Communications: radio wave antennas – Antennas – With grounding structure
Reexamination Certificate
2006-02-21
2006-02-21
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
With grounding structure
C343S702000, C455S090300
Reexamination Certificate
active
07002529
ABSTRACT:
Second ground plane (18), substantially rectangular in shape, is connected to first ground plane (17) mounted with a data processing circuit, and radio communication circuit (12) makes radio communications at communication wavelength λ. A portion of second ground plane (18) from ground connecting means (14) to ground connecting means (33) along continuous edges of second ground plane (18) acts as an antenna. However, since the longest distance a between a plurality of ground connecting means (14, 33) along the continuous edges of second ground plane (18) satisfies “a<λ/2α” (where α is a coefficient equal to or larger than “1”), its resonant frequency is sufficiently higher than the communication frequency of the radio communication circuit.
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K. Fujimoto et al., “Small Antennas”, Research Studies Press, Chapter 2.4, pp. 116-151.
Imazato Masaharu
Kaku Toshio
Kuriyama Toshihide
Muramatsu Hidenori
Muramatsu Yuji
Ho Tan
Sughrue & Mion, PLLC
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