Compact balun for rejecting common mode electromagnetic fields
US6946880B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A space-efficient broadband balun (20). The balun (20) includes a first mechanism (44, 80, 82, 94, 96) for receiving an input signal (52, 54) having an undesirable component. A second mechanism (50) rejects the undesirable component via a waveguide transition (50). In a specific embodiment, the undesirable component is a common mode component. The first mechanism (44) includes an input microstrip waveguide (44). The waveguide transition (50) is a single microstrip-to-slotline transition (50) from the input microstrip waveguide (44) and to a slotline (32) in a ground plane (34, 36) of the microstrip waveguide (44). The slotline (32) is terminated at a first end (38) via a wedge (40) in the ground plane (34, 46). A second end (42) of the slotline (32) provides an output of the balun (20). The input signal (52, 54) includes a first input signal (52) and a second input signal (54), which are input at opposite ends (38, 42) of the input microstrip waveguide (44). The first input signal (52) and the second input signal (54) have a desired differential mode component and an undesired common mode component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.