Telefonaktiebolaget Lm Ericsson (publ)

Yinggang Li

Mingquan Bao

Ola Ragnar Tageman

Mikael Hörberg

Mats Rydström

Harald Jacobsson

Dan Rutger Weinholt

Thomas Lewin

Ola Tageman

Bing Zhang

Dan Weinholt

The present invention relates to a metalized waveguide interface () for providing a galvanically isolated waveguide connection for a propagating signal, between a standardized waveguide () and a, to the standardized waveguide non-compatible, metalized chip-level waveguide (). The metalized waveguide interface () is configured such that a first open-ended quarter wavelength waveguide () and a second open-ended quarter wavelength waveguide () is obtained along the directions dand d, respectively, when the metalized chip-level waveguide () is mounted on the support surface (). The interface is further configured such that third open-ended quarter wavelength waveguide () is obtained between the third surface portion () and the metalized chip-level waveguide () when the metalized chip-level waveguide () is mounted on the support surface (). The interface () further comprises a trench such that a short-circuit half wavelength waveguide () is obtained when the metalized chip-level waveguide () is mounted on the support surface ().

Waveguide interface and non-galvanic waveguide transition for microcircuits

Frequency multipliers () for generating a differential output signal from a single-ended input signal are disclosed. The frequency multiplier comprises a single-ended input (P(f)) to receive the input signal with a frequency of fand differential outputs (+/−P(2nf)) to provide the differential output signals. The frequency multiplier further comprises a first signal branch () connected to the single-ended input and one of the differential outputs (+P(2nf)). The first signal branch comprises a first low pass or bandpass filter with a center frequency of f(L/BPF), a first nonlinear component (NC) and a first high pass or bandpass filter with a center frequency of 2nf(H/BPF). The frequency multiplier further comprises a second signal branch connected to the single-end input and another one of the differential outputs (−P(2nf)). The second signal branch comprises a second low pass or bandpass filter with a center frequency of f(L/BPF), a second nonlinear component (NC) and a second high pass or bandpass filter with a center frequency of 2nf(H/BPF). The first and second nonlinear components are configured such that even-order harmonics generated in the first and second nonlinear components are in anti-phase, thereby the differential output signals with a frequency of 2n times the frequency of the input signal are generated at the differential output, where n is an integer number.

Frequency multiplier with balun function

An active antenna () comprising a driving loop with first () and second () sections, each of which extends between end points. Each end point of each section () is connected to the closest end point of the other section by a reflection amplifier (). One reflection amplifier () comprises differential ports for signals to/from the active antenna. The active antenna also comprises a passive loop with first () and second () sections, each of which extends between end points. Each end point of each section () is connected to the closest end point of the other section by a reflection amplifier (). The driving loop and the passive loop extend in parallel to each other and the first and the second section () of each of the loops form separated complementary parts of a closed geometrical shape and are built in open waveguide technology.

Active antenna

A frequency converter () comprising a first mixer () arranged to receive a first and a second input signal and to have as its output the sum and the difference of the first and second input signals. The frequency converter () also comprises generating means () for generating the second input signal and for receiving the output signal of the first mixer () and multiplying it by a signal at a frequency which is two times the frequency of the second input signal, thereby generating a product. The frequency converter () also comprises adding means () for obtaining the sum of this product and the output signal from the first mixer.

Frequency converter

A duplex unit allowing simultaneous transmission and reception of microwave signals on at least partly overlapping frequency bands, comprising an interference canceller unit and a control unit, the duplex unit being arranged to receive a transmit signal and to output a first part of the transmit signal at an antenna port, the duplex unit further being arranged to receive a receive signal comprising a payload signal at the antenna port, and to output a combination of the receive signal and a filtered transmit signal as an interference suppressed receive signal of the duplex unit.

Duplex unit

Embodiments of the present invention relate to a self injection locked voltage controlled oscillator arrangement, a pair of coupled first and second voltage controlled oscillator devices are arranged on a chip, an amplifier device is arranged on the same of the refection type chip, and an off-chip delay line is arranged with one terminal connected to an output terminal of the coupled first and second voltage controlled oscillator devices, and on terminal adapted to reflect a signal from the output terminal, the amplifier device being arranged to amplify an injection signal from said output terminal and to supply the amplified injection signal to one of said first and second voltage controlled oscillation devices to provide a VCO arrangement that exhibits low phase noise and a small size.

Method and arrangement for voltage controlled oscillator device

A combination mixer arrangement comprising a first mixer and a second mixer coupled in parallel between first and second input ports and an output port. The mixers are arranged to be driven simultaneously by an input signal provided at the second input port. They are de-coupled, so a bias voltage applied at the first input port provides dc bias simultaneously for the mixers to enable gain expansion of the first mixer responsive to an increase in said input signal and thereby an improved linearity for the combination mixer arrangement.

Method and arrangement for a linear mixer

In a voltage controlled oscillator circuit comprising two transistors, the first terminals of each said two transistors, are coupled together and to a supply voltage, two interconnected resonator units, and each of said two resonator units couples a respective second terminal of said two transistors to third terminals of both said transistors.

Method and arrangement for a voltage controlled oscillator circuit

The present invention relates to a voltage-to-current transconductance stage arrangement comprising a single-ended input, an emitter-coupled pair of transistors, comprising a first transistor and a second transistor, the emitter of a third transistor, being connected to the collector of said first transistor, and differential output. It further comprises at least one common-collector transistor comprising a fourth transistor connected to the base of said second transistor preferably or optionally also and a fifth transistor connected to the base of said third transistor. The size of said fourth, or fourth and fifth transistors considerably exceed the sizes of said second and third transistors. They are biased at 'off-state'. An extra inductor at the collector of the transistor may be applied to further increase linearity.

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Askim, Sweden

Yinggang Li