US2502766A - Circuit arrangement for the transmission of ultra high frequency electrical oscillations - Google Patents

Circuit arrangement for the transmission of ultra high frequency electrical oscillations Download PDF

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Publication number
US2502766A
US2502766A US685188A US68518846A US2502766A US 2502766 A US2502766 A US 2502766A US 685188 A US685188 A US 685188A US 68518846 A US68518846 A US 68518846A US 2502766 A US2502766 A US 2502766A
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United States
Prior art keywords
impedance
conductors
circuit
frequency electrical
electrical oscillations
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Expired - Lifetime
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US685188A
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English (en)
Inventor
Johannes Marinus Van Hofweegen
Knol Kornelis Swier
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/04—Coupling devices of the waveguide type with variable factor of coupling

Definitions

  • Impedance transformers are known, consisting of a certain number of parallel conductors which form lecher systems in pairs that are each adjusted by means of a short-circuit bridge and are decoupled with respect to one another. These impedance transformers are suffering from the drawback that their construction and control is complicated.
  • the present invention provides a simple circuit by means of which any impedance can be transformed into any other impedance and the adjustment of which is easy.
  • the circuit according to the invention is characterised by three parallel or substantially parallel conductors a, b, c, all of which are intercoupled and of which two of the ends at the same side serve to constitute input terminals a, c whereas the third of these ends, together with one of the said ends, serve as output terminals b, c of the circuit, the circuit comprising two, preferably movable, short-circuit bridges one of which interconnects the conductors a and b and the other interconnecting all of the three conductors.
  • the conductor c to which is connected the terminal common to the input and the output of the circuit, surrounds the two other conductors a and b.
  • FIG. 1 is (ci. irs- 44) 2 a longitudinal section and Figure 2 a cross-section of the impedance transformer.
  • the impedance transformer consists of three parallel conductors a, b and c. [The conductor c is tubular and surrounds the conductors a and b. The left-hand end of the conductors act as input terminals A and C and output terminals B and C of the circuit respectively.
  • a movable short-circuit bridge K1 Between the conductors a and b is provided a movable short-circuit bridge K1 and furthermore a movable short-circuit bridge K2 interconnects the conductors a, b and c. If-as shown in Figure l-an impedance Z2 is provided between the terminals C and B, an impedance Z1 is measured between the terminals A a-nd B.
  • the said impedance transformer has the property that any impedance Z2 can be transformed into any other impedance Z1 by a suitable adjustment of the short-circuit bridges K1 and K2, consequently by controlling or adjusting only two variable values.
  • the various conductors form pairs of lecher systems which are separated from each other and each of which must be adjusted by means of a short-circuit bridge.
  • these impedance transformers at least insofar as they are capable, similarly to the present transformer, of transforming some impedance into any other impedance, are much more complicated in regard to construction and operation, since there are at least three lecher systems so that three short circuit bridges must be adjusted.
  • the impedance transformer according to the invention is based on the recognition that by intercoupling the various lecher systems and by providing the short-circuit bridges in the manner referred to, the adjustment of the impedance transformer can be greatly simplified without the aforesaid property (the possibility of transforming some impedance into any other impedance) being lost.
  • a circuit arrangement for transmitting ultra-high-frequency electrical oscillations which comprises three substantially parallel conductors a, b, c, all of which are intercoupled and of which two of the ends at the same side serve to constitute input terminals a, c whereas the third of these ends, together with one of the said ends, serve as output terminals b, c of the circuit, the circuit comprising two, movable, short-circuit bridges one of which interconnects the conductors a and b and the other interconnecting all of the three conductors.
  • a circuit arrangement as claimed in claim l in which the conductor c, to which is connected conductors, a pair of output terminals connected to said end of said rst conductor 'andthe corresponding end of said third conductor, a rst shorting member interconnecting corresponding points on said rst, second and third conductors, and a second snorting member interconnecting corresponding points on said second and third conductors.
  • An ultra-high-frequency impedance transformation device comprising rst, second and third conductors arranged in parallel relation, a, pair of input terminals connected to correisponding ends of said rst and second conduc- 'tors, a pair of output terminals connected to said end of said lfirst conductor and the corresponding end of said third conductor, a first movable :bridge interconnecting said rst, second and third conductors, and a second movable bridge interconnecting said second and third conduc- Itors.
  • An ultra-high-frequency impedance trans- .formation device comprising -first, second and third conductors arranged in parallel relation. a pair of input terminals connected to correspondingr ends of said first and second conductors, apair of output terminals connected to said end of said first conductor and the corresponding end of said third conductor, said rst conductor being tubular and surrounding said second'and third conductors, a first movable bridge disposed within said rst conductor and interconnecting-al1 of said conductors, and a second movable shorting bridge disposed within said rst conductor and interconnecting said second and third conductors.

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  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
US685188A 1945-06-01 1946-07-20 Circuit arrangement for the transmission of ultra high frequency electrical oscillations Expired - Lifetime US2502766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2502766X 1945-06-01

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US2502766A true US2502766A (en) 1950-04-04

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US685188A Expired - Lifetime US2502766A (en) 1945-06-01 1946-07-20 Circuit arrangement for the transmission of ultra high frequency electrical oscillations

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US (1) US2502766A (enMihai)
DE (1) DE807105C (enMihai)
FR (1) FR927549A (enMihai)
NL (1) NL62741C (enMihai)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956420C (de) * 1952-03-01 1957-01-17 Siemens Ag Viertelwellenlaengen-Transformator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435153A (en) * 1934-08-21 1935-09-16 Gen Electric Co Ltd Improvements in or relating to the coupling of high frequency oscillation circuits
FR802881A (fr) * 1935-02-01 1936-09-17 Siemens Ag Système de transmission à haute fréquence
DE647149C (de) * 1932-11-13 1937-06-30 Siemens & Halske Akt Ges Verfahren zum Ausgleich des reflektierten Gegennebensprechens in Hochfrequenzuebertragungsanlagen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE647149C (de) * 1932-11-13 1937-06-30 Siemens & Halske Akt Ges Verfahren zum Ausgleich des reflektierten Gegennebensprechens in Hochfrequenzuebertragungsanlagen
GB435153A (en) * 1934-08-21 1935-09-16 Gen Electric Co Ltd Improvements in or relating to the coupling of high frequency oscillation circuits
FR802881A (fr) * 1935-02-01 1936-09-17 Siemens Ag Système de transmission à haute fréquence

Also Published As

Publication number Publication date
DE807105C (de) 1951-06-25
FR927549A (fr) 1947-10-31
NL62741C (enMihai)

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