Antenna device, array antenna device using the antenna...

Communications: radio wave antennas – Antennas – Microstrip

Reexamination Certificate

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C343S778000, C343S786000, C343S837000

Reexamination Certificate

active

07812767

ABSTRACT:
A small antenna device having an increased gain is provided. The antenna device includes a multilayer dielectric substrate composed of a combination of a plurality of dielectric layers, wherein a feeding antenna is provided in a lower layer of the multilayer substrate, a reflective metal plate is provided above the feeding antenna, and circular or rectangular metal loops are arranged so as to be of increasing diameter from lower layers toward upper layers in the plurality of dielectric layers.

REFERENCES:
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Tomohiro Seki et al., “Reflector Antenna Using Multi-Layer HTCC Substrate”, IEICE Communications Society Conference, p. 95, Sep. 8, 2004.
Seki, Tomohiro, et al., “Novel Microstrip Antenna Employing Stacked Rings on Multi-Layer Ceramic Substrate for mm-Wave Applications,” 2005 IEEE MTT-S International Microwave Symposium, Piscataway, NJ, USA, IEEE, Jun. 12, 2005, pp. 1405-1408, XP010844897, ISBN: 978-0-7803-8846-8.

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