Abstract: In an antenna that has high sensitivity to frequencies of narrow bands and over a wide band and that can be small-sized, and in a wireless module, wireless unit and wireless apparatus using this antenna, the antenna is comprised of a transmission line, and variable capacitance means connected to this transmission line, and the variable capacitance means controls the resonant frequency.

Abstract: A circular polarized antenna has a group of conductor lines that comprise a planar metal conductor, and a feeding point connected to a part of the conductor lines. When a current to be induced on the conductor lines is projected onto two mutually-perpendicular axes to define projections and arguments therebetween, a ratio between absolute values of the projections is 0.7 to 1.3 and an absolute value of a difference between the arguments is 80 to 100 degrees, and a reactance component of an impedance of the feeing point is nearly zero.

Abstract: A small multi-mode antenna in which a single feeding point can be used commonly for multiple frequencies and an RF module using such antenna for use in less-costly and small multimedia wireless apparatus is provided. The antenna is configured such that a single feeding point 4 which is common for multiple frequencies is set up at one end of a radiating conductor 1, a first one-port resonant circuit 2 is connected to the one end thereof, and a second one-port resonant circuit 3 is connected to the other end of the radiating conductor 1. With a conductance component of admittance in view from the feeding point 4 toward free space equaling the characteristic admittance in the RF circuit, a susceptance component of the admittance is canceled out by the resonant circuit 2 connected to the feeding point 4 for multiple frequencies.

Abstract: A group of metallic conductors 1 are prepared and a power feed point 2 is formed at one of the metallic conductors to provide a circular polarized wave antenna. The circular polarized wave antenna is designed such that an absolute value of a sum of projections of an electric current induced on the metallic conductors in x-axis and an absolute value of a sum of projection of the electric current in y-axis that is spatially orthogonal to the x-axis are approximately equal to each other, and an absolute value of a difference between an argument of the sum of the projections in the x-axis and an argument of the sum of the projection in the y-axis is approximately 90°.

Abstract: A wireless monitoring system using a base station and a child station, includes the base station including a base-station transmitting and a base-station receiving antenna, and the child station including a child-station receiving antenna, a nonlinear, a smoothing circuit, a first high-frequency band-pass filter, an intermediate-frequency band-pass filter, a demodulator, a baseband, a modulator, and a child-station transmitting antenna. The base-station transmitting antenna and the child-station receiving antenna include circularly-polarized antennas which have a same rotating direction, and the child-station transmitting antenna and the base-station receiving antenna include circularly-polarized antennas which have a polarization characteristic rotating in a direction opposite to the base-station transmitting antenna and the child-station receiving antenna.

Abstract: A tunable receiving apparatus, includes a variable capacitative member, a tunable antenna having a resonant frequency controlled by the variable capacitative member, a tuner outputting a control signal related to a receiving-sensitivity of the tunable antenna, and a control circuit processing the control signal and controlling the variable capacitative member. The variable capacitative member is controlled automatically by the control circuit to optimize the receiving-sensitivity.

Abstract: A small antenna operating in multiple modes including three or more modes. There are provided an antenna that includes a ground conductor having a ground potential, a single feeding point whose one end is formed by a part of the ground conductor, and a plurality of transmission lines to which RF power supplied to the feeding point is input, the transmission lines each radiating electromagnetic waves of three frequencies of three modes into space. These transmission lines comprises a transmission line 41 that is connected to the feeding point at one end and to a branching point at the other end, a transmission line connected between branching points, and transmission lines connected to the branching points. The lengths of the respective transmission lines are set so that impedance matching is performed at the feeding point with respect to a plurality of frequencies. The antenna is formed from an integrated metal plate.

Abstract: An antenna module formed with an integrated multilayer substrate having: an antenna with a transmission line; a tuned circuit with a variable capacitance means; a low noise amplifier; and a wave-shaping circuit. The variable capacitance means in the tuned circuit controls a resonance frequency of the antenna by an external control signal being wave-shaped by the wave-shaping circuit, and the antenna outputs a high-frequency output tuned to the controlled resonance frequency to the low noise amplifier directly and then the low noise amplifier outputs the amplified high-frequency output to outside.

Abstract: A system and method are provided for detecting biological and chemical material. To measure biological materials such as genes easily at low costs, the device for implementing a small-sized, high sensitive, economical measurement apparatus is provided. Probes appropriate for target biological materials are fixed on a chip, on which a sensor, identification number, and radio communication function are implemented, the captured targets are detected by the sensors, and the result of sensing are transferred to an external control unit by the radio communication function. The small-sized, high sensitivity measurement apparatus for detecting biological and chemical materials such as genes and measuring physical and chemical amounts such as temperature, pressure, pH, and the like can be implemented.

Abstract: In an antenna that has high sensitivity to frequencies of narrow bands and over a wide band and that can be small-sized, and in a wireless module, wireless unit and wireless apparatus using this antenna, the antenna is comprised of a transmission line, and variable capacitance means connected to this transmission line, and the variable capacitance means controls the resonant frequency.

