JPS5252549A - Antenna unit - Google Patents

Antenna unit

Info

Publication number
JPS5252549A
JPS5252549A JP50129488A JP12948875A JPS5252549A JP S5252549 A JPS5252549 A JP S5252549A JP 50129488 A JP50129488 A JP 50129488A JP 12948875 A JP12948875 A JP 12948875A JP S5252549 A JPS5252549 A JP S5252549A
Authority
JP
Japan
Prior art keywords
antenna unit
antenna
frequency
reactance
negated
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP50129488A
Other languages
Japanese (ja)
Inventor
Noriyuki Kawamoto
Yumio Kawai
Takeshi Miyata
Michiro Ikenishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50129488A priority Critical patent/JPS5252549A/en
Publication of JPS5252549A publication Critical patent/JPS5252549A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:The reactance element, etc. is connected in parallel to power supply point of dipole antenna. In this way, the impedance of antenna is shown at high frequency while the reactance of antenna is negated at low frequency. Thus, operation is secured with 2-frequency.
JP50129488A 1975-10-27 1975-10-27 Antenna unit Pending JPS5252549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50129488A JPS5252549A (en) 1975-10-27 1975-10-27 Antenna unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50129488A JPS5252549A (en) 1975-10-27 1975-10-27 Antenna unit

Publications (1)

Publication Number Publication Date
JPS5252549A true JPS5252549A (en) 1977-04-27

Family

ID=15010708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50129488A Pending JPS5252549A (en) 1975-10-27 1975-10-27 Antenna unit

Country Status (1)

Country Link
JP (1) JPS5252549A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758402A (en) * 1980-09-24 1982-04-08 Dx Antenna Co Ltd Loop antenna common use for two frequencies
JPS58148503A (en) * 1982-02-26 1983-09-03 Maspro Denkoh Corp Reception antenna for television signal
WO2005066889A1 (en) * 2003-12-23 2005-07-21 3M Innovative Properties Company Ultra high frequency radio frequency identification tag
JP2008072373A (en) * 2006-09-13 2008-03-27 Toa Corp Wireless microphone device
US7659863B2 (en) 2005-03-17 2010-02-09 Fujitsu Limited Tag antenna
US7847697B2 (en) 2008-02-14 2010-12-07 3M Innovative Properties Company Radio frequency identification (RFID) tag including a three-dimensional loop antenna
US8289163B2 (en) 2007-09-27 2012-10-16 3M Innovative Properties Company Signal line structure for a radio-frequency identification system
US8717244B2 (en) 2007-10-11 2014-05-06 3M Innovative Properties Company RFID tag with a modified dipole antenna
JP2016005081A (en) * 2014-06-16 2016-01-12 小島プレス工業株式会社 On-vehicle antenna

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6257123B2 (en) * 1980-09-24 1987-11-30 Dx Antenna
JPS5758402A (en) * 1980-09-24 1982-04-08 Dx Antenna Co Ltd Loop antenna common use for two frequencies
JPS58148503A (en) * 1982-02-26 1983-09-03 Maspro Denkoh Corp Reception antenna for television signal
WO2005066889A1 (en) * 2003-12-23 2005-07-21 3M Innovative Properties Company Ultra high frequency radio frequency identification tag
US6999028B2 (en) 2003-12-23 2006-02-14 3M Innovative Properties Company Ultra high frequency radio frequency identification tag
US7215295B2 (en) 2003-12-23 2007-05-08 3M Innovative Properties Company Ultra high frequency radio frequency identification tag
CN100464349C (en) * 2003-12-23 2009-02-25 3M创新有限公司 Ultra high frequency radio frequency identification tag
US7659863B2 (en) 2005-03-17 2010-02-09 Fujitsu Limited Tag antenna
JP2008072373A (en) * 2006-09-13 2008-03-27 Toa Corp Wireless microphone device
JP4537364B2 (en) * 2006-09-13 2010-09-01 ティーオーエー株式会社 Wireless microphone device
US8289163B2 (en) 2007-09-27 2012-10-16 3M Innovative Properties Company Signal line structure for a radio-frequency identification system
US8717244B2 (en) 2007-10-11 2014-05-06 3M Innovative Properties Company RFID tag with a modified dipole antenna
US7847697B2 (en) 2008-02-14 2010-12-07 3M Innovative Properties Company Radio frequency identification (RFID) tag including a three-dimensional loop antenna
US7982616B2 (en) 2008-02-14 2011-07-19 3M Innovative Properties Company Radio frequency identification (RFID) tag including a three-dimensional loop antenna
JP2016005081A (en) * 2014-06-16 2016-01-12 小島プレス工業株式会社 On-vehicle antenna

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