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. 27, 1990
Filed:
Nov. 18, 1988
Moriyoshi Kurosawa, Tokyo, JP;
Kazuo Wakabayashi, Tokyo, JP;
Tsutomu Miyata, Tokyo, JP;
Hiroyuki Tokita, Tokyo, JP;
Yoshiyuki Kitakoga, Tokyo, JP;
Yasuo Mizuno, Tokyo, JP;
Masaki Hikida, Tokyo, JP;
Tohimasa Hayashi, Tokyo, JP;
Seiko Instuments Inc., , JP;
Abstract
A plurality of waveguide elements are arranged to form an electromagnetic wave absorbing lattice in opposed relation to the advancing wave surface of the incident electromagnetic wave. Each waveguide element has a front opening on the lattice receptive of a part of the incident electromagnetic wave, a rear end portion spaced rearwardly from the front opening, and an inner peripheral surface portion extending between the front opening and the rear end portion to define a cavity effective to wave-guide the received electromagnetic wave. The inner peripheral surface portion has a given electric resistivity to effect absorption of the received electromagnetic wave during the wave-guiding thereof without substantial reflection thereof.