GB723815A - Improvements in piezo-electric systems including a passive responder unit - Google Patents

Improvements in piezo-electric systems including a passive responder unit

Info

Publication number
GB723815A
GB723815A GB16269/52A GB1626952A GB723815A GB 723815 A GB723815 A GB 723815A GB 16269/52 A GB16269/52 A GB 16269/52A GB 1626952 A GB1626952 A GB 1626952A GB 723815 A GB723815 A GB 723815A
Authority
GB
United Kingdom
Prior art keywords
piezo
receiver
systems including
electric systems
responder unit
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.)
Expired
Application number
GB16269/52A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB723815A publication Critical patent/GB723815A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D11/00—Super-regenerative demodulator circuits
    • H03D11/02—Super-regenerative demodulator circuits for amplitude-modulated oscillations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/756—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator for modifying the reflectivity of the reflector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B11/00—Generation of oscillations using a shock-excited tuned circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Burglar Alarm Systems (AREA)
GB16269/52A 1951-06-27 1952-06-27 Improvements in piezo-electric systems including a passive responder unit Expired GB723815A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR723815X 1951-06-27

Publications (1)

Publication Number Publication Date
GB723815A true GB723815A (en) 1955-02-09

Family

ID=9106316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16269/52A Expired GB723815A (en) 1951-06-27 1952-06-27 Improvements in piezo-electric systems including a passive responder unit

Country Status (2)

Country Link
DE (1) DE969289C (de)
GB (1) GB723815A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1037530B (de) * 1956-02-08 1958-08-28 Pintsch Electro Gmbh Anordnung zur elektronischen Steuerung des Rueckstrahlvermoegens von Reflektoren
DE1058580B (de) * 1956-08-16 1959-06-04 Philips Patentverwaltung Verfahren zur Kennzeichnung eines beweglichen Objektes aus einer Mehrzahl gleichartiger Objekte mittels eines Radarsystems
DE1063219B (de) * 1954-09-27 1959-08-13 Radio Patents Company Funkuebertragungssystem mit einem Sender-Empfaenger an einem Endpunkt der UEbertragungsstrecke und mit einem vorzugsweise passiven Antwortsender am anderen Endpunkt

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102613B (de) * 1959-10-06 1961-03-16 Garrett Corp Fernmesseinrichtung
US3307168A (en) * 1962-11-19 1967-02-28 Gen Precision Inc Signalling system
DE1240761B (de) * 1963-10-30 1967-05-18 Gen Electric System zur Erkennung von Gegenstaenden
SE321883B (de) * 1965-03-05 1970-03-16 A Minasy
SE413359B (sv) 1978-08-25 1980-05-19 Stiftelsen Inst Mikrovags Anordning for astadkommande av ett enkelt sidband

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR496331A (fr) * 1918-01-14 1919-11-04 Submarine Signal Co Perfectionnements dans les procédés et appareils pour l'utilisation des impulsions rayonnantes comme signaux et autres applications
FR692719A (fr) * 1929-03-26 1930-11-10 Siemens Ag Dispositif de mesure à distance
BE354930A (de) * 1933-08-31
DE738963C (de) * 1935-11-01 1943-09-06 Telefunken Gmbh Verfahren zur Standortbestimmung von Flugzeugen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063219B (de) * 1954-09-27 1959-08-13 Radio Patents Company Funkuebertragungssystem mit einem Sender-Empfaenger an einem Endpunkt der UEbertragungsstrecke und mit einem vorzugsweise passiven Antwortsender am anderen Endpunkt
DE1037530B (de) * 1956-02-08 1958-08-28 Pintsch Electro Gmbh Anordnung zur elektronischen Steuerung des Rueckstrahlvermoegens von Reflektoren
DE1058580B (de) * 1956-08-16 1959-06-04 Philips Patentverwaltung Verfahren zur Kennzeichnung eines beweglichen Objektes aus einer Mehrzahl gleichartiger Objekte mittels eines Radarsystems

Also Published As

Publication number Publication date
DE969289C (de) 1958-05-14

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