Anritsu Corporation

Tomohiko Maruo

Takeshi Kobayashi

Aya Yamamoto

Hiroyuki Baba

Yasuhiko Nago

Hiroshi Hasegawa

Tomonori Morita

Hiroshi Watanabe

Masafumi Setsu

Marco Angelo Del Pilar Samonte

Joji Koto

Seiichi Ishizaki

There is provided a test apparatus that measures transmission characteristics or reception characteristics of a DUT having an antenna under test, and includes an anechoic box, a posture changeable mechanism, a first test antennaand a second test antenna, for measuring the transmission characteristics or the reception characteristics of the DUT, a reflector that reflects a radio signal radiated by the first test antenna and converts the radio signal into a plane wave radio signal, and a movable antenna mechanismthat moves a position of the second test antenna such that the radio signal is transmitted to or received from the DUT installed in a far field at a plurality of angles of arrival, with reference to a radio-wave arrival direction from the first test antenna.

Test apparatus and test method

The temperature test apparatus includes a test antenna for measuring transmission and reception characteristics of a DUT, an anechoic box formed by a metal housing having an internal space, a heat insulating housing, a temperature control device that controls the temperature of a spatial region, and a measurement device that measures the transmission and reception characteristics of the DUT. The temperature control device and the heat insulating housing are connected to each other by a pipethrough which a gas for controlling the temperature of the spatial region passes and that goes through the metal housing. A portionA of the pipe from the metal housing to a predetermined position of the internal space is made of metal. A metal net portionthat blocks a pipelineAe of a portion of the pipeis provided.

Temperature test apparatus and temperature test method

A test devicethat measures the transmission properties or reception properties of the test objecthaving the test antenna, and includes an anechoic box, a plurality of test antennasthat transmit or receive radio signals to or from the antenna, under tests, a posture changeable mechanismthat changes the posture of the test object arranged in the quiet zone QZ, a measurement devicethat measures the transmission properties or reception properties of the test object with respect to the test object whose posture is changed by the posture changeable mechanism using the test antenna, and the reflectorthat radio signal is reflected. The plurality of test antennas include a reflection type test antennaand the plurality of direct-type test antennas

Test device and a test method

A temperature test apparatusincludes a test antennaconfigured to transmit or receive a radio signal to or from the antennasin order to measure reception characteristics or transmission characteristics of the DUT, a heat-insulating housingmade of heat-insulating material surrounding a space regionincluding a quiet zone QZ, and a measuring deviceconfigured to measure the transmission characteristics or the reception characteristics of the DUT. The heat-insulating housinghas a flat plate shaped partin a region through which radio waves of a radio signal transmitted from the test antennapasses before entering the quiet zone QZ. The flat plate shaped partis perpendicular to the traveling direction of the radio waves of the radio signal entering the quiet zone QZ.

A test apparatus includes a test antenna that is provided in an OTA chamberand transmits or receives a radio signal to or from an antennaof a DUT, and a measurement device that measures transmission characteristics or reception characteristics of the DUTdisposed in a quiet zone QZ, by using the test antenna. The test antenna includes a reflector reflection type test antennathat transmits or receives a radio signal to or from the antennaof the DUT via a reflector, and mirror reflection type test antennae, andthat transmits or receives a radio signal to or from the antennaof the DUT via mirrorsto

An antenna apparatusincludes: an anechoic boxhaving the internal spacethat is not influenced by the surrounding radio wave environment; a plurality of antennasthat use radio signals in a plurality of divided frequency bands set in advance; a reflectorthat is housed in the internal space and has a predetermined paraboloid of revolution, radio signals transmitted or received by an antennaof a DUTbeing reflected through the paraboloid of revolution; and antenna arrangement meansfor sequentially arranging the plurality of receiving antennasat a focal position F, which is determined from the paraboloid of revolution, according to the divided frequency bands.

Antenna apparatus and measurement method

An antenna apparatus is configured to include: a DUT scan mechanism that executes total spherical scanning on a DUT having an antenna in an internal space of an OTA chamber around a reference point; a plurality of antennas disposed at a distance within a near field measurement range from the reference point; and signal analysis devices that respectively perform a near field measurement process related to total radiated power (TRP) based on reception signals of the antennas which receive radio signals in a spurious frequency bandwidth radiated from the antenna transmitting and receiving radio signals in a specified frequency bandwidth, during execution of the total spherical scanning.

An measurement apparatus (antenna apparatus)includes: an OTA chamberhaving an internal spacethat is not influenced by the surrounding radio wave environment; a reflectorthat is housed in the internal space, radio signals transmitted or received by an antennaof a DUTbeing reflected through a paraboloid of revolution; a plurality of test antennasthat use radio signals in a plurality of measurement target frequency bands for measuring the transmission and reception characteristics of the DUT; and automatic antenna arrangement meansfor sequentially arranging each of the test antennasat a focal position F, which is determined from the paraboloid of revolution, according to the measurement target frequency bands.

An electromagnetic wave shield boxaccommodates a DUThaving an antennaand a coupling antennathat is spatially coupled to the antenna, and includes a coupling antenna holding modulethat arranges a plurality of the coupling antennasannually so that an antenna surface is directed to a center of a ring, and holds the coupling antennas. The coupling antenna holding moduleholds each coupling antennain a posture in which the coupling antennais inclined at, for example, 32 degrees with respect to a horizontal surface so that the respective coupling antennasare able to radiate radio waves toward the same radiation point in upper positions, and is rotated by about 5 degrees around a center axis Cin a direction orthogonal to a circumferential direction of the ring of the coupling antenna

Electromagnetic wave shield box

[Problem] To provide a band stop filter unit, a mobile communication terminal test system, and a mobile communication terminal test method that are flexibly adaptable to the addition/change of a specification in a frequency band for mobile communication. [Means for Resolution] There are provided a first variable filter () and a second variable filter () which are connected to each other in series, respectively have YIG elements to vary tuning frequencies (fand f), and attenuate the desired signal within predetermined bandwidths (&#x394;BWand &#x394;BW) having centers of the tuning frequencies. The tuning frequency (f) and the tuning frequency (f) are controlled to be the same as each other or around each other when the desired signal is located at a low frequency band side. The tuning frequency (f) and the tuning frequency (f) are controlled to include the desired signal in a connected bandwidth and to make the connected bandwidth wider than any of the predetermined bandwidth (&#x394;BW) and the predetermined bandwidth (&#x394;BW) when the desired signal is located at a high frequency band side.

Growing community of inventors

Kanagawa, Japan

Tomohiko Maruo