Abstract: A distributed phase type circular polarized wave antenna provided with a plane, a power feed point 4 formed on the plane; and narrow conductor groups 1, 2 composed of narrow conductors 101 having a substantially one-dimensional current distribution, the narrow conductor groups being distributed in two dimension on the plane, and sums of projections of complex vectors of current distributions induced on the narrow conductors in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that amplitudes are approximately equal to each other and a phase difference is approximately 90°.

Abstract: A small multi-mode antenna in which a single feeding point can be used commonly for multiple frequencies and an RF module using such antenna for use in less-costly and small multimedia wireless apparatus is provided. The antenna is configured such that a single feeding point 4 which is common for multiple frequencies is set up at one end of a radiating conductor 1, a first one-port resonant circuit 2 is connected to the one end thereof, and a second one-port resonant circuit 3 is connected to the other end of the radiating conductor 1. With a conductance component of admittance in view from the feeding point 4 toward free space equaling the characteristic admittance in the RF circuit, a susceptance component of the admittance is canceled out by the resonant circuit 2 connected to the feeding point 4 for multiple frequencies.

Abstract: A distributed phase type circular polarized receiving module provided with a plane, a power feed point 4 formed on the plane, and a group of narrow conductors 101 having a substantially one-dimensional current distribution, and the narrow conductors being distributed in two dimension on the plane, a transistor 9 connected to the power feed point 4, sums of projections of complex vectors of current distributions induced on the narrow conductors 101 in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that amplitudes are approximately equal to each other and a phase difference is approximately 90°.

Abstract: A distributed phase type circular polarized wave antenna is composed of a group of narrow conductor lines 2a, 2b, 2c and 2d, and the group of the narrow conductor lines 2a, 2b, 2c and 2d are laid out in a two-dimensional plane. Complex vectorial sums of respective projections of current induced in each point of the narrow conductor lines 2a, 2b, 2c and 2d in two directions orthogonal to each other in the two-dimensional plane are determined, such that amplitudes of the complex vectorial sums are equal to each other in the two directions and a phase difference between the complex vectorial sums in the two directions is 90°.

Abstract: A leakage loss line type circularly-polarized wave antenna is provided with 3 or more conductor lines having losses caused by electromagnetic radiation and being connected to a single power feed point. The projection of the conductor lines onto a plane perpendicular to a straight line that connects the power feed point and one point in the distance is in a positional relationship so that the projection of at least one conductor line is perpendicular to the projection of the remaining conductor lines.

Abstract: A circular polarized antenna has a group of conductor lines that comprise a planar metal conductor, and a feeding point connected to a part of the conductor lines. When a current to be induced on the conductor lines is projected onto two mutually-perpendicular axes to define projections and arguments therebetween, a ratio between absolute values of the projections is 0.7 to 1.3 and an absolute value of a difference between the arguments is 80 to 100 degrees, and a reactance component of an impedance of the feeing point is nearly zero.

Abstract: A small size thin type antenna using a thin type structure having a wavelength compaction effect without using a bulk conductive material and a high frequency module using the same are disclosed. The small size thin type antenna comprises an open stub 3 including at least one transmission line 13, 16, a connecting line 5 including at least one transmission line 15, and a short stub 4 including a transmission line 14. A characteristic impedance Zo of the open stub 3 is determined to be lower than a characteristic impedance Zb of the connecting line 5 and a characteristic impedance Zs of the short stub 4.

Abstract: A pattern extraction computational algorithm has: using a bus, a CPU, a storage area, an input and an output of a computer to conduct the pattern extraction computational algorithm; storing a size of a limited area, a size of a minute area, a starting point from which the minute area is arranged, a matrix with information on an attribute of an element, and an matrix with information on the minute area in the storage area; and patterning a structure based on a topology composed of a plurality of elements with attributes by using a rule in the size of the limited area to extract all patterns to accord to the topology.

Abstract: A science and engineering simulator using numerical analysis of simultaneous linear equations is provided with a first storage means for storing a coefficient matrix Z of rank-N simultaneous linear equations; a second storage means for storing a rank-N constant vector V; a third storage means for storing a rank-n (n<N) updated coefficient matrix z; a fourth storage means for storing a rank-n updated constant vector v; a first temporary storage area for storing a rank-n unknown vector I; a second temporary storage area for storing a rank-n candidate matrix C; a third temporary storage area for storing a rank-n degenerate vector E; and an arithmetic unit for executing an algorithm for searching I(ept) determined to converge to a particular value opt with predetermined tolerance deviation tol, where the I(ept) is a coefficient of an unknown vector I corresponding to a particular column ept of the coefficient matrix Z.

Abstract: The invention provides a small multimode antenna capable of commonly using a single feeding point at a plurality of frequencies. The antenna includes a radiating conductor 1 disposed above a ground conductor 6 and distributed-constant circuits 2 and 3 coupled to the radiating conductor. Each of the distributed-constant circuits is constructed by a transmission line and has a branch. One end of the radiating conductor and one end of the distributed-constant circuit 2 are connected to each other to be a connection point and, further, the other end of the radiating conductor and one end of the distributed-constant circuit 3 are connected to each other. The connection point is a single feeding point 9 using the ground conductor as an earth. The distributed-constant circuits 2 and 3 are designed as an equivalent circuit in which different stubs are connected in parallel with a transmission line, and impedance matching at a plurality of frequencies is realized at the feeding point.