Broadside-coupled transformers with improved bandwidth
AssigneeM/A-COM Technology Solutions Holdings, Inc.
InventorThomas A. Winslow
Life of this patent
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Abstract
A monolithic microwave integrated circuit (MMIC) compatible broadside-coupled transformer including (i) a first transmission line, (ii) a second transmission line, and (iii) a third transmission line. The first and the second transmission lines generally form the broadside-coupled transformer. The third transmission line is generally connected in series with the broadside-coupled transmission line forming a ground return path of the broadside-coupled transformer.
Claims20
A monolithic microwave integrated circuit (MMIC) compatible broadside-coupled transformer comprising:
- a first transmission line;
- a second transmission line;
- and
- a third transmission line, wherein the first and the second transmission lines form the broadside-coupled transformer and said third transmission line (i) is connected in series with the broadside-coupled transmission line forming a ground return path of the broadside-coupled transformer and (ii) has an electrical length of about one quarter wavelength at the half-wavelength freguency of the broadside-coupled transmission line forming the ground return path of the broadside-coupled transformer.
A method of reducing a half-wavelength resonance of a broadside-coupled transformer comprising:
- forming a first transmission line on a substrate;
- depositing a dielectric layer;
- forming a second transmission line on said dielectric layer;
- and
- forming a third transmission line, wherein the first and the second transmission lines form the broadside-coupled transformer and said third transmission line (i) is connected in polyimide. series with the broadside-coupled transmission line forming a ground return path of the broadside-coupled transformer and (ii) has an electrical length of about one quarter wavelength at the half-wavelength frequency of the broadside-coupled line forming the ground return path of the broadside-coupled transformer.
Dependencies are inferred from the claim text.