摘要:
A chip antenna comprising a basic body made of a ceramic material; a first conductor and a second conductor respectively disposed at least either inside or on the surface of the basic body so as to be close to each other; a feeding terminal for applying a voltage to the first conductor disposed on the surface of the basic body and connected to the first conductor; and a grounding terminal disposed on the surface of the basic body and connected to the second conductor.
摘要:
The invention provides a chip antenna comprising: a substrate made by laminating a plurality of sheet layers made of ceramic; a radiating conductor having substantially planar shape and provided on said substrate; a grounding conductor having substantially planar shape and provided so as to oppose said radiating conductor with said sheet layers interposed in between; a capacitor conductor having substantially planar shape and provided so as to oppose said radiating conductor and said grounding conductor with said sheet layers interposed in between; a first shorting conductor which connects said radiating conductor and said grounding conductor; a second shorting conductor which connects said grounding conductor and said capacitor conductor; a feed terminal connected to said radiating conductor or said capacitor conductor; and a ground terminal connected to said grounding conductor. According to the above a chip antenna, the resonance frequency can be adjusted readily with compact size can be achieved.
摘要:
A chip antenna 10 includes, inside a rectangular-parallelepiped base 11 having barium oxide, aluminum oxide, and silica as main constituents, a conductor 12 wound in a spiral form along the length direction of the base 11, and an LC parallel resonance circuit 13, which is inserted in the intermediate portion of the conductor 12 and which is connected electrically in series with the conductor 12, and includes, on the surface of the base 11, a power-feeding terminal 14 for applying a voltage to the conductor 12. The conductor 12 is separated into a first conductor 121 and a second conductor 122 by the LC parallel resonance circuit 13. The LC parallel resonance circuit 13 is formed of a coil L1, which is an inductance element, and a capacitor C1, which is a capacitance element, which are connected in parallel.
摘要:
A chip antenna in which correct evaluation and inspection of a conductor can be performed regardless of the state of grounding. The chip antenna has a rectangular-prism-shaped substrate formed of a dielectric material comprising, e.g., barium oxide, aluminum oxide and silica. A copper or copper-alloy conductor is spirally wound within the substrate in the longitudinal direction. A feeding terminal for applying a voltage to the conductor and a free terminal are disposed on the surfaces of the conductor. One end of the conductor is attached to the feeding terminal, while the other end is connected to the free terminal.
摘要:
A mobile cellular telephone 10 has a case 11 which is formed of frame portions 11a through 11f made of, for example, a reinforced plastic, a non-directional chip antenna 12, a circuit board 13 having the chip antenna 12 on one major surface (first major surface) 13a, and a copper-made reflective plate 14, which serves as means for attenuating a transmission output of the chip antenna 12. The reflecting plate 14 is provided between the circuit board 13 and the frame portion 14e in such a manner that it faces the first major surface 13a of the circuit board 13 with an intervening gap. Also, the reflecting plate 14 is connected to the ground pattern 19.
摘要:
A chip antenna comprising a substrate comprising at least one material selected from dielectric materials and magnetic materials, at least two conductors formed on at least one surface of the substrate or inside the substrate, and at least one feeding terminal provided on the surface of the substrate for applying a voltage to the conductors.
摘要:
A small-sized antenna device in which the conductor length can be reduced without encountering a reduction in gain. The antenna device is constructed by mounting a main antenna unit on a mounting substrate having a transmission line formed on the upper surface of the mounting substrate and also having a ground electrode formed on the back surface. One end of the transmission line is connected to a feeding terminal of the main antenna unit, and the other end of the transmission line is connected to a radio-frequency circuit of a radio communication device in which the antenna device is installed. The ground electrode is grounded.
摘要:
A compact non-directional chip antenna. The chip antenna includes a rectangular-parallelopiped base made of printed circuit boards (specific inductive capacity: about 2 to 6) having a glass epoxy resin or glass fluororesin as main constituents, a conductor, made of copper or a copper alloy, which is wound in the shape of a spiral inside the base along the direction of the length of the base, and a power feeding terminal, for applying a voltage to the conductor, on the surface of the base. One end of the conductor forms a power feeding section and is connected to the power feeding terminal. The other end of the conductor forms a free end inside the base.
摘要:
A miniature chip antenna suitable for use in low-frequency-band mobile communications is disclosed. The chip antenna has a rectangular-prism-shaped base member provided with a mounting surface. Disposed within the base member is a conductor spirally wound along the height of the base member. The base member is formed from e.g., ferrite comprising Ni--Zn having a relative magnetic permeability of 7. The conductor is made from a metal comprising, e.g., Cu, Ni, Ag, Pd, Pt, or Au, and is formed by printing, depositing, laminating or plating. The base member and the conductor are then integrally sintered. A conductor having a rectangular cross section and spirally wound along the height of the base member is thus formed within the base member.
摘要:
A chip antenna comprising a substrate comprising at least one material selected from a dielectric material and a magnetic material, at least one conductor formed at least one of in the interior of the substrate and on the surface of the substrate, at least one feeding terminal provided on the surface of the substrate and connected to an end of the conductor for applying a voltage to the conductor, and at least one capacitor-forming conductor provided at least one of in the interior of the substrate and on the surface of the substrate and connected to the other end of the conductor. An antenna device comprising an antenna main body and a mounting board for mounting the antenna main body is also disclosed. The antenna main body may have the same configuration as the above-described chip antenna.