公开(公告)号：JPH1188030A

公开(公告)日：1999-03-30

申请号：JP18853798

申请日：1998-07-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BUSKING ERIK B ,  VAN NEE RICHARD D J

IPC: H01Q3/38 ,  H01Q3/26 ,  H04B7/08

Abstract: PROBLEM TO BE SOLVED: To provide an antenna array system which reduces the cost of a radio receiver and improves ability by connecting antenna signals from a different antenna through the use of at least one delay line in the radio frequency route of an antenna. SOLUTION: The different antennas 14a and 14b having spatial separation and/or different polarized waves are contained in the antenna array system 12. A coupler 16 connects the signals from the different antennas 14a and 14b by using the delay line 22. The antenna signals are connected in a radio frequency area before A/D conversion by an analogdigital(A/D) converter 18 in the remaining part 20 of the receiver 10. The antenna 14b is connected to the delay line 22. The delay line 22 is set so that it brings the delay phase rotation of the center frequency of a channel to be received. The delay line 22 is set to the delay phase rotation of 0, 90, 180 and 270 degrees, or the delay line 22 can be set to different phase rotation, for example.

公开(公告)号：JPH1174812A

公开(公告)日：1999-03-16

申请号：JP16978898

申请日：1998-06-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BUSKING ERIK B

IPC: H03D7/14 ,  H04B1/10 ,  H04B1/18 ,  H04B1/26

Abstract: PROBLEM TO BE SOLVED: To realize a communication system that employs a variable filter band width where distortion to use a switch to send a signal to various filters is not almost caused. SOLUTION: A communication system 10 is provided with a 1st mixer circuit 20 that receives a communication signal and shifts its frequency range to a 1st frequency range, a 2nd mixer circuit 22 that receives the communication signal and shifts its frequency range to a 2nd frequency range, an activating circuit 18 connecting to the mixer circuits 20, 22 and activating either of them, and plural filter circuits 28, 30 that are set to receive a signal from the mixer circuits when the corresponding mixer circuit is activated. A gilbert cell is realized for the mixer circuit, for example. In this case, upon the receipt of an activating signal, each Gilbert cell is set to be active.