Patent ID: 8462465
Filing Date: 2013-06-11
Classification: G11B

Abstract:
1. A head gimbal assembly, comprising: a magnetic head slider provided with a recording head element that applies a recording magnetic field to a magnetic recording medium; and a suspension that supports the magnetic head slider, wherein the magnetic head slider further includes a microwave radiation element that radiates a microwave magnetic field from a microwave excitation current that is supplied from a microwave generating circuit, and that applies the microwave magnetic field to the magnetic recording medium when the recording head element applies the recording magnetic field to the magnetic recording medium, the suspension includes a microwave transmission line that transmits the microwave excitation current, the microwave transmission line is provided with a matching circuit to achieve impedance matching with the microwave radiation element, the microwave transmission line includes a main transmission line that connects the microwave generating circuit with the magnetic head slider, and a branch line that branches from the main transmission line, and the matching circuit includes a first conductive line and a second conductive line, the first conductive line configuring a section in the main transmission line from the magnetic head slider to a branch part of the branch line, the second conductive line configuring the branch line.