Microstrip line having a linear conductor layer with wider and narrower portions

• US 6,768,400 B2
• Filed: 04/20/2001
• Issued: 07/27/2004
• Est. Priority Date: 04/20/2000
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Tanabe, Mitsuru
• Primary Examiner(s): Lee, Benny T.
• Application Number:
  US09/838,214
• Publication Number:
  US 20010033210A1
• Time in Patent Office: 1,194 Days
• Field of Search: 333/238, 333/246
• US Class Current: 333/238
• CPC Class Codes: H01P 3/088 Stacked transmission lines

Abstract

A microstrip line includes a ground conductor layer, a dielectric layer formed on the ground conductor layer, and a linear conductor layer formed on the dielectric layer to have a linear configuration. The linear conductor layer has a wider portion in the upper part of a cross section thereof taken in a direction perpendicular to the direction in which the linear conductor layer extends and a narrower portion in the lower part of the cross section. The narrower portion is smaller in width than the wider portion.

Claims

1. A microstrip line comprising:

a ground conductor layer;

a dielectric layer disposed on the ground conductor layer;

a linear conductor layer disposed on the dielectric layer to have a linear configuration, the linear conductor layer having a wider portion in an upper part of a cross section thereof taken in a direction perpendicular to a direction in which the linear conductor layer extends and a narrower portion in a lower part of the cross section, the narrower portion being smaller in width than the wider portion and a substrate for holding the ground conductor layer, the substrate being located under the ground conductor layer and being composed of a dielectric material, wherein the dielectric layer has a dielectric constant higher than a dielectric constant of the substrate,

wherein the dielectric layer contains a titanium oxide.

2. A microstrip line comprising:

a ground conductor layer;

a dielectric layer disposed on the ground conductor layer;

a linear conductor layer disposed on the dielectric layer to have a linear configuration, the linear conductor layer having a wider portion in an upper part of a cross section thereof taken in a direction perpendicular to a direction in which the linear conductor layer extends and a narrower portion in a lower part of the cross section, the narrower portion being smaller in width than the wider portion and a substrate for holding the ground conductor layer, the substrate being located under the ground conductor layer and being composed of a dielectric material, wherein the dielectric layer has a dielectric constant higher than a dielectric constant of the substrate, wherein the dielectric layer contains a titanium oxide, and

wherein the titanium oxide is a strontium titanate.