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. 06, 2006
Filed:
May. 22, 2000
Keiji Takakusaki, Yokohama, JP;
Keiji Takakusaki, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Baseband signal generatoroutputs a transmission baseband signal with a coefficient for setting antenna directivity multiplied and a gain control signal to transmit power amplifierand transmit power amplifieramplifies the transmission baseband signal with a gain corresponding to the gain control signal and transmits the signal from antenna. ATTattenuates the output signal of amplifieraccording to the gain control signal, amplitude/phase comparatorcalculates amplitude and phase errors between the attenuated signal with a frequency equalized by frequency conversion sectionsandand the input signal of amplifierand phase/amplitude correction sectioncorrects the transmission baseband signal and gain control signal so as to eliminate the errors. This makes it possible to correct the amplitude and phase shifts of the transmission signal during a communication with other apparatuses and reduce the size and cost of the apparatus.