality of antenna elements for receiving signals at wireless charging frequencies. The first and the second pluralities of antenna elements may have at least one common antenna element, which may be coupled to one or more of the second plurality of antenna elements using at least one low-pass filter. The at least one common antenna element is de-coupled from one or more of the plurality of functional modules operating at the wireless communication frequencies using at least one high-pass filter.

Abstract: Multi-antenna systems, including mobile devices having multiple antennas, are provided herein. A first antenna and a second antenna are operable at two or more of the same non-overlapping communication frequency bands. The first antenna and the second antenna are closely spaced and have different fundamental modes of operation such that the first antenna and second antenna are substantially isolated at the two or more non-overlapping communication frequency bands. The first antenna and second antenna having different fundamental modes can be a linear antenna, such as a monopole, dipole, PIFA, or PILA, and an aperture antenna, such as a slot or loop antenna.

Abstract: Planar antennas comprise capacitively coupled antenna patches. A first antenna patch configured to radiate in a first frequency band is coupled to a transmitter/receiver. The first antenna patch is situated to capacitively couple radiation in the first frequency band and a second frequency band to second and third antenna patches, respectively. The first and second antenna patches extend antenna bandwidth in the first frequency band, and the third antenna patch is bent so that the antenna patches can be situated in a predetermined substrate area.