HIGH FREQUENCY IMPEDANCE TRANSFORMER

摘要

PURPOSE:To increase the transformation ratio by connecting plural dielectric substrates provided with a circuit comprising a microstrip line, increasing the dielectric constant of the substrate higher at a low impedance terminal side and decreasing that lower toward a high impedance side. CONSTITUTION:A pattern 205 of a transformer of a distributed constant is formed on a high dielectric constant substrate 202 and a pattern 206 of transformer is formed on a low dielectric constant substrate 203. Further, the pattern 205 is connected to the low impedance terminal 201 and the pattern 206 is connected to the high impedance terminal 204. The dielectric constant of the substrate is formed highest at the low impedance terminal 201 and is lowered sequentially toward the high impedance terminal 204. Then a large transformation ratio is taken and the loss is decreased with a broad band.