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:
Nov. 06, 2007
Filed:
Jan. 09, 2003
Yozo Shoji, Tokyo, JP;
Kiyoshi Hamaguchi, Tokyo, JP;
Hiroyuki Tsuji, Tokyo, JP;
Hiroyo Ogawa, Tokyo, JP;
Yozo Shoji, Tokyo, JP;
Kiyoshi Hamaguchi, Tokyo, JP;
Hiroyuki Tsuji, Tokyo, JP;
Hiroyo Ogawa, Tokyo, JP;
Abstract
A transmittertransmits from a transmission antennaa mixture signal containing a radio-frequency (RF)-band modulated signal, and a portion of power of a local oscillation signal used for frequency conversion. Meanwhile, a receiverdetects the transmitted signal by means of a reception antenna-detection section. In the reception antenna-detection section, a plurality of base unit reception circuitsare disposed. Each base unit reception circuitincludes a planar printed antennasuch as a patch antenna, an amplifier circuitformed on a very small planar circuit by means of an MMIC technique, and a mixer circuitserving as a square-law detector. Respective outputs of the base unit reception circuitsare power-mixed and fed to the IF signal demodulation section. The IF signal demodulation sectiondemodulate reception data. This configuration enables realization of a reception antenna which occupies a very small space, has a detection function and a high gain, and has a wide beam characteristic comparable to that of a single-element antenna.