Appeal No. 1999-1894
Application 08/847,804
wavelength of the design frequency of the first trap 20"
(FR2). The Examiner relies on Dörrie.
Dörrie discloses an improvement to the known multi-band
antenna of Fenwick such that it becomes broadband and can be
used for four different frequency bands (col. 1, lines 21-40).
The antenna has a first, straight wire section 14, a first
coil 15 connected therewith, a second, straight wire section
connected therewith, a second coil 17 connected therewith, and
an adjoining third straight wire section 18 (col. 1, line 64
to col. 2, line 4). The length L1 of the first, straight wire
section 14 is 81/4, where 81 is the mean operating frequency
of the highest frequency band of, for example, 825 to 960 MHz
(col. 2, lines 16-20). The first coil 15 is a trap circuit
tuned to the mean operating wavelength 81 of the highest
frequency band (col. 2, lines 21-24) and the second coil 17 is
used for phase shifting and generates a phase shift of 135E at
the mean operating wavelength 82 of the next-highest frequency
band (col. 2, lines 30-32).
The Examiner relies on the teaching that the length L1 of
the first, straight wire section 14 is 81/4, where 81 is the
mean operating frequency of the highest frequency band of, for
- 6 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007