N-port receiver with RF/LO isolation
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United States of America Patent
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Mar 9, 2004
Grant Date -
N/A
app pub date -
Jun 14, 2000
filing date -
Jun 16, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A RF receiver for modulated RF signals based on a N-port junction (1) providing LO/RF isolation is proposed. N thereby is an integer larger than two, such that the N-port junction (1) can be preferably a three port, four port, five port and six port junction. The N-port junction (1) supplied with a first RF signal at a first input (2) and with a second RF signal originating from a local oscillator (2) at a second input (3). An isolation block (13) comprising an active circuitry (22) is comprised in the N-port junction for isolating the second input (3) from the first input (1). Thereby can be ensured that the LO signals are significantly attenuated at the RF port (2).
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