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:
Oct. 03, 2000
Filed:
Jan. 23, 1998
Noriyuki Fujita, Saitama, JP;
NEC Corporation, Tokyo, JP;
Abstract
Disclosed is a transmitting diversity circuit for a TDMA radio unit which has: a plurality of antennas; a plurality of transmitting circuits; a plurality of receiving circuits; a first switch which is connected with one of the plurality of transmitting circuits and selects one of the plurality of antennas; a second switch which is connected with the first switch and selects the one or the other of the plurality of transmitting circuits; a third switch which is connected with the second switch and one or more of the plurality of receiving circuits and selects one of the plurality of transmitting circuits or the one or more of the plurality of receiving circuits; a judging circuit which controls the switching of the first and second switches according to a level of received field strength to be detected by the receiving circuit connected with the third switch; wherein the one of the plurality of transmitting circuits is connected through the first to third switches with the selected one of the plurality of antennas.