118results about How to "Good antenna characteristics" patented technology

A hemispherical Luneberg dielectric lens including a hemispherical center layer having a hemispherical outer surface, and a plurality of hemispherical dome-shaped layers each having concentric hemispherical inner and outer surfaces, the outer surfaces of the center layer and dome-shaped layers having different diameters and the inner surfaces of said dome-shaped layers having different diameters. The center layer and dome-shaped layers are successively concentrically fitted into one another and integrated into a hemispherical shape. The center layer is a foam molding of ceramic-containing thermoplastic resin expanded beads, while each of said dome-shaped layers is a foam molding of thermoplastic resin expanded beads containing 0 to 80% by weight of a ceramic. The ceramic content per unit volume of the center and dome-shaped layers decreases from the center layer to the outermost dome-shaped layer, and the standard deviation of the apparent density of each of the center and dome-shaped layers is 0.07 g / cm3 or lower.

In an antenna apparatus proposed by the present invention, two inverted-F antennas having the same characteristics are supplied with power with phase difference of 180 degrees respectively. Therefore only radio wave of polarized wave in a predetermined direction can be radiated and deterioration in antenna characteristics due to leak currents can be prevented.

A portable wireless unit of the invention has a first plane antenna smaller than an antenna size determined by a desired frequency, and a second plane antenna presenting an antenna size determined by the desired frequency on the whole by coupling with the first plane antenna.

The invention broadly contemplates an electronic apparatus that provides improved antenna characteristics, while maintaining a thin size and light weight. The electronic apparatus of the present invention includes a display casing having a nonconductive resin region and a conductive resin region in a bottom surface thereof; a display module accommodated in the display casing; an antenna disposed in the nonconductive resin region; and a system casing accommodating a wireless module connected to the antenna. By disposing the antenna in the nonconductive resin region formed in the bottom surface of the display casing, it is possible to secure high radio wave sensitivity while preventing an antenna mounting portion from being exposed to the outside of the display casing. The casing structure of the electronic apparatus does not become thick because of butt joining even when the joint portions are in a projection area of an LCD module.

The vehicle antenna includes a frame made of conductive material and surrounding sides of a display section of a monitor display device mounted on a vehicle, and a radiation element attached to the frame. The frame serves as a ground plane of the vehicle antenna. The radiation element is situated in such a position that the radiation element is covered by a front panel escutcheon of the monitor display device.

Antenna apparatus, and an associated method, for a mobile station, or other radio device. A folded conducting strip is formed upon multiple sides of a cube-shaped, or other three-dimensional substrate of small dimensions. The conducting strip exhibits resonance at multiple frequencies, such as at frequencies encompassing the 800 / 900 / 1800 / 1900 / 2200 MHz frequencies. Because of the positioning of the conducting strip upon the multiple sides of the substrate, a conducting strip of increase length is provided while permitting the dimensional requirements of the antenna structure to be small. Multiple antennas are able to be positioned at the radio device to provide for multiple-input, multiple-output radio operation.

An integrated multiband antenna with broadband function comprises a grounding surface, a feed-in line, a first metal radiator, a second metal radiator, a grounding metal radiator and a parasitic metal radiator, wherein, the first metal radiator is connected with the positive terminal of a signal of the feed-in line to produce a first high frequency modal. Meanwhile the first metal radiator couples the energy and feeds the energy into the second metal radiator and the parasitic metal radiator and cooperates with the grounding metal radiator to produce respectively a low frequency modal and a second high frequency modal so as to create the broadband effect. The invention uses a multiple antenna integration structure to provide the multiband antenna with enough frequency width so as to meet the system requirements of AMPS(824-894MHz) / GSM(880-960MHz) / GPS(1575MHz) / DCS(1710-1880MHz) / PCS(1850-1990MHz) / UMTS(1920-2170MHz) / Wi-Fi(2400-2500MHz).

A combination of a radio frequency identification transponder (RFID Tag) and to a magnetic electronic article surveillance (EAS) device is disclosed. The present invention relates generally to radio frequency identification (RFID) systems, and more specifically to RFID transponders for use in RFID systems and the method for their assembly.

A wireless communication device includes: a high frequency circuit for generating a high frequency signal, the high frequency circuit being provided on a high-frequency-circuit surface of an integrated antenna module substrate mounted on a mounting substrate; a patch antenna for irradiating radio waves indicative of the generated high frequency signal, the patch antenna being provided on an antenna surface of the integrated antenna module substrate; and a ring-shaped grounding surface provided on the antenna surface of the integrated antenna module substrate so as to surround the patch antenna. This allows reducing surface waves irradiated from the end of the integrated antenna module substrate and improving antenna characteristics.

