Abstract: A power feeding system 1 includes a floating body 11 having power and a control function and an unmanned aerial vehicle 21 that observes environmental information using the floating body 11 as a base, in which the floating body 11 includes a power feeding device 12 that moves in a space below a top surface of the floating body 11 with reference to one of a plurality of planes arranged in a lattice shape on the floating body 11, roughly specifies a position of the unmanned aerial vehicle 21 in two dimensions based on a reflectance of an emitted radio wave, estimates and calculates a power feeding position of the unmanned aerial vehicle 21 based on a reflectance of an output light beam reflected on a reflector attached to a back surface corresponding to a power receiving position of the unmanned aerial vehicle 21, and feeds the unmanned aerial vehicle 21 with power at the power feeding position.

Abstract: Stub conductors are disposed so as to surround an outer periphery of a patch conductor and be spaced from the patch conductor with a gap positioned between the stub conductors and the patch conductor.

Abstract: A detecting system includes a tag, a radar device that transmits transmission radio waves to the tag and acquires reception radio waves produced by the transmission radio waves being reflected by the tag, and a detecting apparatus. The tag includes a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, and the pattern includes a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus. The detecting apparatus includes a specifying unit that calculates a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and specifies a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity, and a notification unit that notifies the radar of the specified condition.

Abstract: A marine monitoring system includes a control device 1 and at least one flight vehicle 2. The control device 1 includes: a sensor unit 13 that measures at least one of an underwater environment and a sea-surface environment to acquire marine data; a control unit 16 that controls the flight vehicle 2; and a communication unit 15 that receives above-water data measured by the flight vehicle 2. The flight vehicle 2 includes a sensor unit 24 that measures an above-water environment according to control of the control device 1 to acquire the above-water data, and a communication unit 21 that transmits the above-water data to the control device 1.

Abstract: An electromagnetic field band-stop filter includes a plurality of unit structures that have reflection characteristics on an electromagnetic wave of a predetermined frequency. Each of the plurality of unit structures includes: a plurality of electrode parts each of which is disposed along a side of a polygon in a non-contact manner with another electrode part; and a plurality of conductor parts which are provided for the plurality of electrode parts on a one-to-one basis and each of which has at least one bent portion between one end and other end, the one ends of the plurality of conductor parts being connected to the electrode parts on a one-to-one basis and the other ends of the plurality of conductor parts being connected at one point on an inner side of the electrode parts in the individual unit structure.

Abstract: A frequency selective surface having a steep attenuation slope (high sharpness) characteristic is provided without decreasing the line width of a conductive pattern nor the pattern interval thereof. In a frequency selective surface having a structure in which resonators k1xy having identical shapes are periodically arrayed on a dielectric substrate 101, each resonator k1xy includes a cross-shaped conductive pattern formed on the dielectric substrate 101 and a lateral pattern 10 and a longitudinal pattern 20 forming a cross are shaped such that each pattern is extended by a predetermined length in respective directions, each pattern extended by the predetermined length is further extended in both directions orthogonal to each other on the dielectric substrate 101, and leading end parts of the respective further extensions face each other at a predetermined interval d.

Abstract: A patch conductor has a hexagonal shape as a whole in a plan view in which both corners of one side of a rectangle are obliquely cut off, and a connection portion located at a center of the side is connected to a feed line. In this way, an inclined portion inclined with respect to a direction X is formed between the side and a side of the patch conductor, and an inclined portion inclined with respect to the direction X is formed between the side and a side. This makes it possible to significantly improve directivity and gain and obtain a wideband radiation characteristic.

Abstract: A radio frequency antenna measurement system (10) of the present invention includes a receiving antenna (14) that receives a radiated radio wave from an on-chip radio frequency antenna (AUT). The receiving antenna (14) includes a waveguide (14A) in which a connector (14B) for outputting a reception signal to the power sensor (15) is integrally formed at a rear end. Accordingly, in a state where a microscope (MS) necessary for position adjustment of a feed probe (12) is installed, it is possible to construct a reception system that receives the radiated radio wave from the AUT and measures a radiation characteristic on a stage (11), and to measure the radiation characteristic such as a gain and radiation pattern of the AUT with high accuracy.

Abstract: To provide a frequency selective surface of which an operating frequency and a bandwidth thereof can be readily adjusted.

Abstract: Stub conductors are disposed so as to surround an outer periphery of a patch conductor and be spaced from the patch conductor with a gap positioned between the stub conductors and the patch conductor.

Abstract: To accurately estimate frequency characteristics from structural parameters of a frequency selective surface.

Abstract: Arranged on a surface of a substrate are a patch conductor that radiates an electromagnetic field having been fed, a feed line that feeds the patch conductor with the electromagnetic field having been input, two slits parallel to the feed line on both sides of a connection part of the feed line toward an inner side of the patch conductor, and a ring conductor at a space from the patch conductor with an interposition of a gap to surround an outer periphery of the patch conductor. Accordingly, an electric capacitance can be formed between the patch conductor and the ring conductor, and when achieving impedance matching with the feed line, adjustment can be performed using the size of the ring conductor and the gap.

Abstract: To provide a frequency selective surface of which an operating frequency and a bandwidth thereof can be readily adjusted.

Abstract: To accurately estimate frequency characteristics from structural parameters of a frequency selective surface.

Abstract: A frequency selective surface having a steep attenuation slope (high sharpness) characteristic is provided without decreasing the line width of a conductive pattern nor the pattern interval thereof. In a frequency selective surface having a structure in which resonators k1xy having identical shapes are periodically arrayed on a dielectric substrate 101, each resonator k1xy includes a cross-shaped conductive pattern formed on the dielectric substrate 101 and a lateral pattern 10 and a longitudinal pattern 20 forming a cross are shaped such that each pattern is extended by a predetermined length in respective directions, each pattern extended by the predetermined length is further extended in both directions orthogonal to each other on the dielectric substrate 101, and leading end parts of the respective further extensions face each other at a predetermined interval d.

Abstract: An electromagnetic field band-stop filter includes a plurality of unit structures that have reflection characteristics on an electromagnetic wave of a predetermined frequency. Each of the plurality of unit structures includes: a plurality of electrode parts each of which is disposed along a side of a polygon in a non-contact manner with another electrode part; and a plurality of conductor parts which are provided for the plurality of electrode parts on a one-to-one basis and each of which has at least one bent portion between one end and other end, the one ends of the plurality of conductor parts being connected to the electrode parts on a one-to-one basis and the other ends of the plurality of conductor parts being connected at one point on an inner side of the electrode parts in the individual unit structure.