Patent application number | Description | Published |
20090153423 | WIRELESS COMMUNICATION DEVICE WITH A MULTI-BAND ANTENNA SYSTEM - Disclosed is an apparatus for a wireless communication device | 06-18-2009 |
20090219214 | WIRELESS HANDSET WITH IMPROVED HEARING AID COMPATIBILITY - A “candy bar” form factor wireless handset ( | 09-03-2009 |
20100033380 | Multi-Band Low Profile Antenna With Low Band Differential Mode - An antenna assembly includes a ground plane and an element coupled to the ground plane. The element has a center point, a first element portion extending away from the center point on a first side of the center point for a first distance in a first direction, bending at a first approximately 180 degree bend, extending towards the center point for a second distance in a second direction, bending at a second approximately 180 degree bend, and extending away from the center point for a third distance in the first direction. The element also has a second element portion provided on a second side of the center point opposite the first element portion on the first side of the center point, the second element portion being substantially a mirror image of the first element portion. The element also includes a ground leg located on the first side of the center point a first distance from the center point, extending substantially perpendicular to the first and second element portions, and coupling the element to the ground plane and a feed leg located on the second side of the center point a second distance from the center point, the feed leg extending substantially parallel to the ground leg. | 02-11-2010 |
20110254755 | MULTIBAND MULTIFILAR ANTENNA - Multi-band quadrifilar antennas that are suitable for satellite communication include composite elements each of which include multiple conductors operating at different frequencies connected to a bus bar. Each composite element is coupled to a signal feed and to a ground structure. | 10-20-2011 |
20120139810 | MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) ANTENNA SYSTEM - An antenna system includes a multi-port antenna with an active feeding network coupled thereto. The active feeding network applies complex weights to signals received from and transmitted to each port of the multi-port antenna. The complex weights are applied according to eigenvectors corresponding to a Hermitian matrix representation of the multi-port antenna. The Hermitian matrix may be base on such multi-port antenna parameters such as power dissipation, power radiation, real-power flow, volumetric storage of electromagnetic energy, and/or volumetric dissipation of electromagnetic energy. The multi-port antenna yields orthogonal electromagnetic fields in volumes or surfaces of interest in response to the active feeding network excitation. | 06-07-2012 |
20120280884 | CO-AXIAL QUADRIFILAR ANTENNA - Antennas that include an inner set of four helical antenna elements and a co-axially arranged outer set of four helical antenna elements. The helical winding directions of the two sets of elements may have the same handedness or opposite handedness. Certain embodiments provide for switch handedness of circularly polarized radiation of the antennas and certain embodiments provide for shifting the directivity of the antenna pattern in polar angle. Systems in which the antennas are used and methods of use are also taught. | 11-08-2012 |
20130035044 | EFFICIENT FRONT END AND ANTENNA IMPLEMENTATION - A tightly integrated combined transmit and receive dual quadrifilar antenna is provided. The antenna comprises four helical transmit elements and four helical receive elements disposed about a common axis. A receiver front end includes an arrangement of two 90 degree hybrids which serve to effectively reject signals cross coupled from the transmit elements back into the receive elements, while still allowing the receiver to receive signals. | 02-07-2013 |
20130120195 | ANTENNA SYSTEM FOR HANDHELD SATELLITE COMMUNICATION DEVICES - An antenna systems for a handheld wireless device comprises an antenna disposed proximate an oblong ground structure (e.g., oblong PCB). The antenna is suitably adapted to radiated circularly polarized waves by supporting quadrature phased first and second resonances which are associated with electrical fields oriented at right angles to each other and at an oblique angle relative to a longitudinal axis of the oblong ground structure. | 05-16-2013 |
20130207871 | Compact multi-band antenna with integrating fed through co-axial cable - An antenna system comprises an antenna that integrates a separate fed through coaxial cable as part of its resonant structure. The fed through coaxial cable is used to feed a second antenna. This design allows for the antenna and the fed through cable to be accommodated in a very limited space at the edge of a handheld electronic device. | 08-15-2013 |
20140253410 | MULTI-MODE, MULTI-BAND ANTENNA - A multi-mode, multi-band antenna system for a handheld wireless device includes a Quadrafilar Helix Antenna (QHA) that radiates circularly polarized waves is fed by a co-axial cable. The co-axial cable is also used in combination with the QHA as a monopole antenna. Because of the distinct electromagnetic field patterns of the QHA versus the combination of the QHA and the co-axial cable operating as a monopole antenna, the cross coupling between the two modes is low. In certain embodiments the co-axial cable can itself be formed into a helix in order to reduce the physical length of the antenna system while maintaining an electrical length desired to supported certain frequency bands in the monopole mode. According to certain embodiments a post which also serves to increase the effective electric length of the co-axial cable and thereby support a lower frequency band is provided along the centerline of the QHA. | 09-11-2014 |
20140313073 | METHOD AND APPARATUS FOR ESTABLISHING COMMUNICATIONS WITH A SATELLITE - A mobile satellite radio equipped with a phased array antenna configures the phased array antenna in one or more non-directional operating modes in order to initially detect a signal from a communication satellite. Once a signal has been received from the satellite, frequency information determined in the course of operating in the one or more non-directional modes is used to configure the mobile satellite radio for operation in a subsequent stage when the phased array antenna is configured in a directional mode. In the subsequent stage the phased array antenna is used to scan a solid angle space to determine the direction of the satellite. Thereafter the antenna is used in the directional mode for satellite communication. | 10-23-2014 |