RF signal receiving method and circuit with high degree of signal isolation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
N/A
Issued Date -
Sep 6, 2001
app pub date -
Feb 22, 2001
filing date -
Feb 29, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A down-converting receiving method for RF signal as well as a receiving circuit implementing said method is disclosed. The method is characterized by down-converting the first and the second polarized signals by means of two harmonic mixers being used to receive the first and the second polarized signals respectively and a harmonic signal output from a local oscillator common to the two harmonic mixers; and isolating the first and the second polarized signals by means of a filter serially connected between the local oscillator and at least one of the two harmonic mixers. By means of the method disclosed, a lot of the elements to isolate two differently polarized signals are easy to design, as well as effective in obtaining a good isolating effect, even for a higher applied frequency.
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