Radio frequency transformer

• US 3,961,292 A
• Filed: 05/19/1975
• Issued: 06/01/1976
• Est. Priority Date: 01/02/1974
• Status: Expired due to Term

• Current Assignee: Ross Alan Davis
• Original Assignee: Ross Alan Davis
• Inventors: Davis, Ross Alan
• Primary Examiner(s): Gensler, Paul L.
• Application Number:
  US05/578,642
• Time in Patent Office: 379 Days
• Field of Search: 343/712, 343/859, 343/860, 343/865, 333/24 R, 333/32, 325/376, 325/381, 325/385, 336/84, 336/174, 336/175, 336/195, 336/229
• US Class Current: 333/32
• CPC Class Codes: H03H 7/38 Impedance-matching networks

Abstract

An improved radio-frequency transformer, particularly useful in conductive-body antenna systems, is provided in which telescoping of two or more portions of the primary of the transformer results in increased compactness, high effeciency and decreased cost.

Claims

1. A radio-frequency transformer system, including:

a source of push-pull radio-frequency signals having first and second output terminals at respective ones of which radio-frequency signals of substantially equal amplitude but opposite phase appear;

a transformer primary having first and second hollow tubular portions, said second portion being nested within but electrically insulated from said first portion; and

,

a secondary winding including multiple turns of an electrical conductor passing through the inner opening of said second portion of said primary;

said first and second portions of said primary each having a first and a second end, said first end of said first portion being coupled to said first output terminal, said first end of said second portion being coupled to said second output terminal;

said first end of said first portion being juxtaposed to said second end of said second portion and said first end of said second portion being juxtaposed to said second end of said first portion.

2. Apparatus according to claim 1 which includes, in addition, resonating means for resonating said secondary winding at a predetermined radio frequency.

3. Apparatus according to claim 2 in which said resonating means includes a variable condenser.

4. Apparatus according to claim 1 which includes, in addition, a third hollow tube of conductive material interposed between said second portion of said primary and said secondary winding, said third hollow tube being connected to ground potential substantially at its midpoint.

5. Apparatus according to claim 4 which includes, in addition, capacitive means for resonating said secondary winding.

6. Apparatus according to claim 5 which includes, in addition, ferrite beads surrounding said first portion of said primary.

7. Apparatus according to claim 1 in which said first and second portions of said primary have their ends substantially co-terminant.