摘要:
The size of an antenna coil is reduced, and it is possible to prevent a lowering of the reception sensitivity due to a difference of the arrangement position of the antenna coil. On a winding frame of a ferrite core, a first coil and a second coil are wound in such a manner that their winding axes orthogonally intersect each other. A third coil is wound around an outer circumference of the first coil and the second coil in such a manner that the third coil's winding axis orthogonally intersects the winding axes of the first coil and the second coil.
摘要:
A ferrite-loaded broadband loop antenna having nearly comparable transmit/receive characteristics is disclosed. The antenna contains a low loss ferrite core having a width-to-height ratio of approximately 24 and a depth-to-height ratio of approximately 6, and an antenna feed plate assembly centered about the long axis of the ferrite core, having a width-to-height ratio of approximately 6 and a width-to-depth ratio of approximately 1, and a balanced feed located at the center of the antenna feed plate assembly, positioned on the radiating side of the antenna, and a low loss center element in the ferrite core, the center element having at least one of a loss tangent and a permeability that is lower than the ferrite core, and a grounding surface coupled to the antenna feed plates.
摘要:
A portable electronic device includes a circuit board and an antenna coil installed on the circuit board. The antenna coil includes a magnetic core and a coil wound at either side of an unwound portion. The winding direction of the coil is changed at either side of the unwound portion. When the length of the magnetic core is defined as X and the distance between two intersecting points at which a virtual line formed by projecting the central line of the magnetic core onto the circuit board intersects the outer periphery of the circuit board is defined as Y, the antenna coil satisfies Y≧X≧0.8Y.
摘要:
An antenna and associated magnetic preamplifier for use with UHF and Microwave wireless telecommunications devices operating at frequencies of greater than 0.3 gigahertz. The antenna may include a plurality of concentric loops about a core. The antenna may be made of a conductor wound helically about an air core with a circumference and a number of loops, and the spacing of the loops chosen based on the desired frequency of communication. The antenna may include a plurality of loops of conductor about a core with a ferrite rod positioned within the core. The antenna may be omnidirectional and provide a high gain at the desired frequency of communication. The magnetic preamplifiers may be based on either resonant or ferrite material-enhanced amplification. Resonant and ferrite enhancements may also be used in combination.
摘要:
To achieve sensitivity not deviating in any of XYZ directions. A three-axis antenna with a cross-shaped core (2) having a pair of X-axis arms (22a, 22b) projecting in the X-axis direction in an orthogonal coordinate system and a pair of Y-axis arms (23a, 23b) projecting in the Y-axis direction orthogonal to the X-axis direction, and having Z-axis winding wire (26) provided in a substantially rectangular frame shape, outside the head sections of the X-axis arms (22a, 22b) and the head sections of the Y-axis arms (23a, 23b). The Z-axis winding wire is housed in a case having the bottom so as to cover the entire parts of head surfaces of the X-axis arms (22a, 22b) and of head surfaces of the Y-axis arms (23a, 23b).
摘要:
An antenna core produced by shaping a soft magnetic metal powder with the use of a resin as a binder, wherein the soft magnetic metal powder is an amorphous soft magnetic metal powder or a nanocrystal-containing amorphous soft magnetic metal powder, of the general formula (1): (Fe1-x-yCoxNiy)100-a-b-cSiaBbMc (1), and wherein the resin as a binder is a thermosetting resin. In the formula, M is at least one element selected from the group consisting of Nb, Mo, Zr, W, Ta, Hf, Ti, V, Cr, Mn, Y, Pd, Ru, Ga, Ge, C, P, Al, Cu, Au, Ag, Sn and Sb. Each of x and y is an atomic ratio and each of a, b and c an atomic %, satisfying the relationships: 0≦x≦1.0, 0≦y≦0.5, 0≦x+y≦1.0, 0≦a≦24, 1≦b≦30, 0≦c≦30 and 2≦a+b≦30.
摘要翻译:一种天线芯,其通过使用树脂作为粘合剂使软磁性金属粉末成形而制成,其中所述软磁性金属粉末是非晶态软磁性金属粉末或含纳米晶体的非晶态软磁性金属粉末,其通式为( 1):(Fe1-x-yCoxNiy)100-ab-cSiaBbMc(1),其中作为粘合剂的树脂是热固性树脂。 在该式中,M是选自Nb,Mo,Zr,W,Ta,Hf,Ti,V,Cr,Mn,Y,Pd,Ru,Ga,Ge,C,P中的至少一种元素, Al,Cu,Au,Ag,Sn和Sb。 x和y中的每一个是原子比,a,b和c分别为原子%,满足以下关系:0 <= x <= 1.0,0 <= y <= 0.5,0 <= x + y <= 1.0 ,0 <= a <= 24,1 <= b <= 30,0 <= c <= 30和2 <= a + b <= 30。
摘要:
A portable remote controller for a tire status detector, includes a portable casing, a transmission circuit disposed in the casing, a low-pass filter disposed at an output side of the transmission circuit for permitting a signal with a frequency of not more than the first frequency to pass through the low-pass filter, a receiving circuit disposed in the casing, a high-pass filter disposed at an input side of the receiving circuit for permitting a signal with a frequency of not less than the second frequency to pass through the high-pass filter, a ferrite bar antenna housed in the casing and having a ferrite bar wound with an antenna coil, the antenna coil having two terminals, one of which being connected to the ground and the other being connected in common to the low-pass and high-pass filers and a duplexer composed of the low-pass and high-pass filters. The ferrite bar antenna is used both for transmission of the long wave signals and for receipt of the ultra high frequency signals.
摘要:
A fob for a remote keyless entry system includes a printed circuit board (PCB) located within a housing. The PCB includes a surface on which circuitry is printed and components are mounted. A coil is mounted to the surface and provides an antenna for the fob. The coil includes a frame spaced apart from the PCB to provide room for other components on the PCB. Coil mounts extend from the frame and are received by the PCB at coil mount locations. The coil mounts contact the surface of the PCB to form an electrical connection.
摘要:
A magnetic sensor-type antenna comprising a magnetic core and a coil wound around the magnetic core for receiving electromagnetic waves, which is disposed in a housing such that the end portion of the magnetic core is bent away from the housing or a metal portion of the housing, and a timepiece, a keyless entry system and an RFID system each comprising such an antenna.
摘要:
An antenna coil includes: a core (3) formed by shaping a magnetic material into a bar-like configuration; a bobbin (1) having a through-hole (12) into which the core (3) is to be inserted; a connection section (15) fixed to the bobbin (1) so as to extend in a length direction of the core (3) from the bobbin (1), with the core (3) inserted into the through-hole (12); a winding (14) which is wound around the bobbin (1) and whose ends are connected to the connection section (15); and a connector terminal (25) which is provided at a certain position in the length direction of the core (3), which fixes the connection section (15) in position, and which determines the position of the winding (14) in the length direction of the core (3).