Telecommunications – Receiver or analog modulated signal frequency converter – Cabinet – housing – or chassis structure
Patent
1995-10-03
1999-08-31
To, Doris H.
Telecommunications
Receiver or analog modulated signal frequency converter
Cabinet, housing, or chassis structure
455575, 455269, 455 381, 343702, 343746, 343767, H04B 108
Patent
active
059466103
ABSTRACT:
The invention provides a small portable radio apparatus including a slot antenna member. The slot antenna member has an improved form disposed in a casing. The casing has a curvedly bulging side edge surface. Thus, there is no useless space in the casing reducing the size of the portable radio apparatus. The slot antenna member has first and second conductive plates which form a slot groove at an outer peripheral edge of the first and second conductive plates. A short-circuiting element short-circuits the conductive plates with each other over the slot groove. A tuning capacitor element is connected to the first and second conductive plates at a position opposite to a position where the short-circuiting element is provided. The radio apparatus casing has a side portion which curvedly bulges toward an outer periphery thereof. The first and second conductive plates have central portions with openings and side portions which bulge slantingly toward outer peripheral edges thereof.
REFERENCES:
patent: 2070088 (1937-02-01), Montaruli
patent: 2507528 (1950-05-01), Kandogan
patent: 2611865 (1952-09-01), Alford
patent: 2625654 (1953-01-01), Alford
patent: 2629051 (1953-02-01), Lindenblad
patent: 3172112 (1965-03-01), Seeley
patent: 3210766 (1965-10-01), Parker
patent: 3307108 (1967-02-01), Induni
patent: 3918062 (1975-11-01), Haruki et al.
patent: 4035807 (1977-07-01), Tang et al.
patent: 4419770 (1983-12-01), Yagi et al.
patent: 4509053 (1985-04-01), Rubin et al.
patent: 4691378 (1987-09-01), Kumamoto et al.
patent: 4713808 (1987-12-01), Gaskill et al.
patent: 4736390 (1988-04-01), Ward et al.
patent: 4775866 (1988-10-01), Shibata et al.
patent: 4816838 (1989-03-01), Mizuno et al.
patent: 4817196 (1989-03-01), MacNak et al.
patent: 4862181 (1989-08-01), Ponce de Leon et al.
patent: 4862516 (1989-08-01), MacNak et al.
patent: 4873527 (1989-10-01), Tan
patent: 4884252 (1989-11-01), Teodoridis et al.
patent: 4920353 (1990-04-01), Mori et al.
patent: 4955084 (1990-09-01), Umetsu et al.
patent: 4973944 (1990-11-01), Maletta
patent: 4975711 (1990-12-01), Lee
patent: 4977614 (1990-12-01), Kurcbart
patent: 4980694 (1990-12-01), Hines
patent: 5001778 (1991-03-01), Ushiyama et al.
patent: 5007105 (1991-04-01), Kudoh et al.
patent: 5048118 (1991-09-01), Brooks et al.
patent: 5079559 (1992-01-01), Umetsu et al.
patent: 5113196 (1992-05-01), Ponce de Leon et al.
patent: 5128686 (1992-07-01), Tan et al.
patent: 5132697 (1992-07-01), Tan
patent: 5134418 (1992-07-01), Gomez et al.
patent: 5134724 (1992-07-01), Gehring et al.
patent: 5138651 (1992-08-01), Sudo
patent: 5144325 (1992-09-01), Kurcbart
patent: 5179733 (1993-01-01), Matsui
patent: 5182568 (1993-01-01), Stamps, Jr. et al.
patent: 5227804 (1993-07-01), Oda
patent: 5231407 (1993-07-01), McGirr et al.
patent: 5265265 (1993-11-01), Hama et al.
patent: 5280296 (1994-01-01), Tan et al.
patent: 5280646 (1994-01-01), Koyama et al.
patent: 5465098 (1995-11-01), Fujisawa et al.
patent: 5589840 (1996-12-01), Fujisawa
patent: 5621419 (1997-04-01), Meek et al.
Motorola Technical Developments, vol. 11, Oct. 1, 1990--"Belt Loop Antenna" by Michael Goldenberg.
Hideo Ito et al., "A Small-Loop Antenna for Pocket-Size VHF Radio Equipment," National Technical Report, vol. 19 No. 2, Apr. 1973.
K. Fujimoto et al, "Small Antennas," Research Studies Press Ltd.
Teruhiko Fujisawa et al., "A Study on Small Slot Antenna for Wrist Watch Type Portable Radio Equipment," Technical Report of IEICE.
Hall, P.S. et al., "Survey of Design Techniques for Flat profile Microwave Antennas and Arrays," The Radio and Electronic Engineer, vol. 48, No. 11, pp. 549-565, Nov. 1978.
Seiko Epson Corporation
To Doris H.
LandOfFree
Portable radio apparatus having a slot antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable radio apparatus having a slot antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable radio apparatus having a slot antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2428749