Title:
RADIO WAVE ABSORBER
Document Type and Number:
WIPO Patent Application WO/2021/187009
Kind Code:
A1
Abstract:
A plurality of patch antennas having the same resonance frequency are arranged on a substrate. A plurality of transmission lines are connected to radiating conductors of the patch antennas, respectively. The transmission lines each have a length such that a loss caused during one reciprocation of high-frequency signals of resonance frequencies of the patch antennas becomes 20 dB or more. With this configuration, a radio wave absorber that can sufficiently absorb a radio wave even in a quasi-millimeter wave band or a millimeter wave band is provided.
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Inventors:
UEDA HIDEKI (JP)
KAWAHATA KAZUNARI (JP)
KAWAHATA KAZUNARI (JP)
Application Number:
PCT/JP2021/006457
Publication Date:
September 23, 2021
Filing Date:
February 19, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q17/00; H05K9/00
Foreign References:
| JP2007266509A | 2007-10-11 |
Other References:
V. PYNTTARI ; R. MAKINEN ; J. LILJA ; V. PEKKANEN ; P. MANSIKKAMAKI ; M. KIVIKOSKI: "Significance of Conductivity and Thickness of Thin Inkjet Printed Microstrip Lines", SIGNAL PROPAGATION ON INTERCONNECTS, 2008. SPI 2008. 12TH IEEE WORKSHOP ON, IEEE, PISCATAWAY, NJ, USA, 12 May 2008 (2008-05-12), Piscataway, NJ, USA , pages 1 - 4, XP031282826, ISBN: 978-1-4244-2317-0
NAKAJIMA ET AL.: "Microwave Engineering - Foundation and Principles", MORIKITA PUBLISHING CO., LTD., vol. 5, 15 April 1975 (1975-04-15), pages 34 - 37
NAKAJIMA ET AL.: "Microwave Engineering - Foundation and Principles", MORIKITA PUBLISHING CO., LTD., vol. 5, 15 April 1975 (1975-04-15), pages 34 - 37
Attorney, Agent or Firm:
KITAYAMA, Mikio et al. (JP)
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