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JP2517849B2 |
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JP2510880B2 |
A flat wave absorber having a conductive plate (23), a dielectric plate (22) on the conductive plate (23), and, a ferrite plate (21) on said dielectric plate, provides a wide operational frequency range from 30 MHz to 1 GHz with excellen...
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JP2509369B2 |
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JP2500160B2 |
PURPOSE: To obtain a wide-band input impedance characteristic by dividing the extent of the height of a radio wave absorber having a structure in which gap sections and ferrite sections are regularly repeated like a fin or lattice type r...
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JPH08116197A |
PURPOSE: To provide a radio-wave absorptive structure of a transparent plate, in which radio-wave interference caused by a public radio wave reflected by a building and scattered or diffracted can be prevented. CONSTITUTION: A transparen...
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JPH08111594A |
PURPOSE: To restrain incident electromagnetic waves from being reflected throughout a wide bandwidth and a wide range of incident angle. CONSTITUTION: An electromagnetic wave absorbing device is composed of a porous electric absorbing la...
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JPH0834354B2 |
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JPH0884015A |
PURPOSE: To make effective beam pointing possible for a portable antenna or an antenna for moving body in accordance with easy operation procedures with a simple constitution by changing the radiation directivity so as to gradually stepw...
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JPH0828591B2 |
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JPH0870212A |
PURPOSE: To fit a radio wave absorbing mat with a simple work, to attain sufficient mount strength and to prevent deformation in the radio wave absorbing mat, a change in the radio wave absorbing characteristic and unnecessary radiation....
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JPH0821813B2 |
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JPH0840655A |
PURPOSE: To obtain a high shielding effect even a shielding structure having an opening part by providing a U-shaped cover made of metal for shielding antennas and housing the antennas installed in a tower and car in a recessed part insi...
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JPH08500984A |
The disclosed device comprises a container (1) intended to be placed in the vicinity of the source of said radiation and containing a medium (6) which has been subjected to prior irradiation and a metal salt or a combination of metal sal...
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JPH0832278A |
PURPOSE: To obtain a head shield with which even a person, other than an expert, can use a portable radio telephone in safety by setting the head shield between the head part and the transmission antenna of the portable radio telephone t...
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JPH0826808A |
PURPOSE: To obtain a radio wave absorber having excellent radio wave absorbing characteristics by using carbon fiber. CONSTITUTION: This is a radio wave absorber consisting of concrete containing carbon fiber, wherein a length Lf (mm) an...
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JPH084147A |
PURPOSE: To provide a relatively spacious concrete panel suitable for settlement of the electric wave jamming in a steel pipe column or a reinforced concrete structure and a simple structural radio absorptive wall structure of a steel pi...
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JPH084146A |
PURPOSE: To readily obtain a thin and spacious concrete panel, by knitting fine threads of chemical fibers with a large tensile strength so as to make a braid and sticking ferrite powder on the peripheral face and solidifying a reinforci...
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JPH07120574B2 |
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JPH07331463A |
PURPOSE: To measure propagation of microwaves with less influence of disturbance by using a material coated with a material which generates heat by absorbing the microwaves for a material surface which is irreversibly changed by heating....
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JPH07307594A |
PURPOSE: To acquire conduction readily and surely by acquiring a curing matter whose essential elements are synthetic resin and conductive powder and conductive powder is separated and precipitated from a synthetic 9& resin layer during ...
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JPH07302994A |
PURPOSE: To obtain the manufacturing method of a porous ferrite sintered body which is applied mainly to a building or the like and which is provided with a radio-wave absorption capability. CONSTITUTION: When a ferrite sintered body is ...
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JPH07105610B2 |
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JPH07105612B2 |
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JPH07105611B2 |
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JPH07297625A |
PURPOSE: To provide a microstrip antenna which can increase its gain at low cost and also can reduce its half power angle. CONSTITUTION: A rectangular radiation conductor plate 1 is laminated on a conductor plate 4 via a dielectric plate...
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JPH07101786B2 |
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JPH07101785B2 |
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JPH07254817A |
PURPOSE: To easily confirm a transmission reception wave without any revising of a satellite communication earth station and without disturbing other communication. CONSTITUTION: When a transmission wave is sent from an earth station 1, ...
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JPH0741206Y2 |
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JPH0786521B2 |
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JPH07241837A |
PURPOSE: To provide a concrete structure permeable to radio wave, which eliminates the trouble of electromagnetic reflection easily and economically. CONSTITUTION: Reinforcements 2 and reinforcing materials 3 are embedded in a concrete 4...
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JPH0783195B2 |
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JPH07235827A |
PURPOSE: To mount/dismount a primary radiator to/from a rear side of an antenna reflecting mirror by using a straight line close to a center line of a radiation section as a rotary axis and turning a metallic plate around the axis. CONST...
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JPH07212075A |
PURPOSE: To enable a unit body not only to rationally absorb/shield sonic waves but also to absorb electromagnetic waves by a method wherein the body is formed of structural material which contains balls that are conductive containing me...
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JPH07507429A |
A method for making a material with an artificial dielectric constant is carried out by choosing the desired dielectric constant for a particular electromagnetic field, selecting a substantially non-electrically conductive sheet material...
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JPH07193387A |
PURPOSE: To acquire a light wave absorption building material of good workability having a wave shield function replacing a metallic plate by forming a plating electrode film wherein a copper film by electroless plating is laminated on a...
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JPH0752207B2 |
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JPH07142922A |
PURPOSE: To provide an antenna horn cap which forcedly interrupts the transmission/reception of a radio wave from an antenna horn used for a satellite communication system and which can easily be installed at the tip of the antenna horn ...
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JPH0750837B2 |
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JPH0744361B2 |
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JPH0725609U |
[Purpose] Provided is an antenna for receiving satellite radio waves of a mobile body, which prevents the incident of transmitted radio waves from a positioning satellite reflected by an obstacle or the like and prevents deterioration of...
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JPH07111411A |
PURPOSE: To reduce the effect of a radio wave on a human body by incorporating an antenna in a main body and providing a means attenuating a transmission output from the antenna in a direction of a head of the human body. CONSTITUTION: E...
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JPH0796962A |
PURPOSE: To prevent generation of electric potential with respect to electromagnetic interference(EMI) by adhering a conductive gasket to an upper edge of a conductive container, and covering the gasket by a conductive lid to form an ele...
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JPH07502940A |
Weather-resistant electromagnetic radiation shielding materials and structures for electromagnetic interference attenuation for electronic equipment situated in unshielded outdoor housings are described.
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JPH0774493A |
PURPOSE: To provide a method for reducing radio-wave reflection at low cost with excellent ghost preventing effect without causing restriction on an outer design nor increasing the weight of an outer-wall panel. CONSTITUTION: A reinforci...
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JPH0774495A |
PURPOSE: To provide a radio-wave absorptive panel with excellent wide-band attenuation in reflection, by putting a composite material with magnetic powder on an outer face of an exterior PC panel, where tube-shaped ferrite bodies are ins...
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JPH0724362B2 |
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JPH0750497A |
PURPOSE: To enable coping with even a complex surface structure and lightweighting by a cylindrical ferrite core into a part of a structure reinforce ment bar of a facing PC panel. CONSTITUTION: A cylindrical ferrite core 2 25mm long hav...
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JPH0710038B2 |
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JPH0730325A |
PURPOSE: To easily alloy an omnidirectional antenna to have directively, and to interrupt a useless radio wave by providing an opening in the fixed direction of a cylindrical main body constituted of conductive materials around the omnid...
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