The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Sep. 18, 1996
Gerhard Lohninger, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A Doppler radar module, having an operating frequency of about 2.45 GHz, is constructed in microstrip line technology and has a very small construction size. The Doppler radar module includes a planar antenna, a multilayer circuit board having a circuit for the transmission and reception of microwaves, and a housing made of metal. The planar antenna has a planar dipole whose radiating edges are shorter than their spacing from one another, and a substrate whose thickness is greater than 3 mm. This combination of the antenna and the multilayer circuit board on which the antenna is fastened, makes possible the small construction size with simultaneous excellent functional characteristics, such as high sensitivity with low transmission power and low emission of harmonics.