Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2006-05-30
2006-05-30
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S702000
Reexamination Certificate
active
07053848
ABSTRACT:
An antenna device and a mobile radio communication terminal adapted for improving the performance of an antenna. The antenna device includes a radio circuit for transmitting and receiving a high-frequency signal, a notch antenna having a feeder, and a notch antenna operating through electromagnetic coupling with the notch antenna, and a substrate independent of the radio circuit with respect to high frequencies. The notch antenna includes a linear slit having a length of λ/4 and cut from one edge of the substrate on the reverse side to the position of the radio circuit. The notch antenna includes a linear slit having a length slightly shorter than λ/4 and cut in parallel with the notch antenna from the same edge thereof at a position spaced apart by a predetermined distance d from the notch antenna.
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Patent Abstracts of Japan, vol. 1995, No. 02, Mar. 31, 1995 & JP 06 314927 A (Meisei Electric Co Ltd), Nov. 8, 1994.
Kanayama Yoshiki
Sawamura Masatoshi
Shoji Hideaki
Chen Shih-Chao
Frommer William S.
Frommer & Lawrence & Haug LLP
Presson Thomas F.
Sony Ericsson Mobile Communications Japan Inc.
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