Apparatus and method for branching signal for mobile terminal
First Claim
1. A method for processing signals in a mobile terminal, comprising:
- receiving an RF signal; and
controlling a switch to route the RF signal to one of a plurality of signal processing stages, each of said signal processing stages processing signals in a respective one of a plurality of frequency bands.
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Abstract
A system and method for processing signals in a mobile terminal routes received signals to signal processing units based on the bands in which the signals are located. Routing is preferably performed by a m-pole/n-throw electric switch where m≧1 and n≧1. The signal processing units may process signals in, for example, the DCN, PCS and GPS bands although other bands are possible. By using an electric switch instead of, for example, a diplexer circuit, the system and method significantly reduces insertion loss while simultaneously increasing the degree of isolation among the different bands of the received signals. Optimal receiver sensitivity is also achieved in each respective band.
26 Citations
32 Claims
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1. A method for processing signals in a mobile terminal, comprising:
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receiving an RF signal; and
controlling a switch to route the RF signal to one of a plurality of signal processing stages, each of said signal processing stages processing signals in a respective one of a plurality of frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A signal-branching apparatus of a mobile terminal, comprising:
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an electric switch which routes an RF signal from an antenna to one of a plurality of signal processing stages, each of said signal processing stages processing signals in a respective one of a plurality of frequency bands; and
a controller which applies a band-selecting signal to the switch for controlling routing of the RF signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A signal-dividing apparatus for a mobile terminal, comprising:
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an electric switch which routes RF signals received through an antenna to at least one of a plurality of signal processors, each of said signal processors processing signals in a respective one of a plurality of frequency bands;
a controller which applies band-selecting signals for controlling the electric switch;
a DCN duplexer which separates a first one of said RF signals in a DCN band into a first receive frequency signal;
a PCS duplexer which separates a second one of said RF signals in a PCS band into a second received frequency signal; and
an RF band pass filter which receives a third one of said RF signal in a GPS band into a third received frequency signal. - View Dependent Claims (29, 30, 31, 32)
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Specification