RF CIRCUIT WITH MULTIPLE-DEFINITION RF SUBSTRATE AND CONDUCTIVE MATERIAL VOID UNDER A BIAS LINE

摘要

An RF circuit includes a first dielectric material, a signal line and a bias line over a first surface of the first dielectric material, a conductive layer over a second surface of the first dielectric material, and a second dielectric material over the conductive layer. The first and second dielectric materials have different dielectric constants. The conductive layer includes a ground plane over which the signal line is formed. A conductive material void, with which a section of the bias line is aligned, is present in the second conductive layer. The RF circuit further includes a mounting area for an RF device. First ends of the signal line and the section of the bias line are located proximate to the mounting area to enable the signal line and the bias line to be electrically coupled with one or more leads of the RF device.

主权项

1. A radio frequency (RF) circuit comprising:
a first dielectric material having first and second surfaces and a first dielectric constant; a first conductive layer over the first surface of the first dielectric material, wherein the first conductive layer includes a plurality of conductive features that include a signal line and a bias line, wherein the signal line has a first end and a second end, and the bias line has a first section with a first end and a second end; a second conductive layer over the second surface of the first dielectric material, wherein the second conductive layer includes a ground plane, and the signal line is formed directly over the ground plane, and wherein a conductive material void is present in the second conductive layer, and the first section of the first bias line is aligned with the conductive material void; a second dielectric material over the second conductive layer, wherein the second dielectric material has a second dielectric constant that is different from the first dielectric constant; and a mounting area for an RF device, wherein the first end of the signal line and the first end of the first section of the bias line are located proximate to the mounting area to enable the signal line and the bias line to be electrically coupled with one or more leads of the RF device.