US3766499A - Directional broadband coupler arrangement - Google Patents

Directional broadband coupler arrangement Download PDF

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Publication number
US3766499A
US3766499A US00314275A US3766499DA US3766499A US 3766499 A US3766499 A US 3766499A US 00314275 A US00314275 A US 00314275A US 3766499D A US3766499D A US 3766499DA US 3766499 A US3766499 A US 3766499A
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United States
Prior art keywords
arrangement
end portion
winding
set forth
core
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Expired - Lifetime
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US00314275A
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English (en)
Inventor
K Dillenberger
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Robert Bosch Elektronik GmbH
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Robert Bosch Elektronik GmbH
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    • 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
    • H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
    • H03H7/482—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source particularly adapted for use in common antenna systems

Definitions

  • a second winding has a first terminal connected to the input, passes through the second bore and has a second terminal connected to ground.
  • a third winding has a first end portion connected to the tap output, passes through the second bore and has a second end portion connected to ground through a terminating resistor.
  • a fourth winding has a first end portion connected to the tap output, passes through the first bore and has a second end portion connected to ground potential. The first and fourth windings are wound through the bore and around the outside portion of the core in a first direction, while the third and second winding are wound in the opposite direction.
  • the first and third windings have a number of turns which is much smaller than the number of turns of the second and fourth winding.
  • This invention relates to directional broadband coupling arrangements which have a core of ferromagnetic material and, more specifically, have a core with two holes and are used for community antenna systems.
  • the present invention relates to a coupler arrangement wherein a high frequency line applies high frequency energy to an input of the arrangement and most of the high frequency energy is transmitted to a main line output while only a considerably smaller portion thereof is transmitted to a tap output.
  • This arrangement differs from the arrangements normally called distributor arrangements in that the distributor arrangements distribute equal amounts of energy to a plurality of lines, while the present arrangement distributes, as mentioned above, the greatest part of the incoming energy to the main line output and only a small portion thereof to one or more tap outputs.
  • two individual lines which are mutually coupled both inductively and capacitively can be used. These lines have a preferred energy transmission in a particular direction.
  • the inductive and capacitive coupling must have a predetermined relationship, the lengthof the line must have a value depending on the frequency of the high frequency signals and the terminating resistance at the ends of the line must correspond to the wave impedance of the lines or cables connected thereto.
  • a distributor is known (German Auslegeschrift 1,257,907) which has a primary winding and two symmetrical secondary windings, which windings may besituated on a double bore core.
  • the coupling attenuation between the first and second output may reach a value of approximately 25 dB, that is a value which lies at the lower end of the previously attainable coupling attenuations.
  • the present invention is a directional broadband coupler arrangement having an input, a main line output and a tap output. It comprises ferromagnetic core means having a first and second bore. It further comprises first conducting means having a first end portion connected to said input, a determined conducting portion passing through said first bore and a second end portion connected to said main line output. Second conducting means have a first end portion connected to said input, a determined conducting portion passing through said second bore and a second end portion connected to ground potential. Third conducting means have a first end portion connected to the tap I together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
  • FIG. 1 is a block diagram showing a coupler arrangement for a community antenna system
  • FIG. 2 shows the basic arrangement of a coupler having a two-bore core
  • FIG. 3a is the circuit diagram for the embodiment of the coupler system shown in FIG. 3b;
  • FIG. 3b is a perspective view of a coupler arrangement with approximately 10-fold amplification
  • FIG. 4 is a circuit diagram showing a coupler arrangement having adjustable coupling attenuation
  • FIG. 5 is a perspective view of a coupler with an auxiliary winding, showing only the core with the auxiliary winding and an auxiliary resistor connected to said auxiliary winding.
  • FIG. 1 shows the input 1 to which is connected the incoming main line.
  • the main line output is indicated at reference numeral 2, while the tap output, to which is connected the branch line, is designated by reference numeral 3.
  • the main high frequency energy applied to input 1 is to be transmitted to output 2, while only a small portion of said energy is to be transmitted to output 3.
  • the coupler 4 must not only divide the high frequency energy into two unequal portions, but must also fulfill the requirement that a much higher attenuation exists between output 2 and output 3 (herein referred to as decoupling attenuation) then exists between input 1 and output 3 (herein referred to as coupling attenuation) as well as between input 1 and output 2 (herein referred to as transmission attenuation).
  • decoupling attenuation a much higher attenuation exists between output 2 and output 3
