Communications: directive radio wave systems and devices (e.g. – Radio wave absorber – With particular geometric configuration
Patent
1988-11-18
1990-11-27
Gensler, Paul
Communications: directive radio wave systems and devices (e.g.,
Radio wave absorber
With particular geometric configuration
333 81B, H01Q 1700, H01P 122
Patent
active
049739638
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.
REFERENCES:
patent: 2527918 (1950-10-01), Collard
patent: 2875418 (1959-02-01), Rolfs
patent: 2985880 (1961-05-01), McMillon
patent: 3124798 (1964-03-01), Zinke
patent: 3381510 (1983-04-01), Wren
patent: 4661787 (1987-04-01), Lang
Hayashi Tohimasa
Hikida Masaki
Kitakoga Yoshiyuki
Kurosawa Moriyoshi
Miyata Tsutomu
Adams Bruce L.
Gensler Paul
Seiko Instuments Inc.
Wilks Van C.
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