Appeal No. 1999-1894
Application 08/847,804
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 9, 11-20, 23, and 25-30.
Claims 1-8, 10, 21, 22, 24, and 31-33 have been canceled.
We reverse.
BACKGROUND
The disclosed invention relates to a split monopole
antenna which provides for simultaneous transmission of three
emergency frequencies of an emergency locator transmitter
(ELT).
Claim 9 is reproduced below.
9. A triple frequency antenna for use as an
emergency locator transmitter (ELT) comprising:
(a) a first radiating element electrically coupled
to said transmitter and to a first band rejection filter;
(b) a second radiating element electrically coupled
to said first rejection filter and to a second band
rejection filter;
(c) a third radiating element electrically coupled
to said second band rejection filter,
wherein said first band rejection filter resonates
at a selected resonant frequency and said first radiating
element having a length of less than a quarter wavelength
at said selected resonant frequency to radiate in a
radiation pattern at said selected resonant frequency
having an absolute gain in the vertical plane between
about -3 dBi to about +4dBi over the elevation angle from
about 10E to about 60E.
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