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GB1499408A - Microwave power amplifying system - Google Patents

Microwave power amplifying system

Info

Publication number
GB1499408A
GB1499408A GB1804475A GB1804475A GB1499408A GB 1499408 A GB1499408 A GB 1499408A GB 1804475 A GB1804475 A GB 1804475A GB 1804475 A GB1804475 A GB 1804475A GB 1499408 A GB1499408 A GB 1499408A
Authority
GB
United Kingdom
Prior art keywords
amplifiers
amplifier
input
antenna
april
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
GB1804475A
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.)
International Standard Electric Corp
Original Assignee
International Standard 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1499408A publication Critical patent/GB1499408A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/526—Circuit arrangements for protecting such amplifiers protecting by using redundant amplifiers

Landscapes

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

Abstract

1499408 Microwave amplifiers INTERNATIONAL STANDARD ELECTRIC CORP 30 April 1975 [30 April 1974] 18044/75 Heading H3W A microwave amplification system comprises parallel amplifiers 8, 9, Fig. 1, and input and output couplers 1, 2 whereby in normal operation, the amplifiers work in parallel but if a circuit 15 deduces from measurements made at 10, 11, 12 and 13 that one amplifier is defective, it switches off that amplifier and alters the phase shift introduced at 101, 102, 121, 122 to switch all the power through the working amplifier. The coupling circuits comprise 3 dB hybrid junctions 100, 103 and ferrite phase shifters 101, 102. Normally the paths through 102 and 122 are #/4 longer than those through 101 and 121 so that an input at E is divided into equal parts for amplifiers 8, 9 and equal signals applied to hybrid junction 120 feed an output antenna S. Opposite 45 degree phase shifts are applied to 101 and 102 to direct the whole signal to one amplifier or the other and to 121, 122 to couple the operative amplifier to the antenna. When the amplification system has several stages in series, couplers may be provided between each stage to cut out any defective amplifiers. To minimize the effect of reflections from the antenna, the length from amplifiers 8 and 9 to the input of coupler 12 differs by #/4.
GB1804475A 1974-04-30 1975-04-30 Microwave power amplifying system Expired GB1499408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7414935A FR2269821B1 (en) 1974-04-30 1974-04-30

Publications (1)

Publication Number Publication Date
GB1499408A true GB1499408A (en) 1978-02-01

Family

ID=9138287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1804475A Expired GB1499408A (en) 1974-04-30 1975-04-30 Microwave power amplifying system

Country Status (2)

Country Link
FR (1) FR2269821B1 (en)
GB (1) GB1499408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047754A4 (en) * 1980-03-21 1982-07-19 Comsonics Inc Split-band redundant amplifier system.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056785A (en) * 1976-12-06 1977-11-01 Bell Telephone Laboratories, Incorporated Low-noise microwave amplifier
DE59209186D1 (en) * 1992-06-02 1998-03-12 Mikom Gmbh Semi-redundant power amplifiers for single and multi-channel operation
FR2693597B1 (en) * 1992-07-10 1994-09-02 Michel Muzard Uninterruptible microwave switching method and switching system, in a microwave transmission installation, implementing the method.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047754A4 (en) * 1980-03-21 1982-07-19 Comsonics Inc Split-band redundant amplifier system.

Also Published As

Publication number Publication date
FR2269821B1 (en) 1978-06-02
FR2269821A1 (en) 1975-11-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee