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GB2003328A - Improvements in or relating to multi-band transmission circuits - Google Patents

Improvements in or relating to multi-band transmission circuits

Info

Publication number
GB2003328A
GB2003328A GB7834008A GB7834008A GB2003328A GB 2003328 A GB2003328 A GB 2003328A GB 7834008 A GB7834008 A GB 7834008A GB 7834008 A GB7834008 A GB 7834008A GB 2003328 A GB2003328 A GB 2003328A
Authority
GB
United Kingdom
Prior art keywords
relating
band transmission
transmission circuits
separation
frequency
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.)
Granted
Application number
GB7834008A
Other versions
GB2003328B (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.)
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Publication of GB2003328A publication Critical patent/GB2003328A/en
Application granted granted Critical
Publication of GB2003328B publication Critical patent/GB2003328B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Soft Magnetic Materials (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

A transmission circuit for v.h.f. and u.h.f. operation, in which two or more transmitters (S1, S2) are connected to a common antenna (1) via one or more four-port directional couplers (K), separation being effectively increased by connecting a frequency-dependent complex impedance network (N) to the fourth port of the directional coupler, in order to off-set the separation- reducing effect that is due to the frequency-dependent input impedance of the antenna system. The invention is used in the construction of transmitter circuits in which a plurality of tunable transmitters are connected to one antenna system. <IMAGE>
GB7834008A 1977-08-19 1978-08-21 Multi-band transmission circuits Expired GB2003328B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2737529A DE2737529B2 (en) 1977-08-19 1977-08-19 Switch circuit for short and very short electromagnetic waves

Publications (2)

Publication Number Publication Date
GB2003328A true GB2003328A (en) 1979-03-07
GB2003328B GB2003328B (en) 1982-03-17

Family

ID=6016848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7834008A Expired GB2003328B (en) 1977-08-19 1978-08-21 Multi-band transmission circuits

Country Status (10)

Country Link
AT (1) AT372808B (en)
BE (1) BE869853A (en)
CH (1) CH631835A5 (en)
DE (1) DE2737529B2 (en)
DK (1) DK366478A (en)
FR (1) FR2400780A1 (en)
GB (1) GB2003328B (en)
IT (1) IT1097650B (en)
NL (1) NL7806932A (en)
NO (1) NO147658C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199449A (en) * 1986-12-10 1988-07-06 Gen Electric Plc Radio transmitter arrangements

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1546878A (en) * 1921-06-07 1925-07-21 Gen Electric Radio receiving system
GB1114153A (en) * 1964-08-07 1968-05-15 British Broadcasting Corp Improvements in and relating to the combining of radio frequency signals
FR1442904A (en) * 1964-08-07 1966-06-17 Marconi Co Ltd Device combining radio frequency signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199449A (en) * 1986-12-10 1988-07-06 Gen Electric Plc Radio transmitter arrangements
GB2199449B (en) * 1986-12-10 1991-01-09 Gen Electric Plc Radio transmitter arrangements

Also Published As

Publication number Publication date
DK366478A (en) 1979-02-20
DE2737529B2 (en) 1980-02-14
CH631835A5 (en) 1982-08-31
NO147658C (en) 1983-05-25
NL7806932A (en) 1979-02-21
FR2400780A1 (en) 1979-03-16
FR2400780B1 (en) 1983-05-06
NO782790L (en) 1979-02-20
NO147658B (en) 1983-02-07
ATA599278A (en) 1983-03-15
AT372808B (en) 1983-11-25
IT7826705A0 (en) 1978-08-11
DE2737529A1 (en) 1979-02-22
IT1097650B (en) 1985-08-31
GB2003328B (en) 1982-03-17
BE869853A (en) 1979-02-19

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Legal Events

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