Alcatel-lucent USA Inc.

Alcatel Lucent

Huber+suhner Ag

Lucent Technologies Inc.

Jan Hesselbarth

Uhland Goebel

Peter Nuechter

Alan Michael Lyons

Erhard Mahlandt

Florian Pivit

Mischa Graeni

Daniel Stanelli

Suramate Chalermwisutkul

In order to calibrate in amplitude and phase the individual transceiver elements () of an active antenna array for a mobile telecommunications network, each transceiver element including a transmit and a receive path () coupled to an antenna element (), each transceiver element includes a comparator () for comparing phase and amplitude of transmitted or received signals with reference signals in order to adjust the characteristics of the antenna beam. In order to provide an accurate means of reference signal distribution, a feed arrangement distributes the reference signals and includes a waveguide () of a predetermined length which is terminated at one end () in order to set up a standing wave system along its length, and a plurality of coupling points () at predetermined points along the length of the waveguide, which are each coupled to a comparator of a respective transceiver element.

Calibration of active antenna arrays for mobile telecommunications

A re-entrant resonant cavityincludes a first metallized molded plastic component, which comprises a re-entrant stub, an end walland a cylindrical side wall. The componentis surface mount soldered to a metallized PCB substrate. A rostrumis located facing the end faceof the stubto define a capacitive gapwith it. The end faceof the stuband the rostrumare configured such that relative rotation between them changes the profile of the gapand hence the gap capacitance. By suitably locating the two parts during manufacture, a particular capacitance may be chosen to give a desired resonance frequency from a selection available depending on the relative angular position of the stuband rostrum. In another cavity, the rostrum is replaced by an etched metallization layer of a printed circuit board.

Re-entrant resonant cavities and method of manufacturing such cavities

A cavity resonator having temperature compensation which comprises a pot and a cover, which together enclose a cavity resonance volume. The pot comprises a first material, which has a first temperature expansion coefficient and the cover comprises a second material, which has a second temperature expansion coefficient. The second temperature expansion coefficient is greater than the first temperature expansion coefficient, and an expansion of the pot and a deformation of the cover results upon a temperature increase, which each independently and also together cause an enlargement of the cavity resonance volume. Simultaneously, the resonance frequency remains essentially constant.

Cavity resonator, use of a cavity resonator and oscillator circuit

The invention is related to cavity resonators, a method for producing a cavity resonator, and a band pass filter system comprising cavity resonators. A cavity resonator () according to the invention comprises a printed circuit-board (); an upper electrically conductive cap () having a three-dimensional structure (); and a lower electrically conductive cap () having a three-dimensional structure (). The structures of the upper cap () and the lower cap () are identical and the two caps () are mounted on opposite sides of the printed circuit-board ().

Cavity resonator having a re-entrant stub on a printed circuit board with cut-out areas

A re-entrant resonant cavity 12 includes three parts 18, 19 and 20 which may be manufactured as metallized plastic components. The three parts 18, 19 and 20 are soldered to a multilayer PCB 23 using surface mount technology. The re-entrant stub 16 is in two portions with dielectric material provided by the PCB 23 between them. The cylindrical wall 13 surrounding the stub 16 is also divided into two sections 21 and 22 by the PCB 23. Vias 24 and 25 electrically connect the parts separated by the PCB 23. The pattern of the vias 24 and 25 determines the inductance of the cavity, and hence its resonance frequency. This enables cavities with the same geometry to be operated at different resonance frequencies by using different configurations of through connects. One of the sets of vias may be omitted in some cavities.

Resonant cavities and method of manufacturing such cavities

A geometrically-structured coaxial cable may prevent infiltration of water vapor and other contaminants by using a closed cell structure. The cable may be fabricated by wrapping bubble tape around its central conductor. Alternatively, plastic may be extruded through channels to create a plurality of layers. In either case, these layers are staggered in a zig-zag pattern to ensure that no radial spokes connect the inner and outer conductors of the coaxial cable without passing through a plurality of dielectric layers.

Structured dielectric for coaxial cable

A re-entrant microwave resonant cavity comprises a stub. A cylindrical wall, first end walland the stubare integrally formed. A second end wallis defined by a metallization layerdeposited on a printed circuit board substrate. The parts are joined using surface mount soldering processes. The endof the stubdefines a gap. A rostrumfaces the end of the stub. The rostrumis manufactured separately and then fixed to the substrate. A dielectric sphereis located between the endof the probe stuband the rostrum. The dielectric spheremaintains the gap size during use and aids in correct positioning of the parts during manufacture.

Re-entrant resonant cavities, filters including such cavities and method of manufacture

An antenna () having an emitter element which is positioned in front of a conductive reflector () and has a three-dimensional cast part. The cast part is implemented as conductive and has a closed peripheral structure () having alternating constrictions and bulges. The peripheral structure () spans an imaginary surface () which is intersected by at least two planes of symmetry () of the cast part. At least two fastening elements () are provided, which extend essentially perpendicular to the imaginary surface () and support the peripheral structure () at two points which lie on one of the planes of symmetry (). At the lower ends (), the fastening elements () are connected to the reflector (), the fastening elements () also being used for electrical excitation of the emitter element.

Growing community of inventors

Zurich, Switzerland

Jan Hesselbarth