Noise suppression structure
US9225049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Jul 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09618
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A noise suppression structure for suppressing an undesired high-frequency current in a transmission line (i.e. a sleeve) of a short-circuited termination type includes a conductor base encompassing the periphery of the transmission line and a conductor short-circuiting part which is connected to the transmission line at the opposite side to an open end of the conductor base and whose inductance is greater than that of the conductor base. It is possible to increase an inductance by modifying the shape of the terminal end of the sleeve, equivalent to a quarter wavelength of an undesired high-frequency current which occurs in a wireless circuit of a mobile wireless terminal and flows through a ground layer, thus reducing the entire length and realizing miniaturization while securing desired input impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.