I-inductor as high-frequency microinductor

• US 6,788,183 B2
• Filed: 01/13/2003
• Issued: 09/07/2004
• Est. Priority Date: 07/14/2000
• Status: Expired due to Fees

• Current Assignee: Forschungszentrum Karlsruhe Gmbh
• Original Assignee: Forschungszentrum Karlsruhe Gmbh
• Inventors: Fergen, Immanuel, Von Der Weth, Axel, Seemann, Klaus
• Primary Examiner(s): MAI, ANH T
• Application Number:
  US10/347,153
• Publication Number:
  US 20030160675A1
• Time in Patent Office: 603 Days
• Field of Search: 336/200, 336/223, 336/232, 336/83, 336/174, 336/175, 336/212, 336/602.1, 296/021
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 17/045 with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core

Abstract

In an I-conductor for the high-frequency or microwave systems, two uniform cores are disposed parallel to each other with a gap therebetween and a coil is disposed on each core in such a way that, when energized by an HF current, a magnetic circuit through the two cores is generated by way of the gap at one end of the arrangement. The magnetic field forming windings are uniform. As cores, magnetically anisotropic materials may be used.

Claims

1. An I-inductor in the form of a high frequency-micro-inductor (HF inductor) for microsystems, comprising:

adjacent cores of a magnetic permeable material, which are arranged in a rectangularly limiting plane with a gap therebetween and which are band-like and have parallel longitudinal axes and the same length and a cross-section sufficient to accommodate a predetermined magnetic flux, said cores being provided with a winding such that, upon energization of the winding, the magnetic flux generated by a turn of the winding in immediately adjacent cores extends fully in the magnetic material of the cores and the magnetic field generated in each core has a direction in which the flux in the adjacent core is amplified.

2. An I-inductor according to claim 1, wherein said cores consist of a magnetically isotropic material.

3. An I-inductor according to claim 2, wherein the magnetically isotropic material is uni-directionally or uni-axially isotropic.

4. An I-inductor according to claim 3, wherein said inductor includes two outer cores, which have the same width and at least one inner core disposed between the outer cores, said at least one inner core being at least as wide as the outer cores.

5. An I-inductor according to claim 4, wherein each core is provided with a winding formed by a solenoid.

6. An I-inductor according to claim 4, wherein the windings comprise a flat conductor which is provided at its opposite ends with a tab for an external connection.

7. An I-inductor according to claim 4, wherein the windings form together with the cores a woven structure.

8. An I-inductor according to claim 6, wherein the windings consist of flat conductor elements extending around two cores, said conductor elements being uniformly trapezoidal and being disposed adjacent to, and in contact with, each other in the gap between the two cores along the shorter of the two parallel trapezoid sides and along the respective outer longitudinal edge of the two bodies/cores with the longer of the two parallel trapezoid sides.

9. An I-inductor according to claim 6, wherein the windings consist of flat conductor elements ex tending around more than two cores, said conductor elements of a winding disposed on the two outer cores are uniformly trapezoidal and those disposed on the inner bodies/cores are uniformly rectangular, the trapezoidal elements of the winding are disposed adjacent to, and in contact with, the respective outer edges of the two outer cores, with the longer of the two parallel trapezoid sides and in the gaps between the two outer cores and the respective adjacent core are disposed adjacent to, and in contact with, a rectangular element of the winding with sides of equal length along the respective shorter sides of the two parallel trapezoidal sides of an element of the turn and, in the gap between the inner cores, always two rectangular elements of the turns are disposed adjacent, and in contact with, each other so that the turns are disposed with the cores in an insulating spaced relationship in a web-like form adjacent one another and at both ends of a winding, there is a tab for an external connection.