Patent ID: 6531943
Filing Date: 2003-03-11
Classification: H01F,H03H

Abstract:
A balun-transformer, which is manufactured by chemical etching accompanied with microwave circuit manufacturing processes and designed by the odd mode analysis and commercial simulation software, is comprising by:a unbalanced input port; a balanced output port; an impedance matching circuit to match a transition output resistance and a load resistance, wherein the impedance matching circuit includes: a first capacitor is connected to the balanced output node of a conductor-backed coplanar waveguide (CBCPW) to conductor-backed coplanar stripline (CBCPS) transition, both ends of the first capacitor and both ends of a second capacitor are inserted with a first inductor and a third inductor in series, and both ends of the second capacitor and both ends of the load resistor are inserted with a second inductor and a fourth inductor in series.