Antenna for a radio-controlled wristwatch

US6134188A · kind A · utility

Assignee

• Junghans Uhren GmbH · DE

Inventors

• Wolfgang Ganter · Schramberg, DE
• Reiuer Furch · Schiltach, DE
• Thomas Lechner · Tauberbischofsheim, DE
• Holger Rudolph · Dunningen, DE
• Johannes Neudecker · Erlangen, DE

Key dates

• Filing date: Aug 10, 1998
• Grant date: Oct 17, 2000
• Expiry date: Aug 10, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01Q1/273
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A radio-controlled wristwatch includes a casing, a printed circuit board disposed in the casing, and an antenna disposed in the casing. The antenna includes a core and a coil carried by the core. The core comprises a stack of soft-iron strips stacked in a direction parallel to a plane of the circuit board. The stack is arranged in a curved shape extending along and adjacent to an outer peripheral edge of the circuit board. The core is bonded to a surface of the circuit board and supports the coil within a pocket formed in the circuit board.