  • transmission attenuation should be of the order of 0.2 to 1 dB, the coupling attenuation for example between and 20 dB, while a decoupling attenuation exceeding 40 dB is very desirable.
  • a coupler arrangement in which decoupling attenuations of up to 70 dB may be attained, is built in accordance with the principal illustrated in FIG. 2.
  • the coupler in accordance with FIG. 2 has an unsymmetrical input 1, a main line output 2, and a tap output 3.
  • a first conducting means 5 is connected from input 1 through first bore 6 of a ferromagnetic core 7, which has two axial bores, 6 and 8.
  • second conducting means Connected between input 1 and ground are second conducting means, a winding 9 which passes through the second bore 8 of core 7.
  • Third conducting means, here a conductor segment 10 have an end terminal connected to the tap output 3, pass through the second bore -8 of core 7 and have a second terminal connected to ground through a terminating resistor 11.
  • Fourth conducting means, namely a winding 23 have one end terminal connected from the tap output 3, a predetermined conducting portion passing through firstbore 6 of core 7 and a second end portion directly connected to ground potential.
  • the resistances'shown in dashed line form in FIG. 2 signify the wave impedance of the lines connected to the various terminals.
  • FIG. 3b An embodiment of a coupler which has been tested and foundsatisfactory in practice is shown in FIG. 3b
  • FIG. 3a The dashed lines in FIG. 3a indicate the cross section of core 7 which has a first and second bore having reference numerals 6 and'8 respectively. It should be noted that the reference numerals used in FIG. 3a are the same as those used in FIGS. 1 and 2.
  • the first and'third winding means 1 and 10 which are simply portions of conductor in FIG. 2 are replaced in FIGS. 3a and 3b by windings 5' and 10. It will be noted that windings 5 and 12 which are pictured as inside bore 6 in FIG. 3a are actually wound through the bore 6 and around the external surface of core 7. as shown in FIG. 3b. Similarly windings 9 and 10' are wound by passing through bore 8 and then around the outside surface of core 7. Windings 5'--and 10' have relatively few turns,
  • auxiliary winding which has reference numeral 13 in FIG. 4.
  • the wire of this auxiliary winding is connected from ground, passes through the second bore 8 of core 7, thence passes around the external surface of the core between bores 6 and 8 and back through the first bore 6.
  • the auxiliary winding 13 may be connected either directly to ground or, as shown in FIG. 5, may be connectedto ground through a resistor 15.
  • Resistor 15 may serveas an adjustment resistor allowing a continuous adjustment of the coupling between windings 5', 12 and 9,10, with a consequent adjustment of the decoupling attenuation.
  • Capacitor 16 is connected in parallel to resistor 15 in order to improve the decoupling attenuation at higher frequencies.
  • the construction-of the coupler may be made even more compact by inserting the terminating resistor 11 (also see FIG. 3b) into the second bore 8 of core 7 (FIG. 5).
  • a piece of insulating hose 17 within the second bore 8 of core'7 serves to maintain the position of.
  • the directional coupler of the present invention may also be used with advantage for furnishing tap outputs from two main lines. Of course in this case further windings would be required.
  • the core of FIG. 3b has a height of 7 mm, a width of 4 mm, a depth of 4 mm, a bore diameter of 2 mm and a distance between bore centers of 3 mm.
  • Windings 5i and 10 each have a half a turn, while windings 4 and 9 each have 3.5 turns.
  • the wave impedance at input, output, and tap are 75 ohms each, as is the resistance of resistor 11 (FIG. 3a);
  • the transmission attenuation at 40MHz is 0.6 dB.
  • a directional broadband arrangement having a main line input, a main line output and a tap output comprising, in combination, ferromagnetic core means having a first and second hole; first conducting means having a first end portion connected to said input, a determined conducting portion extending through said first hole and a second end portion connected to said main line output; second conducting means having a first end portion connected to said input, a determined conducting portion passing through said second hole and a second end portion connected to ground; third conducting means having a first end portion connected to said tap output; a determined conducting portion passing through said second hole, and a second end portion; terminating resistor means having a first terminal connected to said second end portion of said third conducting means and a second terminal connected to ground potential; and fourth conducting means having a first end portion connected to said tap output, a determined conducting portion passing through said first hole, and a second end portion connected to ground potential.
  • first conducting means comprise first winding means wound through said first hole and around said external surface of said core means in a second predetermined winding direction opposite to said first predetermined winding direction; and wherein said fourth conducting means comprise fourth winding means wound through said first hole and around said external surface of said core means in said second predetermined winding direction.
  • auxiliary winding means for adjusting the decoupling attenuation between said main line output and said tap output, said auxiliary winding means having a first end portion and a second end portion connected to said first end portion.
  • auxiliary winding means having a first and second end portion connected in common and a predetermined conducting portion passing through said second hole, around said external surface of said core means and back through said first hole.
  • said core means has first and second ones of said first, second, third and fourth winding means, respectively constituting a first and second coupler arrangement; and wherein said auxiliary winding means comprise a single auxiliary winding for both said first and second coupler arrangement.
  • auxiliary resistor means comprise adjustable resistor means.

