N-port receiver with rf/lo isolation

Details N-port receiver with rf/lo isolation N-port receiver with rf/lo isolation

H - Electricity

04

B

H04B 1/26 (2006.01) H03D 3/00 (2006.01)

Patent

CA 2310424

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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