An antenna structure includes a metal member, a first antenna, a second antenna, a third antenna, and a fourth antenna. A gap is defined on the metal member to divide the metal member into a first frame assembly and a second frame assembly. The first frame assembly and the second frame assembly cooperatively form a receiving space for accommodating at least one electronic element. The first antenna, the second antenna, the third antenna, and the fourth antenna are received in the receiving space. The first antenna is electronically connected to the first frame assembly of the metal member. The third antenna and the fourth antenna are both electronically connected to the second frame assembly of the metal member.

In a tunable antenna apparatus, a dielectric block is mounted on a printed circuit board. A radiation pattern has a feeding part formed on the dielectric block and connected commonly to a feeding source and a variable DC power. Also, a connecting pattern extends from the radiation pattern onto the printed circuit board. In addition, at least one tuning pattern is formed on the printed circuit board and connected in series to the connecting pattern via at least one switching device.

A small-sized mobile radio has a built-in antenna is high enough to enhance the antenna characteristics. In the mobile radio, a base plate is structured by a section (antenna-housing section) including a supply portion and a short-circuiting portion, for example, of an antenna element which affect the antenna characteristics, and a section (circuit-housing section) which is the rest of the base plate. The antenna-housing section is so positioned so as to keep the built-in antenna high enough, that is, to keep the space between the base plate and the antenna element large enough. On the other hand, the circuit-housing section is positioned toward the back of the cabinet to provide room for a display and a key section.

A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 1013 Ω·m or above and 40 or below, respectively.

A microwave antenna for wireless interconnection of automation devices has a first printed circuit board, on which a first conductor loop is arranged as a printed conductor track. A second printed circuit board having a second conductor loop in the form of a printed conductor track is arranged transversely with respect to the first printed circuit board. The second printed circuit board is attached to the first printed circuit board. The conductor loops are connected to a common feed connection. A bypass line connects one end of each the first and the second conductor loops.

An IC card 10A has a mica capacitor that comprises a mica film 1 and electrodes 6a, 6b formed on both sides thereof, where the mica film 1 serves as a mounting substrate for an antenna coil 2 and an IC chip 3, thereby reducing profile of an IC card and also reducing its cost of manufacture and to stabilize its resonance frequency.

The invention relates to an electronic device and manufacture method thereof, capable of providing good antenna characteristic and realizing miniaturization. The electronic device includes: a first molded body having a recessed cross section and made of resin; a second molded body having a recessed cross section and made of resin, the second molded body being fitted inside the first molded body; and an antenna pattern sandwiched between the first and second molded body. Among the surfaces of the first molded body, the surface on the side not adjacent to the antenna pattern constitutes an outer surface. The invention also provides the manufacture method of the electronic device.

An antenna module (1) includes a substrate (100) including a first flat plate portion (100a) and a second flat plate portion (100b) that have respective normals intersecting with each other and that are continuous, first patch antennas (10a to 10d) that are formed on the first flat plate portion (100a) and second patch antennas (20a to 20d) that are formed on the second flat plate portion (100b). The first patch antennas (10a to 10d) are arranged in at least a column in a column direction parallel to a boundary line (B) between the first flat plate portion (100a) and the second flat plate portion (100b). The second patch antennas (20a to 20d) are arranged in at least a column in the column direction.

In order to provide a small size antenna where excellent antenna properties can be stably gained, a frequency adjustment is easy and a simple measurement is possible, according to the present invention, a small size antenna formed of a conductor of at least two adjoining surfaces of a base in rectangular parallelepiped form made of dielectric ceramics is characterized in that: a step is made of a flat portion parallel to one surface of the two adjoining surfaces and an inclining portion located between the one surface and the flat portion, in a corner portion of the two surfaces on which the conductor is formed; the width of the flat portion is 0.08 mm or less; and a border portion between the flat portion and the other surface of the two adjoining surfaces is a curve having a curvature radius R of 0.03 mm to 0.2 mm.

An electronic timepiece with an internal antenna has an antenna that has an elongated magnetic core formed from a magnetic body and a coil wound around the magnetic core, and can receive external wireless information, the magnetic core having a coil winding part to which the coil is wound in the lengthwise center part of the magnetic core, and a pair of lead parts extending from both ends of the coil winding part; a module that houses the antenna and processes the external wireless information; and a magnetic member that is positioned with a predetermined gap between the magnetic member and the lead part at a position that is not superposed on a coil-overlapping area that overlaps the coil winding part of the antenna and is superposed on at least a part of a lead-overlapping area that overlaps the pair of lead parts when the electronic timepiece with internal antenna is viewed in plan view from the timepiece thickness direction of the electronic timepiece with internal antenna.

