Radio frequency device

Abstract

A radio frequency device is disclosed. A transition unit (1) providing a radio frequency signal transition between a radio frequency hollow waveguide system (2) and a planar transmission line (3) comprises two or more transition sections of transmission line (3) that are arranged adjacent to each other at a first surface (14) of the first substrate layer (4) of a substrate layer arrangement (15).The hollow waveguide system (2) comprises a distribution section wherein one input waveguide (5) is separated into one dedicated output waveguide (10) for each of the transition sections. For each ofthe transition sections of the transmission lines (3) a corresponding end section (11) of a respective output waveguide (10) is directed perpendicular to the first surface (14) of the first substratelayer (4). For each end section (11) an open end of the end section (11) of the waveguide system (2) superposes the corresponding transition section, and the two or more end sections (11) of the waveguide system (2) are arranged adjacent to each other in order to provide for favorable boundary conditions for electromagnetic wave propagation that result in reduced radio frequency signal power leakage from the transition unit (1) when compared to a transition unit with only one single end section (11) of the waveguide system (2).

Description

technical field [0001] The invention relates to a radio frequency device having a transfer unit providing radio frequency signal transfer between a radio frequency hollow waveguide system and a flat transmission line, the radio frequency device comprising a substrate arrangement having a a flat transmission line on the first surface of the base layer, whereby the transfer unit comprises a transfer section of the transmission line configured as a radio frequency signal transfer pattern, and whereby the transfer unit further comprises an end section of a waveguide system for radio frequency electromagnetic waves, The end section is attached to the base layer arrangement and overlays the radio frequency signal transfer pattern. Background technique [0002] Several applications for electromagnetic waves and corresponding signals require low loss transmission or low loss distribution of radio frequency signals, and many applications require both. Hollow waveguides are generally...

AI Technical Summary

Problems solved by technology

[0003] Although several possibilities for transitions between hollow waveguides and flat transmission lines are known from the literature, they are subject to detrimental properties and constraints

Typically, such transfers suffer from bandwidth limitations

In many cases, known transfers require vias in the substrate layer, which is not only costly but also not easily applicable to all substrate technologies used (e.g. multilayer glazing)

They are also rather bulky, which limits their application to single transfers or multiple transfers that are geometrically well separated

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