A mobile radio antenna for connection to at least one mobile base station. The mobile radio antenna comprises a plurality of radiating elements and an antenna array module, which comprises at least a first housing module. The first housing module comprises a first receiving space and a second receiving space, which are separated from each other by at least one partition. A first phase shifter arrangement is situated in the first receiving space. A first duplex filter assembly is situated in the second receiving space. The at least one partition comprises a first opening, wherein a common terminal of the first duplex filter assembly is electrically or electromagnetically connected to a common terminal of the first phase shifter arrangement through the first opening. Furthermore, an antenna-side terminal of the first phase shifter arrangement is electrically connected directly or indirectly to a first terminal of at least one radiating element.

Filter devices are provided herein. A filter device includes a plurality of low-band resonators and a plurality of high-band resonators. In some embodiments, adjacent ones of the plurality of high-band resonators are spaced farther apart from each other than adjacent ones of the plurality of low-band resonators are spaced apart from each other.

A waveguide assembly is disclosed herein. In an embodiment, a waveguide assembly includes a circuit board, a housing and a waveguide filter channel. The circuit board has at least one waveguide interface formed from an electrically conductive material. The housing is configured to be attached to the circuit board so as to align with the at least one waveguide interface. The waveguide filter channel is formed between the circuit board and the housing, with the circuit board and the housing each forming at least a portion of the waveguide filter channel. The waveguide filter channel is configured to at least one of (i) receive a radio frequency signal from the at least one waveguide interface or (ii) output the radio frequency signal to the at least one waveguide interface.

Filter devices are provided herein. A filter device includes a plurality of low-band resonators and a plurality of high-band resonators. In some embodiments, adjacent ones of the plurality of high-band resonators are spaced farther apart from each other than adjacent ones of the plurality of low-band resonators are spaced apart from each other.

A band-stop filter comprises: a housing having a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity; a signal input port and a signal output port that are respectively disposed on one of the at least one side wall; a resonating element that is disposed in the internal cavity and includes a top, a bottom, and a side; and a transmission line that is disposed in the internal cavity and coupled between the signal input port and the signal output port, the transmission line comprising a coupling section that is coupled to the resonating element, wherein the coupling section is configured to surround more than half of the side of the resonating element and not directly contact the housing and the resonating element.

Filter devices are provided herein. A filter device includes a plurality of low-band resonators and a plurality of high-band resonators. In some embodiments, adjacent ones of the plurality of high-band resonators are spaced farther apart from each other than adjacent ones of the plurality of low-band resonators are spaced apart from each other.

A waveguide assembly is disclosed herein. In an embodiment, a waveguide assembly includes a circuit board, a housing and a waveguide filter channel. The circuit board has at least one waveguide interface formed from an electrically conductive material. The housing is configured to be attached to the circuit board so as to align with the at least one waveguide interface. The waveguide filter channel is formed between the circuit board and the housing, with the circuit board and the housing each forming at least a portion of the waveguide filter channel. The waveguide filter channel is configured to at least one of (i) receive a radio frequency signal from the at least one waveguide interface or (ii) output the radio frequency signal to the at least one waveguide interface.

A filter arrangement (1) comprises a filter housing (2) with a housing base (3) and housing walls (4). A cover arrangement (6) closes the filter housing (2). Resonator inner conductors (8) extend from the housing base (3) to the cover arrangement (6) and end at a distance therefrom. Each of the first resonator inner conductors (8) comprises a first and a second end (8a, 8b). The first end (8a) is galvanically connected to the housing base (3). At least one insulator assembly (15) is arranged between the second end (8b) of the respective first resonator inner conductor (8) and the cover arrangement (3). The respective first resonator inner conductor (8) is variable in length and resilient along its longitudinal axis so that the second end (8b) can be moved towards and away from the first end (8a), thereby keeping the insulator assembly (15) pressed against the cover arrangement (6).

In certain aspects, a receiver includes first amplifiers, wherein each one of the first amplifiers comprises an input and an output. The receiver also includes second amplifiers, wherein each one of the second amplifiers comprises an input and an output, and the outputs of the second amplifiers are coupled to a combining node. The receiver also includes transmission lines, wherein each one of the transmission lines is coupled between the output of a respective one of the first amplifiers and the input of a respective one of the second amplifiers. The receiver further includes a load coupled to the combining node, and receiver elements, wherein each one of the receiver elements comprises an input and an output, and the output of each one of the receiver elements is coupled to the input of a respective one of the first amplifiers.

A band-stop filter comprises: a housing having a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity; a signal input port and a signal output port that are respectively disposed on one of the at least one side wall; a resonating element that is disposed in the internal cavity and includes a top, a bottom, and a side; and a transmission line that is disposed in the internal cavity and coupled between the signal input port and the signal output port, the transmission line comprising a coupling section that is coupled to the resonating element, wherein the coupling section is configured to surround more than half of the side of the resonating element and not directly contact the housing and the resonating element.