ZA842090B - A wide-band short-wave radio transmitter - Google Patents

A wide-band short-wave radio transmitter

Info

Publication number
ZA842090B
ZA842090B ZA842090A ZA842090A ZA842090B ZA 842090 B ZA842090 B ZA 842090B ZA 842090 A ZA842090 A ZA 842090A ZA 842090 A ZA842090 A ZA 842090A ZA 842090 B ZA842090 B ZA 842090B
Authority
ZA
South Africa
Prior art keywords
transmitter
working frequency
frequency
harmonics
transmitter working
Prior art date
Application number
ZA842090A
Inventor
Johann Gerhard Zirwas
Original Assignee
Siemens Ag
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 Ag filed Critical Siemens Ag
Publication of ZA842090B publication Critical patent/ZA842090B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source

Abstract

1. Transmitter, especially short-wave transmitter, which can be tuned in a wide frequency band and having a push-pull final amplifier, preferably transistor amplifier, and a filter arrangement provided between the final amplifier output and the transmitter output, the subfilters (TP1...TPn) of which filter arrangement, which are associated with certain component frequency ranges of the transmitter working frequency and serve to suppress undesired harmonics of the transmitter working frequencies, can be switched into the signal path alternatively on the input side and output side via electrically controllable switches (S11, 512...) depending on the transmitter working frequency, characterized in that the subfilters (TP1...TPn) are dimensioned solely for a sufficiently large stop band attenuation of the harmonics n . fo of the transmitter working frequency to which are even multiples (n = 2,4...) hereof, and in that the required stop band attenuation for harmonics n . fo that are odd multiples (n = 3,5, ...) of the transmitter working frequency fo is produced by additional switching into which, the signal path of at least one further subfilter, in this case, related to the component frequency range determined by the transmitter working frequency fo, is associated with the component frequency range adjoining this component frequency range in the direction of increasing frequencies.
ZA842090A 1983-03-22 1984-03-21 A wide-band short-wave radio transmitter ZA842090B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833310389 DE3310389A1 (en) 1983-03-22 1983-03-22 BROADBAND TRANSMITTER FOR SHORT ELECTROMAGNETIC WAVES

Publications (1)

Publication Number Publication Date
ZA842090B true ZA842090B (en) 1984-10-31

Family

ID=6194305

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA842090A ZA842090B (en) 1983-03-22 1984-03-21 A wide-band short-wave radio transmitter

Country Status (5)

Country Link
EP (1) EP0119628B1 (en)
AT (1) ATE48053T1 (en)
DE (2) DE3310389A1 (en)
IN (1) IN162361B (en)
ZA (1) ZA842090B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN165870B (en) * 1985-06-25 1990-02-03 Siemens Ag
DE3614333A1 (en) * 1986-04-28 1987-10-29 Siemens Ag Filter calibration method and device for implementing it

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1485111A (en) * 1921-08-02 1924-02-26 Bethenod Joseph Radio transmission system
US4165493A (en) * 1978-04-17 1979-08-21 Rockwell International Corporation Protected amplifier apparatus

Also Published As

Publication number Publication date
DE3480511D1 (en) 1989-12-21
EP0119628A3 (en) 1987-01-28
ATE48053T1 (en) 1989-12-15
DE3310389A1 (en) 1984-10-11
EP0119628B1 (en) 1989-11-15
EP0119628A2 (en) 1984-09-26
IN162361B (en) 1988-05-14

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