Appeal No. 2003-2072
Application No. 09/735,439
indeed allow passage of microwave signals in the frequency range
of 30Mz to 35 Ghz range. We note that this is taught in Hamano
Figure 14 which shows a graph of the frequency characteristics of
the low-pass filter.
We note that Miyata teaches a microwave switch. See page 1
of Miyata. We further find that Hamano teaches a filter circuit
that would be used in radio communications using high speed
signals of several gigabits per second, in other words in the
microwave range. See Hamano, column 1, lines 5-17. Hamano
further teaches that for microwave communication systems, there
is often time a need for a low-pass filter to suppress the high
frequency noise induced in the communication system. See column
1, lines 10-22. Therefore, we find that Hamano would have
suggested to those skilled in the art to use Hamano's low-pass
filter shown in Figure 10 in the Miyata microwave switch as
proposed by the Examiner in order to provide a signal free from
higher frequency noise.
In view of the foregoing, we have sustained the Examiner's
rejection of claims 1 and 4 under 35 U.S.C. § 103 as being
unpatentable in view of the Examiner's proposed combination of
Miyata and Hamano.
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