Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Patent
1994-12-16
1996-03-05
Thomas, Laura
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
336232, H01F 500
Patent
active
054971373
ABSTRACT:
A balun transformer (10) may be constructed as a chip type transformer including a laminate (12) having first through fifth dielectric substrates (14a), (14b), (14c), (14d), and (14e) to be superimposed one on the other. An earth electrode (16) is formed on one main surface of the first dielectric substrate (14a), and an earth electrode (30) is formed on one main surface of the fifth dielectric substrate (14e). A connecting electrode (20) is formed on one main surface of the second dielectric substrate (14b). A first strip line (22) is formed on one main surface of the third dielectric substrate (14c). The first strip line (22) consists of a first spiral portion (24a) and a second spiral portion (24b). A second spiral strip line (26) and a third spiral strip line (28) are formed on one main surface of the fourth dielectric substrate (14d). The second strip line (26) and the third strip line (28) are electromagnetically connected with the first portion (24a) of the first strip line (22) and the second portion (24b) thereof, respectively.
REFERENCES:
patent: 3002260 (1961-10-01), Shortt et al.
patent: 4369557 (1983-01-01), Vandebult
patent: 5012571 (1991-05-01), Fujita et al.
patent: 5034710 (1991-07-01), Kawaguchi
patent: 5039964 (1991-08-01), Ikeda
patent: 5276421 (1994-01-01), Boitard
patent: 5381124 (1995-01-01), Roshen
Murata Manufacturing Co. Ltd.
Thomas Laura
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