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US 2002/0164971 A1Published application
Method and apparatus in a microwave system
OwnerDan Weinholt, Gunnar Skattinventors
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Abstract
The present invention use the properties of a TDD-transmission on a general mixer in such a manner that in the transmit mode a first RF signal is amplified in the mixer with an amplification factor greater than, or equal to, or less than one, and in the receive mode the received RF signal is mixed with a second RF signal.
Claims31
A method of operating a mixer in a transmit and a receive mode, comprising the steps of:
- in said transmit mode, providing a first RF signal to said mixer, amplifying said first RF signal, with an amplification factor greater than, or equal to, or less than one in said mixer;
- and
- in said receive mode, providing a second RF signal to said mixer, generating a received IF signal by mixing a received RF signal with said second RF signal in said mixer.
A mixer operating in a transmit and receive mode, comprising:
- a first port;
- a second port;
- a third port;
- wherein during the transmit mode, a first RF signal is connected to said first port, said second port giving an output which consists of said first RF signal amplified with an amplification factor greater than, or equal to, or less than one;
- and
- wherein during the receive mode, a second RF signal is connected to said first port and a received RF signal is connected to said second port, said mixer being adapted to mix said second RF signal with said received RF signal, and over said third port an output signal is provided which consists of an IF signal.
3 more elements
Dependencies are inferred from the claim text.