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. 10, 2004
Filed:
Dec. 14, 2000
Kentaro Nishimori, Yokosuka, JP;
Keizo Cho, Yokohama, JP;
Yasushi Takatori, Yokohama, JP;
Toshikazu Hori, Miura, JP;
Nippon Telegraph & Telephone Corporation, Tokyo, JP;
Abstract
An adaptive array antenna transceiver apparatus provides: a local signal generator that outputs a signal having a frequency that corresponds to the difference between the reception frequency and the transmitting frequency; a coupler that separates and extracts a part of the signals from the output of the transmitters a switch that selects the signal output from any one of the transmitters a frequency converter that converts the frequency of the signal selected by the switch and a switch that inputs signals output by the frequency converter and selectively outputs them to any one of the plurality of paths. The transceiver further provides a switch that selectively inputs a reception signal from a said antenna elements or a signal from said second switch into each of said receivers; and a calibration control processor that controls the connection state of said switches inputs the amplitude and phase values obtained at the receivers and finds the calibration value of each of the branches of the array antenna.