GB1207013A - Antenna amplifier - Google Patents

Antenna amplifier

Info

Publication number
GB1207013A
GB1207013A GB41388/68A GB4138868A GB1207013A GB 1207013 A GB1207013 A GB 1207013A GB 41388/68 A GB41388/68 A GB 41388/68A GB 4138868 A GB4138868 A GB 4138868A GB 1207013 A GB1207013 A GB 1207013A
Authority
GB
United Kingdom
Prior art keywords
amplifier
transistor
antenna
feedback
negative resistance
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
GB41388/68A
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.)
SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
Original Assignee
SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
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 SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH filed Critical SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
Publication of GB1207013A publication Critical patent/GB1207013A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/191—Tuned amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1,207,013. Antenna amplifier. SABA SCHWARZWALDER APPARATE - BAU - ANSTALT AUGUST SCHWER SOHNE G.m.b.H. 29 Aug., 1968 [21 Oct., 1967], No. 41388/68. Heading H3T. An antenna 8 is coupled to an amplifier 9 by a negative resistance circuit comprising an amplifying element such as a transistor 1 connected as an oscillator but prevented from oscillating by negative feedback. The negative feedback is provided by emitter resistors 6, 7 of a high value, which stabilize the working point of the transistor 1, and a capacitive voltage divider 4, 5 improves stability. A transformer 2 has its primary connected to the collector of transistor 1 and is tuned to the received frequency, the secondary providing the effective negative resistance connected between the antenna and the amplifier 9. The stabilizing feedback of transistor 1 is arranged to be varied as the tuning is changed, to maintain uniform feedback over the tuning range. The negative resistance RT may be arranged (Fig. 2, not shown) in parallel with the amplifier 9 input. The common base transistor of the amplifier 9 has a high emitter resistance for stability, and a tuned transformer couples its collector to a receiver (11). The negative resistance circuit is said to effectively increase the antenna absorption surface area.
GB41388/68A 1967-10-21 1968-08-29 Antenna amplifier Expired GB1207013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES112511A DE1283307B (en) 1967-10-21 1967-10-21 Antenna amplifier

Publications (1)

Publication Number Publication Date
GB1207013A true GB1207013A (en) 1970-09-30

Family

ID=7531826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41388/68A Expired GB1207013A (en) 1967-10-21 1968-08-29 Antenna amplifier

Country Status (4)

Country Link
US (1) US3633109A (en)
DE (1) DE1283307B (en)
FR (1) FR1586937A (en)
GB (1) GB1207013A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942119A (en) * 1973-03-02 1976-03-02 Hans Kolbe & Co. Multiple-transmission-channel active antenna arrangement
DK147560C (en) * 1980-03-13 1985-07-22 Bang & Olufsen As MAGNETIC SIGNALS RECEIVER ANTENNA, e.g. ferrite
US8629650B2 (en) 2008-05-13 2014-01-14 Qualcomm Incorporated Wireless power transfer using multiple transmit antennas
US8878393B2 (en) * 2008-05-13 2014-11-04 Qualcomm Incorporated Wireless power transfer for vehicles
US20100201312A1 (en) 2009-02-10 2010-08-12 Qualcomm Incorporated Wireless power transfer for portable enclosures
US8854224B2 (en) * 2009-02-10 2014-10-07 Qualcomm Incorporated Conveying device information relating to wireless charging
US9312924B2 (en) 2009-02-10 2016-04-12 Qualcomm Incorporated Systems and methods relating to multi-dimensional wireless charging
NO346232B1 (en) 2017-01-25 2022-05-02 Norbit Its Transponder Stabilization

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047484A (en) * 1900-01-01
US2662122A (en) * 1949-06-01 1953-12-08 Bell Telephone Labor Inc Two-way transistor electrical transmission system
US2679001A (en) * 1950-10-11 1954-05-18 Electro Voice Television receiving system
US2927967A (en) * 1957-10-14 1960-03-08 Bell Telephone Labor Inc Negative impedance repeater
US2998581A (en) * 1958-06-09 1961-08-29 Automatic Elect Lab Negative impedance repeaters having gain controls
US3248557A (en) * 1959-07-20 1966-04-26 Bendix Corp Transistor parametric reactance amplifier
US3077562A (en) * 1960-01-07 1963-02-12 Lee P Key High gain radio receiver
US3098973A (en) * 1960-05-27 1963-07-23 Sylvania Electric Prod Antenna incorporating active elements
US3098773A (en) * 1960-07-08 1963-07-23 K W Battery Company Vent cover
US3204048A (en) * 1961-09-29 1965-08-31 Bell Telephone Labor Inc Negative impedance repeaters for non-loaded lines
US3304511A (en) * 1965-05-27 1967-02-14 Collins Radio Co Gain stabilization network for negative resistance amplifier
US3457528A (en) * 1965-12-14 1969-07-22 Univ Illinois Broadband negative resistance device
US3475759A (en) * 1967-10-10 1969-10-28 Winegard Co Television antenna with built-in cartridge preamplifier

Also Published As

Publication number Publication date
DE1283307B (en) 1968-11-21
US3633109A (en) 1972-01-04
FR1586937A (en) 1970-03-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees