Antenna unit having a helical antenna as an antenna element
US6549177B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Sep 5, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an antenna unit (10) comprising a circuit board (11) having a principal surface (11a) and a back surface (11b) and an antenna element (12) mounted on the principal surface of the circuit board, a helical antenna having an axial direction extending in substantially parallel with the principal surface is used ad the antenna element (12). A shield cover (13) is added to the circuit board at the back surface (11b) so as to cover circuit elements (17) and shields the circuit elements arranged on the back surface of the circuit board. An output cable (14) is connected to the circuit elements inside the shield cover and is pulled out of the shield cover. The circuit elements include a low-noise amplifier (LNA) circuit (172).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.