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:
Feb. 02, 1999
Filed:
Nov. 17, 1997
Osamu Ichiyoshi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A radio communication system comprises a plurality of personal terminals and a base station, the personal terminal being equipped with a non-directional antenna or a directional antenna directed to the base station, which transmits and receives a signal at an identical frequency, the base station, which establishes a communication path between the personal terminals by relaying of the signals, comprising a non-directional transmitting antenna and a receiving antenna located in such a positional relationship as to minimize the amounts of the signals coupled at the respective antennas, and feeds the received signal received by the receiving antenna to the transmitting antenna while cancelling a leakage signal from the transmitting antenna which is contained in the received signal, by using a reference signal set on a given frequency channel which may be modulated with a broadcast signal.