GB784372A - Wide band radio-frequency transformer - Google Patents

Wide band radio-frequency transformer

Info

Publication number
GB784372A
GB784372A GB32285/55A GB3228555A GB784372A GB 784372 A GB784372 A GB 784372A GB 32285/55 A GB32285/55 A GB 32285/55A GB 3228555 A GB3228555 A GB 3228555A GB 784372 A GB784372 A GB 784372A
Authority
GB
United Kingdom
Prior art keywords
windings
winding
balanced
strips
nov
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
GB32285/55A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB784372A publication Critical patent/GB784372A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

784,372. Transformers. STANDARD TELEPHONES & CABLES, Ltd. Nov. 11, 1955 [Nov. 11, 1954; Sept. 7, 1955; Oct. 19, 1955], No. 32285/55. Class 38 (2). A wide-band radio frequency transformer comprises a first balanced winding P consisting of two substantially symmetrical parts, a second balanced winding S also consisting of two symmetrical parts, the two balanced windings being spirally wound from metal strips or the like so as to be closely coupled, a balanced circuit being connected across one of the windings whilst an unbalanced circuit Z2 is connected across one part only of the other winding. The transformer windings are constructed of strips P, S having the requisite dimensions as determined by the transforma. tion ratio, the strips being provided with terminals A, B, M, D, E and being laid one above the other together with insulating members K. The assembly is then wound around a suitable magnetic core of high frequency material in a spiral manner as shown in Fig. 3. Since one section of each of the windings P, S is closer to the magnetic core than the other section, the differences in leakage inductances and selfcapacitances are compensated for by changing the thickness of the insulation K along the strip, by variation in the widths of the metal strips or by differences in the lengths of the two sections in each winding. When a greater transformation ratio is required one or more of the turns of the strip may be replaced by a plurality of serially-connected turns as shown in Fig. 9.
GB32285/55A 1954-11-11 1955-11-11 Wide band radio-frequency transformer Expired GB784372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU784372X 1954-11-11

Publications (1)

Publication Number Publication Date
GB784372A true GB784372A (en) 1957-10-09

Family

ID=3758503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32285/55A Expired GB784372A (en) 1954-11-11 1955-11-11 Wide band radio-frequency transformer

Country Status (1)

Country Link
GB (1) GB784372A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2024822A1 (en) * 1968-11-08 1970-09-04 Siemens Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2024822A1 (en) * 1968-11-08 1970-09-04 Siemens Ag

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