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US00314275A 1971-12-11 1972-12-11 Directional broadband coupler arrangement Expired - Lifetime US3766499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712161620 DE2161620B2 (de) 1971-12-11 1971-12-11 Richtungsabhaengiger breitbanduebertrager in gabelschaltung

Publications (1)

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US3766499A true US3766499A (en) 1973-10-16

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ID=5827735

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Application Number Title Priority Date Filing Date
US00314275A Expired - Lifetime US3766499A (en) 1971-12-11 1972-12-11 Directional broadband coupler arrangement

Country Status (9)

Country Link
US (1) US3766499A (de)
BE (1) BE792048A (de)
CH (1) CH540553A (de)
DE (1) DE2161620B2 (de)
DK (1) DK129020B (de)
FR (1) FR2162673B1 (de)
GB (1) GB1346040A (de)
NL (1) NL7210787A (de)
SE (1) SE378934B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119914A (en) * 1975-11-28 1978-10-10 Dana Corporation Double balanced mixer using single ferrite core
EP0177675A2 (de) * 1984-09-22 1986-04-16 Robert Bosch Gmbh HF-Breitbandübertragerschaltung
US4717896A (en) * 1985-03-21 1988-01-05 And Yet, Inc. Balun
US4785273A (en) * 1985-03-27 1988-11-15 Doty David F Strip-line-core transformer
US4789845A (en) * 1988-01-20 1988-12-06 Prabhakara Reddy Broad band hybrid signal splitter
EP0399202A2 (de) * 1989-05-24 1990-11-28 RICHARD HIRSCHMANN GMBH & CO. Hochfrequenz-Richtkopplerabzweiger
EP1043736A1 (de) * 1999-04-07 2000-10-11 Rohde & Schwarz GmbH & Co. KG Transformatoranordnung für einen Gegentakt-Verstärker eines Kurz- oder Ultrakurzwellen-Senders
US20080150667A1 (en) * 2006-12-22 2008-06-26 Asustek Computer Inc. Signal distributing inductor
US20080200060A1 (en) * 2007-02-16 2008-08-21 Buckmeier Brian J Electrical Isolation Device Capable Of Limiting Magnetic Saturation Even Upon Receipt Of High Power DC Bias And Method For Making The Same
US10998123B2 (en) * 2017-12-05 2021-05-04 Murata Manufacturing Co., Ltd. Balun and method for manufacturing same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309151C3 (de) * 1973-02-23 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Frequenzweiche
DE4411894C1 (de) * 1994-04-07 1995-06-14 Rohde & Schwarz Leistungs-Impedanz-Transformator für Transistor-Gegentakt-Leistungsverstärker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454905A (en) * 1966-01-17 1969-07-08 Winegard Co Electrical line-splitter device
US3596210A (en) * 1968-07-10 1971-07-27 Thomson Csf N-input aperiodic hybrid coupler
US3641464A (en) * 1969-11-07 1972-02-08 Lindsay Specialty Prod Ltd Directional communication signal tap

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE514947A (de) *
DE1276146B (de) * 1963-03-04 1968-08-29 Siemens Ag Abzweigschaltung fuer Gemeinschaftsantennenanlagen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454905A (en) * 1966-01-17 1969-07-08 Winegard Co Electrical line-splitter device
US3596210A (en) * 1968-07-10 1971-07-27 Thomson Csf N-input aperiodic hybrid coupler
US3641464A (en) * 1969-11-07 1972-02-08 Lindsay Specialty Prod Ltd Directional communication signal tap

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119914A (en) * 1975-11-28 1978-10-10 Dana Corporation Double balanced mixer using single ferrite core
EP0177675A2 (de) * 1984-09-22 1986-04-16 Robert Bosch Gmbh HF-Breitbandübertragerschaltung
EP0177675A3 (de) * 1984-09-22 1987-12-02 Robert Bosch Gmbh HF-Breitbandübertragerschaltung
US4717896A (en) * 1985-03-21 1988-01-05 And Yet, Inc. Balun
US4785273A (en) * 1985-03-27 1988-11-15 Doty David F Strip-line-core transformer
US4789845A (en) * 1988-01-20 1988-12-06 Prabhakara Reddy Broad band hybrid signal splitter
EP0399202A2 (de) * 1989-05-24 1990-11-28 RICHARD HIRSCHMANN GMBH & CO. Hochfrequenz-Richtkopplerabzweiger
EP0399202A3 (de) * 1989-05-24 1991-03-27 RICHARD HIRSCHMANN GMBH & CO. Hochfrequenz-Richtkopplerabzweiger
EP1043736A1 (de) * 1999-04-07 2000-10-11 Rohde & Schwarz GmbH & Co. KG Transformatoranordnung für einen Gegentakt-Verstärker eines Kurz- oder Ultrakurzwellen-Senders
US20080150667A1 (en) * 2006-12-22 2008-06-26 Asustek Computer Inc. Signal distributing inductor
US7705703B2 (en) * 2006-12-22 2010-04-27 Unihan Corporation Signal distributing inductor
US20080200060A1 (en) * 2007-02-16 2008-08-21 Buckmeier Brian J Electrical Isolation Device Capable Of Limiting Magnetic Saturation Even Upon Receipt Of High Power DC Bias And Method For Making The Same
US10998123B2 (en) * 2017-12-05 2021-05-04 Murata Manufacturing Co., Ltd. Balun and method for manufacturing same

Also Published As

Publication number Publication date
BE792048A (fr) 1973-03-16
FR2162673B1 (de) 1976-06-04
GB1346040A (en) 1974-02-06
DE2161620A1 (de) 1972-12-07
SE378934B (de) 1975-09-15
DK129020B (da) 1974-08-05
DE2161620B2 (de) 1972-12-07
FR2162673A1 (de) 1973-07-20
NL7210787A (de) 1973-06-13
CH540553A (de) 1973-08-15

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