Abstract: It is presented an amplifier device comprising: a primary amplifier arranged to receive at least part of an input signal; a secondary amplifier arranged to receive at least part of the input signal; a first directional coupler device, wherein one input of the first directional coupler device is connected to the primary amplifier and a second input of the first directional coupler device is connected to the secondary amplifier; and a first multiband termination device arranged to reflect signals with a predetermined reflection phase in at least two frequency bands. One output of the first directional coupler device is a main output of the amplifier device and a second output of the first directional coupler device is connected to the first multiband termination device. A corresponding radio base station and mobile communication terminal are also presented.

Abstract: Harmonic control apparatus of radio frequency (RF) devices are provided including an active device. In particular, the harmonic control apparatus includes a complementary open-loop resonator that is integrated in a conducting pattern of the harmonic control apparatus, to produce a shunt resonator that is configured to act as a short-circuit termination on at least one tuned frequency.

Abstract: The present invention relates to a device for adjusting the beam direction of a beam radiated from a stationary array of antenna elements, wherein at least two antenna element feed points are coupled to a common signal source via a feed line structure having a source connection terminal to be connected to said source and at least two feed connection terminals to be connected to said antenna element feed points, said feed line structure being at a distance from and in parallel to a fixed ground plane on at least one side of said feed line structure, wherein a movable element is located adjacent to said feed line structure so as to change the signal phase of signal components being transferred between said source connection terminal and the respective feed connection terminals, said movable element being movable for effecting a controlled phase shift of said signal components so as to adjust said beam direction.

Abstract: The present invention relates to a device for adjusting the beam direction of an antenna. The device has a source connection terminal to be connected to a signal source and at least two feed connection terminals to be connected to antenna element feed points. A feed line structure is elongated in a main direction at a distance from and in parallel to a fixed ground plane on at least one side of said feed line structure, wherein a movable dielectric element is located between said feed line structure and said ground plane so as to change the signal phase of signal components being transferred between said source connection terminal and the respective feed connection terminals. The device includes means for allowing said ground plane to be positioned relatively close to said feed line structure without risking accidental contact between said feed line structure and said ground plane.

Abstract: A tuning assembly for tuning the resonant frequency of a dielectric resonator in a cavity. The assembly includes a first resonator body (21) secured to a tubular sleeve portion (33) mounted in an opening (14a) of a mounting wall (14). The sleeve portion (33) is spring loaded so as to exert a clamping force on the first resonator body (21). A second resonator body (22) is secured to a shaft (35) which is journalled inside the tubular sleeve portion (31). The tubular sleeve portion (33) and the shaft (35) are axially slidable in relation to each other, whereby the position of one of the resonator bodies (22) is precisely adjustable in relation to the other resonator body (21).