Patent application number | Description | Published |
20080204318 | Antenna System for Sharing of Operation - An antenna system for sharing of operation employs contiguous transmit frequencies. Transmit frequencies are separated into non-contiguous sub-groups isolated from one another by filters | 08-28-2008 |
20080211716 | Phased Array Antenna System with Variable Electrical Tilt - A phased array antenna system with variable electrical tilt comprises an array of antenna elements etc. incorporating a divider dividing a radio frequency (RF) carrier signal into two signals between which a phase shifter introduces a variable phase shift. A phase to power converter converts the phase shifted signals into signals with powers dependent on the phase shift. Power splitters divide the converted signals into two sets of divided signals with total number equal to the number of antenna elements in the array. Power to phase converters etc. combine pairs of divided signals from different power splitters this provides vector sum and difference components with appropriate phase for supply to respective pairs of antenna elements etc. located equidistant from an array centre. Adjustment of the phase shift provided by phase shifter changes the angle of electrical tilt of the antenna array. | 09-04-2008 |
20080293451 | Sectorisation of Cellular Radio - An antenna installation for cellular radio has four antennas ANT | 11-27-2008 |
20090058725 | Phased Array Antenna System with Multiple Beam - A phased array antenna system with multiple beams incorporates a CDMA base station ( | 03-05-2009 |
20090066595 | Diversity Antenna System with Electrical Tilt - A diversity antenna system with electrical tilt has two dual polarised, tilt adjustable antenna stacks ( | 03-12-2009 |
20090075701 | Mobile Radio Base Station - A mobile-radio base station for a telecommunications system includes vector modulator means for independently controlling the phase and/or amplitude of a plurality of component signals representative of the signal to be transmitted or received, such that when these signals pass through a plurality of antenna elements, a beam is formed in a direction according to the phase relationship of the component signals. The invention also includes interface means allowing other base stations to be coupled to the same antenna, with each base station having independent control of its beam direction. Provision is includes for phase compensation of the signals to correct for errors introduced by unequal and variable component signal path lengths between the base station and the antenna. The vector modulator means is arranged to operate at low power levels, where it can operate more efficiently. | 03-19-2009 |
20100144289 | ELECTRICALLY TILTED ANTENNA SYSTEM WITH POLARISATION DIVERSITY - An electrically tilted antenna system with polarisation diversity has a dual polarised, tilt adjustable antenna ( | 06-10-2010 |