Telefonaktiebolaget Lm Ericsson (publ)

Optis Cellular Technology, LLC

Spartak Gevorgyan

Anatoli Deleniv

Harald Jacobsson

Per Thomas Lewin

Per Ligander

Bengt-Erik Olsson

Ola Ragnar Tageman

Thomas Lewin

Arne Alping

Pierre Filhol

Vladimir Cherman

Andrei Vorobiev

A tunable chirped delay line arrangement () configured to operatively propagate a signal and includes a at least one chirped delay line () arranged along a reference direction (z) on a dielectric layer () arranged on a ground plane (). The chirped delay line () is configured with a smoothly varying width along the reference direction (z), and the arrangement () further comprising at least one electronically tunable impedance () interconnecting the at least one delay line () and the ground plane () at at least one location along the reference direction (z) such that the at least one delay line () is loaded by the tunable impedance ().

Tunable delay line arrangement

The invention discloses a photo detector with first and second groups of electrodes. The electrodes of each group are connected to a first common conductor for the group, and are located on a layer of photosensitive material. The electrodes are parallel to and interlaced with each other. The first common conductors are essentially plane, arranged at the same end of their group of electrodes, and arranged as upper and lower conductors parallel to and overlapping each other separated by a dielectric material, and form a signal electrode and a ground plane of a first microstrip line. The first microstrip line acts as a first combiner for currents induced in the electrodes of the two groups and as a matching network for the electrodes and for a load which can be connected to the photo detector.

Scalable large area photo detector with asymmetric microstrip transition

The present invention relates to a tunable microwave arrangement () comprising a waveguide arrangement and tuning elements comprising a number of varactors for tuning an electromagnetic signal input to the waveguide arrangement. It comprises a substrate (), a layered structure () comprising at least two conducting layers () and at least one dielectric layer () which are arranged in an alternating manner. The layered structure is arranged on the substrate () such that a first of said conducting layers () is closest to the substrate (). It also comprises at least one surface mounted waveguide (), a second of the conducting layers (), most distant from the substrate, being adapted to form a wall of the surface mounted waveguide (), which wall incorporates said tuning elements which are arranged to enable control of surface currents generated in said wall, hence loading the waveguide () with a tunable, controllable impedance.

Tunable microwave arrangements

A capacitance arrangement comprising at least one parallel-plate capacitor comprising a first electrode means, a dielectric layer and a second electrode means partly overlapping each other. A misalignment limit is given. Said first electrode means comprises a first and a second electrode arranged symmetrically with respect to a longitudinal axis, said first and second electrodes have a respective first edge, which face each other, are linear and parallel such that a gap is defined there between. Said second electrode means comprises a third electrode with a first section and a second section disposed on opposite sides of said gap interconnected by means of an intermediate section, which is delimited by a function depending on a first parameter and a second parameter. One of said two parameters is adapted to be selected hence allowing calculation of the other parameter to determine the shape and size of the second electrode means.

Capacitance arrangement and method relating thereto

The present invention relates to a tunable circuit, or admittance, arrangement comprising at least one capacitive branch with at least a tunable first capacitor, and tuning application means. It further comprises at least one resonant branch comprising at least a second capacitor and an inductor, said second capacitor and said inductor being connected in series. Said at least one capacitive branch and said at least one resonant branch are connected in parallel, and said tuning application means are adapted for application of a DC tuning voltage. The capacitance of said first and/or second capacitor and/or the inductance of said inductor are selected such that the frequency dependency of the tunability of a varactor arrangement forming the equivalent varactor arrangement of the admittance arrangement can be controlled at least in a selected frequency range.

Method to increase the tuneability of varactors

A lens () is disclosed for steering the exit direction (&#x3a9;) of an incident electromagnetic wave. The lens comprises a main body () of a ferroelectric material with a first main surface () and a first transformer (). The electromagnetic wave enters and exits the lens through the transformer, and the lens comprises means () for creating a DC-field in a first direction in the main body. The main body () of ferroelectric material comprises a plurality (-NN,-NN) of slabs of the ferroelectric material, each slab also comprising a first () and a second electrode of a conducting material. The means for creating a DC-field can create a gradient DC-field in the first direction using the first and second electrodes, so that the dielectric constant in the main body will also be a gradient in the first direction, thus enabling steering of the existing electromagnetic wave.

Ferroelectric lens

The invention discloses a varactor device () for improved temperature stability, comprising a first varactor () connected to a decoupling network (). The device further comprises a voltage stabilizer (), said stabilizer comprising a capacitor () and a temperature dependent capacitor (), and in that the stabilizer comprises means for connection to a DC-feed (). Suitably, the decoupling network () is connected in parallel to the first varactor (), and the capacitor () of the voltage stabilizer () is connected in parallel to the decoupling network (), the temperature dependent capacitor () of the voltage stabilizer () being connected in series to the diode of the voltage stabilizer ().

Varactor device with reduced temperature dependence

The invention discloses a tuneable resonator () with a substrate layer (), which substrate layer supports a structure with a first electrode (). In connection to the first electrode there is arranged a layer () of a material which can be brought to resonate. The resonator further comprises a second electrode () arranged in connection to said material which can be brought to resonate, and the material which can be brought to resonate is a ferroelectric material. The ferroelectric material is brought into resonance by applying an electrical field (DC, AC) between the first and the second electrode, the tuning being achieved by varying the electrical field.

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Gothenburg, Sweden

Spartak Gevorgyan