Abstract: An external antenna is disclosed. The external antenna has a coaxial conductor assembly, a flexible circuit board, a passive element, and a support tube. The coaxial conductor assembly has a coaxial cable including an external conductor and an internal conductor insulated from the external conductor. The flexible circuit board is connected with the coaxial conductor assembly. The passive element is attached to the flexible circuit board and electrically connected to the external conductor and the internal conductor. The external conductor, the internal conductor, the flexible circuit board, and the passive element form an antenna loop. The flexible circuit board is wound around the support tube.

Abstract: An external antenna is disclosed. The external antenna has a coaxial conductor assembly, a flexible circuit board, a passive element, and a support tube. The coaxial conductor assembly has a coaxial cable including an external conductor and an internal conductor insulated from the external conductor. The flexible circuit board is connected with the coaxial conductor assembly. The passive element is attached to the flexible circuit board and electrically connected to the external conductor and the internal conductor. The external conductor, the internal conductor, the flexible circuit board, and the passive element form an antenna loop. The flexible circuit board is wound around the support tube.

Abstract: An antenna having a ground plane having an edge and a first antenna element extending substantially parallel to the edge is disclosed. A ground element electrically connects the first antenna element with the ground plane. A second antenna element extends substantially parallel to the first antenna element and is disposed between the edge and the first antenna element and is connected at one end of the second antenna element to the first antenna element with the remaining end of the second antenna element located closer to the ground element. A third antenna element is disposed so that the first antenna element is between the second antenna element and the third antenna element and the third antenna element at extends substantially parallel to the first antenna element, with a rear end electrically connected with the first antenna element and a remaining end of the third antenna element is electrically open.

Abstract: An antenna having a ground plane having an edge and a first antenna element extending substantially parallel to the edge is disclosed. A ground element electrically connects the first antenna element with the ground plane. A second antenna element extends substantially parallel to the first antenna element and is disposed between the edge and the first antenna element and is connected at one end of the second antenna element to the first antenna element with the remaining end of the second antenna element located closer to the ground element. A third antenna element is disposed so that the first antenna element is between the second antenna element and the third antenna element and the third antenna element at extends substantially parallel to the first antenna element, with a rear end electrically connected with the first antenna element and a remaining end of the third antenna element is electrically open.

Abstract: A planar antenna includes a ground plane having a ground point. A main radiating element has a feeding point positioned adjacent to the ground point. The main radiating element is positioned adjacent to a contact side of the ground plane such that a space is formed there between. A parasitic element is positioned adjacent to the contact side such that a space is formed there between. The main radiating element has a shape such that the space between the main radiating element and the contact side becomes larger as the main radiating element becomes closer to the parasitic element and the parasitic element has a shape such that the space between the parasitic element and the contact side becomes larger as the parasitic element becomes closer to the main radiating element. Additionally, the parasitic element may have a slit formed therein.

Abstract: A magnetic disk storage device has a magnetic disk with a storing/reproduction region formed thereon and a head slider facing the disk surface with a plurality of parallel projections to generate an air bearing. Magnetic heads each having a head gap are provided in the projections and have an interval between head gaps of at least 1/N of the width of the whole storing/reproduction region of the disk where N is the number of heads. The device makes it feasible to increase the number of heads per disk and to shorten the seek distance without increasing the weight of the head actuator.