An ultra-wideband radio frequency (RF) apparatus for combining and/or dividing RF signals. RF apparatus includes a circuit board, a communication cable that operably engages with the circuit board, at least two transmission lines that are formed on the circuit board and operably engages with the communication cable, and at least two connectors that operably engages with the at least two transmission lines. The RF apparatus is operable in a first configuration and a second configuration. When the RF apparatus is provided in the first configuration, the RF apparatus is operable to divide a first RF signal into at least two RF signals. When the RF apparatus is provided in the second configuration, the RF apparatus is operable to combine the at least two RF signals into a second RF signal. The RF apparatus is capable of achieving a low insertion loss less than 1 dB over a bandwidth greater than 20:1.

A multi-level signal distribution device provides different enhanced isolation levels at a plurality of different frequency bands and may include an input port, a plurality of output ports, a splitter configured to be connected between the input port and the output ports and a filter. The filter is configured to provide the plurality of enhanced isolation levels between the input port and the output ports. The device is also configured to provide enhanced isolation levels between adjacent output ports and between distant output ports.

In various aspects, a radio frequency circuit is provided. The radio frequency circuit may include a substrate that may include a radio frequency front-end to antenna (RF FE-to-Ant) connector. The RF FE-to-Ant connector may include a conductor track structure and a substrate connection structure coupled to the conductor track structure. The substrate may include radio frequency front-end circuitry monolithically integrated in the substrate. The substrate connection structure may include at least one of a solderable structure, a weldable structure, or an adherable structure. The substrate connection structure may be configured to form at least one radio frequency signal interface with an antenna circuit connection structure of a substrate-external antenna circuit. The substrate may include an edge region. The substrate connection structure may be disposed in the edge region.

Receiver sensitivity deterioration in a wireless receiver section due to radio noise is reduced. A noise acquisition section acquires noise generated from a noise source. A noise adjustment section obtains a noise canceling signal by adjusting a phase and a gain of the noise acquired by the noise acquisition section. Subsequently, an antenna section transmits the noise canceling signal obtained by the noise adjustment section. For example, the noise acquisition section acquires the noise generated from the noise source by allowing the antenna section to receive the noise or acquires the noise through electrical wiring.