公开(公告)号：JP2000252710A

公开(公告)日：2000-09-14

申请号：JP2000048693

申请日：2000-02-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BOWEN JOHN WAYNE ,  FRATTI ROGER A ,  WEST MELVIN

IPC: H03H7/42 ,  H01P5/10

Abstract: PROBLEM TO BE SOLVED: To improve a device for actualizing a transmission line balance-to- unbalance transformer which supplies a single end output signal from a couple of difference input signals by crossing and coupling components of a couple of transmission line signal couplers tandem. SOLUTION: The transformer is composed of 1st and 2nd transmission line signal couplers which have coupling characteristics, respectively, and those couplers are electrically insulated from each other. Those couplers include transmission line elements which are coupled tandem with each other through specific signal phase adjustment and total improved coupling characteristics are provided for the coupling characteristics of the 1st and 2nd signal couplers. For example, this transformer has a coupler C1 connected to a couple of input ports P1 and P2, which are coupled with input ends 1 and 5 of microwave transmission line elements a1 and a2. The output ends 2 and 6 of the elements a1 and a2 are crossed and coupled tandem with the input ends 7 and 3 of transmission line elements b1 and b2 by electric connections 10 and 11.

公开(公告)号：DE60037550T2

公开(公告)日：2009-01-08

申请号：DE60037550

申请日：2000-02-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FRATTI ROGER ANTHONY ,  BOWEN JOHN WAYNE ,  WEST MELVIN

IPC: H01P5/10 ,  H03H7/42

Abstract: A transmission line balun transformer for providing a single ended output signal (at P3) from a pair of differential input signals (at P1, P2) includes two transmission line signal couplers (C1, C2). The couplers are individually designed to be relatively loosely coupled devices, i.e. having a coupling factor greater than 3dB, but are coupled together with proper phase relationships so as to achieve a relatively tighter composite coupling characteristic in the order of 3dB, thereby resulting in an increase in bandwidth.

公开(公告)号：DE60037550D1

公开(公告)日：2008-02-07

申请号：DE60037550

申请日：2000-02-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FRATTI ROGER ANTHONY ,  BOWEN JOHN WAYNE ,  WEST MELVIN

IPC: H01P5/10 ,  H03H7/42

Abstract: A transmission line balun transformer for providing a single ended output signal (at P3) from a pair of differential input signals (at P1, P2) includes two transmission line signal couplers (C1, C2). The couplers are individually designed to be relatively loosely coupled devices, i.e. having a coupling factor greater than 3dB, but are coupled together with proper phase relationships so as to achieve a relatively tighter composite coupling characteristic in the order of 3dB, thereby resulting in an increase in bandwidth.