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.