公开(公告)号：DE60000346D1

公开(公告)日：2002-09-26

申请号：DE60000346

申请日：2000-09-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BARNETT RON ,  KORISCH ILYA ALEXANDER ,  WU HUI

IPC: H01Q1/24 ,  H01Q9/04 ,  H01Q21/00 ,  H01Q21/06

Abstract: A high-frequency, e.g., microwave, antenna (100) is stamped from a single sheet of electromagnetically conductive material, e.g., a metal plate. A manufacture comprising a frame (104), a plurality of radiator antenna elements (108), a plurality of first supports (112) each connecting a radiator antenna element to the frame, a feed network (110) connected to the radiator antenna elements, and a plurality of second supports connecting the radiators and the feed network to each other and to the frame, are stamped out of the single sheet. A combiner (114) may be included in the manufacture as well. The second supports provide alignment and rigidity during manufacture and assembly. Preferably, a plurality of the manufactures are stamped out side-by-side from a single roll for ease of automated manufacture and assembly. The frame is either made in two pieces or is bent relative to the resonator antenna elements along fold lines, to provide an offset of the radiators from a ground plane (102). The frame is mounted on the ground plane, and the second supports are then removed. Preferably, the feed network is positioned (e.g., by being bent) to lie closer to the ground plane than the radiator antenna elements.

公开(公告)号：CA2280377A1

公开(公告)日：2000-04-06

申请号：CA2280377

申请日：1999-08-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MA ZHENGXIANG ,  RITTENHOUSE GEORGE E ,  WU HUI

IPC: H03D1/22 ,  H04B1/06 ,  H04B1/30 ,  H04B1/7097 ,  H04J13/00 ,  H04M1/30

Abstract: A single-ended homodyne receiver demodulates quadrature signals containing spectral nulls by using an extremely low intermediate-frequency that normally would create substantial self-interference. This is accomplished by judiciously placing the spectral nulls over the critical sections of the signal spectrum, ensuring that the self-interference is minimized. As an example, a direct-sequence CDMA signal that was constructed with not more than one half the available Walsh functions is demodulated directly by placing the intermediate frequency such that spectral nulls in the CDMA signal overlap the spectral peaks in the desired signal, thereby eliminating the self-interference. This single-ended homodyne receiver can be implemented using either integrated or discrete components.