The device has loop antenna element (18) comprising antenna sections (20,22) that are provided in the same plane. The antenna section (24) is provided in another plane parallel to former plane, and the antenna sections (26,28) are provided for interconnecting antenna sections (20,22,24). The antenna sections form a three-dimensional structure with two-dimensional extension in one of the planes. An independent claim is also included for antenna arrangement.

In a mobile wireless terminal device comprising a first housing that contains a first substrate; an antenna that is disposed in an upper edge portion of the first housing; and a second housing that is disposed in the upper edge portion of the first housing in an openable / closeable manner through a hinge portion, and that contains a second substrate, characterized in that the first substrate and the second substrate are connected by a cable including a GND and a signal line, and current distribution control means having a frequency characteristic with a predetermined impedance is disposed at an arbitrary position on the cable, the cable and a GND on the substrate are connected at an optimum position in each frequency band, and thereby it is possible to obtain excellent antenna characteristics in all frequency bands in use, regardless of a position of a cable connector.

The invention relates to an antenna for communication between M Hz to LG Hz. The antenna is used for solving thin type and high gain problems and performing improvement of widening frequency width of tuning frequency. The antenna athwart provides an electric insulative no-feeding member (16) in a y-axes direction for a slot type bow tie antenna member (19). And the antenna is used for a portable wireless communication machine and a wireless LAN (local area network).

A small antenna comprising: an antenna pattern consisting of: two linear conductor elements; a shorting element that electrically connects the two linear conductor elements and a dielectric in a predetermined shape that contains the antenna pattern therein; where the two linear conductor elements are arranged in parallel with each other, and one of the two linear conductor elements is used as a fed line element, while the other is used as a grounded line element.

A helical antenna capable of operating at a plurality of different resonant frequencies. The helical antenna has a first helical antenna element, a second helical antenna element arranged coaxially with the first helical antenna element and coupled to the first helical antenna element through capacitive coupling, and a metal connection directly connected only to the first helical antenna element to fed the helical antenna. The first helical antenna element is fed through one end thereof to function as a quarter-wave antenna. The second helical antenna element is fed through capacitive coupling to function as a half-wave antenna.

A communication terminal device provided with foldable first case and second case has wide band antenna characteristics in both cases where the cases are open and folded. The folding type communication terminal device is provided with the upper and lower cases (2, 3) which can be folded through a hinge part, and an antenna (5) provided on the lower case (3). The antenna (5) is provided along an edge plane (3A) on an upper part side having contact with the hinge part of the lower case (3), and is provided with a conductor on the upper case (2) having no antenna, and a second printed board (31) which couples with the antenna (5) in high frequency to operate as antenna when the upper and lower cases (2, 3) are opened and transmits / receives electromagnetic waves.

In a portable wireless device (100), a thin coaxial cable (121) connects electrical signals, which are transmitted from first and second circuit members (111, 112) stored in first and second casings (101, 102). The casings are connected to be opened and closed by a third casing (103) which has a hinge section (104). The first and second circuit members (111, 112) are connected to each other by a connecting element (122) with a reactance element (123) arranged in between for switching reactance. The device is provided with first, second and third antennas (131, 132, 133) in the vicinity of the hinge section (104) of the second housing (102). Even if the first casing (101) rotates substantially 90 degrees within the same flat surface, excellent antenna characteristics can be obtained with a discretionary frequency by switching connection impedance of the first and second casings (101, 102), corresponding to frequencies used in terminal states, respectively.Thus, the casings are connected in the ideal manner by switching the connection impedance with a discretionary frequency between the casings, and excellent antenna characteristics are obtained with a discretionary frequency for each discretionary state.

A hemispherical Luneberg dielectric lens including a hemispherical center layer having a hemispherical outer surface, and a plurality of hemispherical dome-shaped layers each having concentric hemispherical inner and outer surfaces, the outer surfaces of the center layer and dome-shaped layers having different diameters and the inner surfaces of said dome-shaped layers having different diameters. The center layer and dome-shaped layers are successively concentrically fitted into one another and integrated into a hemispherical shape. The center layer is a foam molding of ceramic-containing thermoplastic resin expanded beads, while each of said dome-shaped layers is a foam molding of thermoplastic resin expanded beads containing 0 to 80% by weight of a ceramic. The ceramic content per unit volume of the center and dome-shaped layers decreases from the center layer to the outermost dome-shaped layer, and the standard deviation of the apparent density of each of the center and dome-shaped layers is 0.07 g / cm3 or lower