EP0956674A1 - Appareil de protection contre les ondes radioelectriques emises par un appareil de communication mobile - Google Patents

Appareil de protection contre les ondes radioelectriques emises par un appareil de communication mobile

Info

Publication number
EP0956674A1
EP0956674A1 EP97942229A EP97942229A EP0956674A1 EP 0956674 A1 EP0956674 A1 EP 0956674A1 EP 97942229 A EP97942229 A EP 97942229A EP 97942229 A EP97942229 A EP 97942229A EP 0956674 A1 EP0956674 A1 EP 0956674A1
Authority
EP
European Patent Office
Prior art keywords
frequency
radio
radio wave
variable capacitance
signal
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.)
Withdrawn
Application number
EP97942229A
Other languages
German (de)
English (en)
Inventor
Yoichi Maeda
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.)
Nikko Co Ltd
Original Assignee
Nikko Co Ltd
Nikko KK
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 Nikko Co Ltd, Nikko KK filed Critical Nikko Co Ltd
Publication of EP0956674A1 publication Critical patent/EP0956674A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/84—Jamming or countermeasure characterized by its function related to preventing electromagnetic interference in petrol station, hospital, plane or cinema
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/44—Jamming having variable characteristics characterized by the control of the jamming waveform or modulation type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/30—Jamming or countermeasure characterized by the infrastructure components
    • H04K2203/34—Jamming or countermeasure characterized by the infrastructure components involving multiple cooperating jammers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"

Definitions

  • the apparatus has three parallel radio wave generators, for example, first, second and third radio wave generators which are capable of generating first, second and third radio waves respectively which are swept in frequency in first, second and third sweeping ranges.
  • the first, second and third sweeping ranges are different from each other.
  • the first, second and third radio wave generators are connected to the triangle wave generator 10 in parallel to each other for receipt of the triangle wave signal generated by the triangle wave generator 10 in order to generate the first, second and third radio waves which are swept in accordance with the periodical variations in voltage level of the triangle wave signals.
  • the first, second and third radio wave generators are also connected to the power source 12 in parallel to each other for receiving the powers therefrom separately.
  • a second buffer amplifier 34 is provided which is connected to the second radio frequency oscillator 32 for amplifying the second radio frequency signal which varies in frequency proportionally to the periodical variation in capacitance of the second variable capacitance diode 30.
  • the frequency of the second radio frequency signal amplified by the second buffer amplifier 34 varies in the different range from that of the variable frequency of the first radio frequency signal amplified by the first buffer amplifier 24.
  • the second buffer amplifier 34 also serves to ensure the stability of the radio frequency signal.
  • the radio frequency signal amplified by the second buffer amplifier 34 is also swept in frequency at the same time-period as that of the triangle wave signal generated by the triangle wave generator 10, however, in the different frequency range from that of the radio frequency signal amplified by the first buffer amplifier 24.
  • a third antenna 46 is provided which is connected to the third buffer amplifier 44 for receiving the amplified radio frequency signal which is swept in frequency and irradiating a third radio wave which is swept in frequency at the same time-period as that of the triangle wave signal generated by the triangle wave generator 10.
  • a third width of sweeping in frequency of the third radio wave irradiated from the third antenna 46 is defined by the amplitude of the triangle wave signal generated by the triangle wave signal generator 10.
  • a third range of sweeping in frequency of the third radio wave irradiated from the third antenna 46 is different from the first range of sweeping in frequency of the first radio wave irradiated from the first antenna 26 and also different from the second range of sweeping in frequency of the second radio wave irradiated from the second antenna 36.
  • a third time-period of sweeping in frequency of the third radio wave irradiated from the third antenna 46 is defined by the time-period of the triangle wave signal generated by the triangle wave signal generator 10.
  • the third time-period of sweeping in frequency of the third radio wave irradiated from the third antenna 46 is the same as the first time-period of sweeping in frequency of the first radio wave irradiated from the first antenna 26 and also is the same as the second time-period of sweeping in frequency of the second radio wave irradiated from the second antenna 36.
  • the third radio wave generator is capable of controlling both the third range and the third time-period of sweeping in frequency of the third radio wave irradiated from the third antenna 46.
  • the radio wave irradiated from the first antenna 26 is swept in a shorter time period than 1/10,000 seconds, for example, at a frequency of 9 kHz.
  • the time period of sweeping in frequency of the radio wave irradiated from the first antenna 26 depends on the frequency of the triangle wave signal generated by the triangle wave signal generator 10, for which reason the frequency of the triangle wave signal generated by the triangle wave signal generator 10 is so set that the sweeping time period or frequency is at 9 kHz.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Public Health (AREA)
  • Transmitters (AREA)

