Abstract: A surface mount antenna having increased mechanical strength, and whose properties do not deteriorate when exposed to heat and moisture. The surface mount antenna includes a substrate, and a conductive portion in or on the substrate, with an electrical supply terminal formed on a surface of the substrate in order to apply voltage to the conductive portion. A covering material is provided to cover the substrate by coating, dipping, or the like.

Abstract: A meander line antenna includes a rectangular-parallelopiped base member made from a dielectric material having barium oxide, aluminum oxide, and silica as main components, a meander-shaped conductor having, e.g., 10 corners made of copper or a copper alloy by printing, deposition, pasting, or plating inside the base member, and a power-feed terminal for applying a voltage to the conductor. The meander-shaped conductor is formed in the longitudinal direction of the base member. One end of the conductor is led to a surface of the base member to form a power-feed section and is connected to the power-feed terminal. The other end of the conductor serves as an open end inside the base member.

Abstract: A chip antenna in which desired antenna characteristics can be obtained without restricting the type of at least one of a dielectric material and a magnetic material used for a base member of the antenna, as well as the type of metal material used for a conductor, or without limiting the sintering conditions of the above-described materials. The chip antenna includes a rectangular-prism-shaped base member having a mounting surface. A conductor, e.g. silver, is spirally wound inside the base member. A feeding terminal is formed over surfaces of the base member so as to feed power to the conductor. One end of the conductor is extended to a surface of the base member to form a feeding section, which is connected to the feeding terminal. The other end of the conductor serves as a free end within the base member. The base member is produced by laminating mixture layers made from a mixture of glass essentially consisting of borosilicate having a softening point of approximately 700.degree. C.

Abstract: A matching circuit and an antenna apparatus which, though small-sized, can be used in a radio apparatus which transmits and receives radio waves having a wide range of frequencies. A matching circuit includes an inductance element formed of a chip inductor connected in series with an antenna body, a first capacitance element formed of a trimmer capacitor, and a second capacitance element formed of a chip capacitor, which capacitance elements are connected between respective ends of the inductance element and a ground terminal, and thus in parallel to the antenna body. One end of the inductance element is connected to the power supply terminal of the antenna body, and the other end is connected to a power source for applying a voltage to the antenna body. The first capacitance element is connected between a ground and the connection point of the power supply terminal of the antenna body and the inductance element.

Abstract: 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.

Abstract: A miniature chip antenna which can be utilized as an antenna for use in a high-frequency region is provided. The chip antenna comprises a substrate, at least one conductor, and at least one feeding terminal. The substrate comprises a dielectric material portion and a magnetic material portion, at least a part of the magnetic material portion being exposed to the exterior of the substrate. The conductor is formed at least either on the surface of the substrate or inside the substrate. The feeding terminal is provided on the surface of the substrate to impress a voltage on the conductor.

Abstract: A high-frequency composite component used for a multi-band system, includes first and second circuits connected in parallel, the first and second circuits having infinite input impedances respectively at first and second frequencies, corresponding to first and second bands. Each of the first and second circuits includes a phase shifter, and a trap circuit connected as a load of the phase shifter. The phase shifter of each of the first and second circuits includes a strip line having a length of .lambda./4, wherein .lambda. is a wavelength corresponding to one of the first and second frequencies. The trap circuit of each of the first and second circuits includes a series resonance circuit, and the trap circuit resonates at one of the first and second frequencies.

Abstract: A chip antenna having a substrate comprising either of a dielectric material or a magnetic material, at least one conductor formed on at least one side of a 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 conductor, a part of the conductor connecting with the feeding terminal. The end section of the conductor or a portion of the conductor other than an end section of the conductor may be connected with the feeding terminal.

Abstract: A small radio communication unit which requires no antenna adjustment is provided by using small chip antennas whose gain is not degraded and which have a wide bandwidth.

Abstract: An antenna includes a dielectric substrate, an input/output electrode, a metal wire, and a metal cap. The metal wire is coiled so that its forward end is connected to the input/output electrode through a connecting electrode and a lead electrode while its another end is connected to an inner surface of a top plate of the metal cap. The metal cap is fixed onto a major surface of the dielectric substrate.

Abstract: A resonator having an improved spurious characteristic is provided. The resonator comprises a dielectric substrate having a plurality of strip lines extending longitudinally from the central portion of the upper surface toward the rear surface of the substrate by turning downward along the shorter side surfaces of the substrate such that the strip lines extending from both sides of the upper surface of the substrate are arranged in an alternative fashion with their narrowed top end portions overlapping each other in spaced apart relationships so as to be electromagnetically coupled. The portion of the dielectric substrate sandwiched between the opposing upper and rear portions of each strip line forms a capacitor. Further, a ground electrode is formed at the center of the rear surface of the substrate so as to be connected to the end portions of the strip lines. Input and an output electrode continuous with some of the strip lines, respectively, are also provided on the rear surface of the substrate.

