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TW362306B - Thin-type of receiver and transmitter apparatus - Google Patents

Thin-type of receiver and transmitter apparatus

Info

Publication number
TW362306B
TW362306B TW085115218A TW85115218A TW362306B TW 362306 B TW362306 B TW 362306B TW 085115218 A TW085115218 A TW 085115218A TW 85115218 A TW85115218 A TW 85115218A TW 362306 B TW362306 B TW 362306B
Authority
TW
Taiwan
Prior art keywords
capacitors
apexes
joints
absorb
substrate
Prior art date
Application number
TW085115218A
Other languages
Chinese (zh)
Inventor
Yasuhiro Ishizaki
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of TW362306B publication Critical patent/TW362306B/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Support Of Aerials (AREA)
  • Burglar Alarm Systems (AREA)
  • Transmitters (AREA)
  • Details Of Aerials (AREA)

Abstract

The invention is to bypass or absorb the generated parasitic capacitor when approaching the human body to eliminate the alternation of oscillation frequency of loop antenna. The looped wiring is formed as various, round or elliptical shapes and to allocate the capacitors on each edge, apexes, or the joints of the frame. At the specified oscillating frequency, the impedance between the apexes and joints of parasitic capacitors is made to 0. And, by allocating the looped wires on both sides of substrate and forming the opposed faces conductors on the short edges on substrate to construct the capacitor and absorb the parasitic capacitors on the short edges.
TW085115218A 1995-12-22 1996-12-09 Thin-type of receiver and transmitter apparatus TW362306B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7335182A JP3046233B2 (en) 1995-12-22 1995-12-22 Thin receiver and transmitter

Publications (1)

Publication Number Publication Date
TW362306B true TW362306B (en) 1999-06-21

Family

ID=18285681

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085115218A TW362306B (en) 1995-12-22 1996-12-09 Thin-type of receiver and transmitter apparatus

Country Status (5)

Country Link
JP (1) JP3046233B2 (en)
CN (1) CN1084937C (en)
FI (1) FI965170L (en)
GB (1) GB2308745B (en)
TW (1) TW362306B (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9806612D0 (en) * 1998-03-28 1998-05-27 Philips Electronics Nv Communication device
JP3643488B2 (en) * 1998-10-30 2005-04-27 株式会社日立製作所 IC card
NO313975B1 (en) * 2000-02-08 2003-01-06 Q Free Asa Antenna for transponder
GB0115023D0 (en) * 2001-06-20 2001-08-08 Univ Belfast Improvements relating to antennas
JP2004013427A (en) 2002-06-05 2004-01-15 Toshiba Corp Radio card
US7421973B2 (en) 2003-11-06 2008-09-09 Axcelis Technologies, Inc. System and method for performing SIMOX implants using an ion shower
US7748344B2 (en) * 2003-11-06 2010-07-06 Axcelis Technologies, Inc. Segmented resonant antenna for radio frequency inductively coupled plasmas
JP3790249B2 (en) 2004-01-13 2006-06-28 株式会社東芝 Loop antenna and wireless communication device equipped with loop antenna
US7239290B2 (en) 2004-09-14 2007-07-03 Kyocera Wireless Corp. Systems and methods for a capacitively-loaded loop antenna
US20080048867A1 (en) * 2006-01-18 2008-02-28 Oliver Ronald A Discontinuous-Loop RFID Reader Antenna And Methods
USD570337S1 (en) 2006-08-25 2008-06-03 Impinj, Inc. Broken-loop RFID reader antenna for near field and far field UHF RFID tags
DE602007014410D1 (en) * 2007-01-12 2011-06-16 Aida Ct S L OWN RESONANT ELECTRIC SMALL ANTENNA
JP4894923B2 (en) 2007-06-29 2012-03-14 富士通株式会社 Loop antenna
MX2010002672A (en) * 2007-09-06 2010-06-01 Deka Products Lp Rfid system and method.
KR100906915B1 (en) * 2007-10-15 2009-07-08 엘지이노텍 주식회사 antenna
DE202007015189U1 (en) * 2007-10-31 2009-03-12 Kiontke, Siegfried, Dr. Low frequency magnetic broadband antenna
JP4314591B2 (en) * 2007-12-11 2009-08-19 日立化成工業株式会社 IC card
JP4314592B2 (en) * 2007-12-11 2009-08-19 日立化成工業株式会社 IC card
JP2008090863A (en) * 2007-12-11 2008-04-17 Hitachi Chem Co Ltd Ic card
JP4556002B2 (en) * 2008-10-14 2010-10-06 日立化成工業株式会社 Non-contact IC card
JP2010277609A (en) * 2010-09-01 2010-12-09 Hitachi Chem Co Ltd Ic card
DE212020000747U1 (en) * 2020-04-27 2022-06-16 Murata Manufacturing Co., Ltd Antenna device and RFID tag communication device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004228A (en) * 1974-04-29 1977-01-18 Integrated Electronics, Ltd. Portable transmitter
GB2100063B (en) * 1981-06-05 1985-03-13 Tokyo Shibaura Electric Co Antenna
JPH0777324B2 (en) * 1988-03-23 1995-08-16 セイコーエプソン株式会社 Wrist-worn radio

Also Published As

Publication number Publication date
GB2308745A (en) 1997-07-02
GB2308745B (en) 1997-12-10
JPH09181520A (en) 1997-07-11
FI965170A0 (en) 1996-12-20
CN1158014A (en) 1997-08-27
FI965170L (en) 1997-06-23
JP3046233B2 (en) 2000-05-29
CN1084937C (en) 2002-05-15
GB9625970D0 (en) 1997-01-29

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