Three port structure with modulated LO signal
AssigneesSony International (Europe) GmbH, Sony Corporation
InventorsVeselin Brankovic, Dragan Krupezevic, Gerald Oberschmidt, Tino Konschak, Thomas Dölle, Hamid Amir-Alikhani, Masayoshi Abe
Life of this patent
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Abstract
A three port structure for the down conversion demodulation of a digitally modulated RF signal is proposed, wherein no RF switches are provided. The three port structure (1) has a first input (2) for the RF signal to be down converted and a second input (3) for a RF signal originating from a local oscillator (8). An output (4) of the three port structure (1) is supplied to a power sensor unit (5). The RF signal from the local oscillator (8) is modulated (7) before it is supplied to the three port structure (1).
Claims16
Three port structure for the down conversion of a modulated RF signal, the three port structure (1) having
- a first input being (2) supplied with the RF signal to be down converted,
- a second input (3) for a RF signal originating from a local oscillator (8), and
- an output (4) for supplying a signal representing a combination of the RF signals supplied to the first and second input to a power sensor unit (5),
- wherein a modulator (7) is provided for modulating the RF signal from the local oscillator (8) before supplying it to the second input (3) of the three port structure (1).
Method for the down conversion of a modulated RF signal by means of a three port structure (1),
- the method comprising the following steps:
- supplying a RF signal to be down converted to a first input (2) of the three port structure (1),
- supplying a RF signal originating from a local oscillator (8) to a second input (3) of the three port structure (1),
- combining the RF signals supplied to the first and second input in the three port structure (1), and
- outputting (4) a signal representing the result of the combination to a power sensor unit (5),
- wherein the RF signal from the local oscillator (8) is modulated (7) before it is supplied to the second input (3) of the three port structure (1).
Dependencies are inferred from the claim text.