Abstract

Appareil permettant de protéger un appareil électronique contre les ondes radioélectriques émises par un appareil de communication mobile situé à proximité. Ledit appareil de protection comporte plusieurs générateurs d'ondes radioélectriques destinés à produire des ondes d'inhibition transmises à l'appareil de communication mobile pour bloquer les ondes radioélectriques émises par ledit appareil. L'appareil selon la présente invention comporte en outre un moyen permettant d'amener la fréquence de la pluralité des générateurs d'ondes radioélectriques dans différentes gammes de fréquences réglées pour couvrir toutes les gammes de fréquence des appareils de communication.
EP97942229A 1997-10-02 1997-10-02 Appareil de protection contre les ondes radioelectriques emises par un appareil de communication mobile Withdrawn EP0956674A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/003534 WO1999018688A1 (fr) 1997-10-02 1997-10-02 Appareil de protection contre les ondes radioelectriques emises par un appareil de communication mobile

Publications (1)

Publication Number Publication Date
EP0956674A1 true EP0956674A1 (fr) 1999-11-17

Family

ID=14181242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97942229A Withdrawn EP0956674A1 (fr) 1997-10-02 1997-10-02 Appareil de protection contre les ondes radioelectriques emises par un appareil de communication mobile

Country Status (3)

Country Link
EP (1) EP0956674A1 (fr)
JP (1) JP2001507198A (fr)
WO (1) WO1999018688A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7514469B2 (en) 2002-04-30 2009-04-07 Unigen Pharmaceuticals, Inc. Formulation of a mixture of Free-B-ring flavonoids and flavans as a therapeutic agent
US7531521B2 (en) 2003-02-26 2009-05-12 Unigen Pharmaceuticals, Inc. Formulation for use in the prevention and treatment of carbohydrate induced diseases and conditions

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765884B1 (en) 1999-07-29 2004-07-20 Sagem Sa Apparatus and process for transmitting a deceitful signal to a mobile phone
FR2797139B1 (fr) * 1999-07-29 2001-09-21 Sagem Dispositif et procede d'emission d'un signal trompeur destine a un telephone mobile
CN1324917C (zh) * 2003-10-30 2007-07-04 中兴通讯股份有限公司 智能移动终端屏蔽装置和方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299171A (en) * 1970-07-20 1994-03-29 The United States Of America As Represented By The Secretary Of The Navy Torpedo decoy signal generator
US4342119A (en) * 1980-08-27 1982-07-27 The United States Of America As Represented By The Secretary Of The Air Force Multi-tone jammer
US5295180A (en) * 1992-04-08 1994-03-15 U S West Newvector Group, Inc. Cellular telephone zone system
US5647379A (en) * 1994-11-22 1997-07-15 Ventritex, Inc. Correlator based electromagnetic interference responsive control system useful in medical devices

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9918688A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7514469B2 (en) 2002-04-30 2009-04-07 Unigen Pharmaceuticals, Inc. Formulation of a mixture of Free-B-ring flavonoids and flavans as a therapeutic agent
US7674830B2 (en) 2002-04-30 2010-03-09 Unigen Pharmaceuticals, Inc. Formulation of a mixture of free-B-ring flavonoids and flavans as a therapeutic agent
US7531521B2 (en) 2003-02-26 2009-05-12 Unigen Pharmaceuticals, Inc. Formulation for use in the prevention and treatment of carbohydrate induced diseases and conditions

Also Published As

Publication number Publication date
JP2001507198A (ja) 2001-05-29
WO1999018688A1 (fr) 1999-04-15

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990819

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NIKKO CO., LTD.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030503