US 2009/0256648 A1 · DC and/or AF Output From an Rf Path

Abstract

An improved DC and/or audio-frequency output for RF paths has the following features: an earth connection is provided, in particular in the form of an electrically conductive housing (17), an output path (13) branches off from a connection point (117, 117′) on an RF path (3, 5), the output path (13) comprises a branch line (7, 9), originating from the connection point (117, 117′), in the form of a λ/4 line, where λ represents a wavelength which corresponds to a wavelength within the RF band to be transmitted on the RF path (3, 5), and having a capacitor device (27a, 27b), which is connected to the branch line (7, 9), in the form of a low-pass filter and/or an RF short, with at least one sealed dipole connection (127a, 127h) also being provided on the output path (13), in addition to the at least one capacitor device (27a, 27b).

Claims15

Dependent claims

A direct voltage and/or audio-frequency output for RF paths, in RF apparatuses such as radio frequency filters, duplexers, comprising

an earth connection an electrically conductive housing is provided, which can be connected to earth,
an output path branches from a connecting point on an RF path,
the output path comprises, proceeding from the connecting point,
a branch line in the form of a transformation line, for the electrical length of which
L=λ/4+nλ/2±<λ/8,
applies, wherein λ represents a wavelength, which corresponds to a wavelength inside the RF band to be transmitted on the RF path and n represents one of the following numbers n=0, 1, 2, 3 etc., and
having a capacitor device adjoining the branch line, in the form of a low-pass filter and/or an RF short, and
at least one blocking pot further provided on the output path and in addition to the at least one capacitor device.

5 more elements

Dependencies are inferred from the claim text.

DC and/or AF Output From an Rf Path

Life of this patent

DC and/or AF Output From an Rf Path

Life of this patent

Abstract

Claims15