Abstract: A chip antenna comprising a substrate comprising either of a dielectric material or a magnetic material, at least one conductor formed on at least one side of the surface and the inside of the substrate, and at least two feeding terminals provided on the surface of the substrate for applying a voltage to the conductor, at least two feeding terminals being provided to at least one conductor among the above conductors.

Abstract: An antenna apparatus having a predetermined impedance is provided. The apparatus has a chip antenna including a conductor and a mounting board on which the antenna is mounted. A ground pattern and a microstrip line are formed on the board. A feeding terminal for applying a voltage to the conductor is deposited on the surface of the antenna. Solder may be used to connect the feeding terminal of the antenna to the microstrip line formed on the board. A capacitance generating device, e.g., a dielectric resin or capacitor is disposed between the microstrip line connected to the feeding terminal of the antenna and the ground pattern. A capacitance is thus generated between the microstrip line and the ground pattern thereby enabling regulation of the antenna apparatus impedance and bandwidth.

Abstract: A chip antenna comprising a rectangular substrate essentially comprising barium oxide, aluminum oxide and silica; a conductor which is formed inside the substrate and spiralled along the longitudinal direction thereof; a feeding terminal provided on the side and bottom faces of the substrate so as to apply a voltage to the conductor; and a grounding terminal which is provided on the side and bottom faces of the substrate and connects to a grounding electrode on a mounting board at the time of packaging. One end of the conductor forms a feeding end connecting to the feeding terminal and the other end forms a free end in the substrate. Capacitance is generated between a portion of the conductor and the grounding terminal.

Abstract: A chip antenna which provides a high gain and large band width and which makes it possible to achieve a reduction in the size of the chip antenna. The chip antenna has a dielectric base which is formed as a rectangular parallelepiped containing a spirally wound conductor whose winding axis is perpendicular to the longitudinal dimension of the dielectric base and parallel to the mounting surface. The configuration of the winding cross section S, which is perpendicular to the winding axis of the conductor, is a rectangle whose longitudinal vertical dimension is H and whose horizontal dimension is W. One end of the conductor is led out to the surface of the dielectric base to form a feeding end that is connected to a feeding terminal for applying a signal to the conductor, and the other end thereof forms a free end within the dielectric base.

Abstract: A chip-type electronic component comprising at least one electronic component element which is mounted on a substrate. The electronic component element is provided on its upper portion with a flat surface which can be engaged by a suction nozzle.

Abstract: An antenna unit whose resonance frequency is switchable, the antenna unit including an antenna body (11) having a distributed inductance component (L.sub.1), an impedance adjusting inductance component (L.sub.1) and a capacitance (C.sub.1) provided between the same and the ground potential, and a capacitor (C.sub.2) and a diode (D.sub.1) being connected in parallel with the capacitance (C.sub.1) and in series with each other, so that a voltage for bringing the diode (D.sub.1) into an ON or OFF state is applied to a node (16) between the capacitor (C.sub.2) and the diode (D.sub.1), thereby switching the resonance frequency of the antenna unit by switching ON and OFF states of the diode (D.sub.1).

Abstract: An antenna is formed by attaching a metallic chassis to a dielectric base plate on which are formed an input electrode, a connector electrode and grounding areas. The metallic chassis has a planar part serving as its radiating part and attachment parts formed by bending mutually opposite edge parts of this planar part substantially perpendicularly thereto, and the input electrode, the connector electrode and one of the grounding areas are each connected to either of the attachment parts. An antenna unit is formed by mounting the metallic chassis of such an antenna inside an opening formed in a printed circuit board on which are formed a feed electrode and grounding electrodes formed with an edge portion of each abutting this opening and by connecting the input electrode to the feed electrode, and the grounding electrode to one of the grounding areas.

Abstract: An electronic component which is employed in the frequency range in the microwave band or above is mounted on a circuit board. The circuit board comprises two linear transmission line members, a ground electrode, and an electric insulating substrate provided with the transmission line members and the ground electrode on its major surface. The electronic component comprises external electrodes which are formed on its side surfaces. Holding patches which are formed on the lower surface of the electronic component are bonded to the ground electrode by solder members, thereby fixing the electronic component to the circuit board. At this time, small clearances are defined between the electronic component and the circuit board through the solder members, whereby the external electrodes are electromagnetically coupled with the transmission line members and the ground electrode through the clearances respectively.

Abstract: Disclosed herein is a mobile communicator comprising an antenna (3) built in a portable telephone body (1), and a circuit board (2) built in the communicator body (1) and provided with a ground electrode pattern (2a) arranged between an outer surface part (1a), which is brought into contact with or near a portion of a human head, and the antenna (3). A transmission output of the antenna (3) toward the human head is attenuated by the ground electrode pattern (2a) of the circuit board (2).