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JP3319147B2 |
PURPOSE: To provide a thin wave absorber which does not have polarization dependency, is easy to design and manufacture and enables effective reflection restraint to oblique incident wave. CONSTITUTION: A wave absorber is provided with a...
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JP3318490B2 |
To ensure superior radio wave absorbing characteristics by imparting a compsn. consisting of a specified mol% of Na2O and the balance alumina with inevitable impurities. A mixture of alumina powder of ≥99% purity with 3-10mol% Na2O or ...
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JP2002237719A |
To provide a wave absorber capable of suppressing irregular reflection of radio waves in the communication area of a transmission and reception antenna and the leakage of radio waves from the communication area as much as possible in an ...
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JP2002232229A |
To provide a radio wave absorption structure capable of performing radio wave leakage prevention, interference prevention, etc., by reliably absorbing an spurious radio wave in a communication area.A plurality of almost pyramidal recesse...
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JP2002230507A |
To provide a system using a non-contact radio data carrier capable of sending and receiving all electric waves in an effective electric wave zone.This data carrier system is provided with the non-contact radio data carrier 3 capable of s...
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JP2002228697A |
To realize a compact range having a characteristic providing a main polarization with a uniform amplitude distribution and uniform phase distribution as polarization characteristic of beam in a test zone and having almost no cross polari...
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JP2002216179A |
To provide radio wave absorption structure which can sufficiently absorb a radio wave radiated from a radio source for a wide range and an automatic rate collecting system by using it.In radio wave absorbing structure, a plurality of she...
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JP2002198686A |
To provide a sheet for electronic components whose electromagnetic wave shield and heat radiation performance are both excellent and a method for manufacturing this sheet.This sheet 1 for electronic components is constituted of an electr...
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JP2002198682A |
To provide a wave absorber whose film thickness is thin, whose weight is light, and whose wave absorptivity is excellent.This wave absorber is constituted by successively forming a metallic wave reflector layer (A), a ferrite containing ...
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JP2002198850A |
To provide a portable telephone set which can more effectively decrease an electromagnetic energy absorption caused by a human body at the time of using the portable telephone set.A portable telephone set 101 comprises an antenna 1; a mo...
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JP3297115B2 |
PURPOSE: To provide an electromagnetic shield double window where the electromagnetic shield performance in a high frequency band or a short wavelength band is improved by making the electromagnetic shield window a double window. CONSTIT...
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JP2002185179A |
To provide an electric wave absorbing tool mounted on a structural facility for absorbing an electric wave effectively.In the electric wave absorbing tool 1 for absorbing an electric wave, a laminated body including a resin plate 10 havi...
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JP2002176285A |
To provide excellent radio wave absorbing characteristics over a wide frequency band while excellent in environment resistance as well.There are provided with a non-flat surface 121, a first layer of a lossy dielectrics and provided on t...
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JP3288999B2 |
To prevent an automatic toll collection system from malfunctioning by suppressing unwanted radio waves, generated in a two-way communication between an on-road antenna and an on-vehicle antenna. A toll gate 1 is provided with a gate 2, a...
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JP2002158484A |
To provide a radio wave absorber which has a high absorption function to an electromagnetic wave of high frequency and is made smaller in thickness.This radio wave absorber is comprised of more than one magnetic layer which contains a ma...
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JP2002158483A |
To provide a radio wave absorber in which suitable material and structure can be appropriately selected and which is superior in absorption of electromagnetic wave of high frequency and is made smaller in thickness.This radio wave absorb...
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JP2002158481A |
To provide a wave absorber which absorbs radio waves in unwanted bands and has a bandpass performance to allow such radio waves in specific narrow frequencies, for example, 800 MHz to 1 GHz, or 1.8 GHz to 3 GHz, to be passed through that...
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JP3285990B2 |
PURPOSE: To obtain an electromagnetic wave shielding resin composition having excellent electromagnetic wave shielding effects and excellent in molding fluidity and surface appearance. CONSTITUTION: This magnetic wave shielding resin com...
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JP2002152351A |
To control the directivity of a radio device to the set directivity.A radio-wave nontransmission part 22 is installed at an enclosure 2. The part 22 is formed of a material which absorbs radio waves radiated from a built-in antenna 10. W...
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JP3278373B2 |
To provide a radio wave absorber usable favorably for facing building, etc., thin in matching thickness, having an excellent anti-chipping property in addition, free from damages at the time of working and excution of works, and having a...
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JP3278871B2 |
PURPOSE: To index a communication range independently of a frequency of a radio wave in the antenna system employed for a mobile body identification device. CONSTITUTION: The antenna system consists of an array antenna 1 formed by arrang...
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JP3275513B2 |
PURPOSE: To reduce an influence to be exerted upon a human body by incorporating a surface mounted antenna for transmission inside the mobile object communication equipment and interposing the ground pattern of a circuit board between th...
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JP2002107398A |
To obtain a 'silent' electromagnetic wave environment which is equivalent to an open site, using a radio wave anechoic chamber.A radio wave absorbing body 10d is placed on a floor face 10c, located between a transmission antenna 12 and a...
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JP2002094311A |
To provide a mobile wireless terminal, the conductive flat plate of which is made small that is used to reduce the quantity of electromagnetic waves absorbed by a human body among the electromagnetic generated waves.The mobile wireless t...
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JP2002094283A |
To provide coiled carbon fiber that can efficiently absorb an electromagnetic wave in a high-frequency band, the manufacturing method of the coiled carbon fiber, and an electromagnetic absorption material.This coiled carbon fiber is made...
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JP2002076678A |
To provide a method for absorbing electromagnetic wave by which the constitution of an electromagnetic wave absorber can be simplified and weight of the absorber can be reduced, and then, the absorber can be enabled to absorb electromagn...
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JP2002076672A |
To widen the electromagnetic wave absorbing band of an electromagnetic wave absorber and, at the same time, to reduce the thickness of the absorber.A reflecting film 18 is formed on an insulating substrate 14 of insulating substrates 12A...
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JP2002076682A |
To reduce the thickness of an electromagnetic wave absorbing body.A split conductor layer 22 which comprises a plurality of conductive films arrayed with a space in two directions across the direction where a resistance film 16 and a ref...
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JP2002077350A |
To provide safety by making water of high absorption capacity drawn in electromagnetic waves generated by portable telephone, thereby relieving the influence on the human body.This is a portable telephone electromagnetic wave reliving de...
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JP2002076671A |
To provide a method for absorbing electromagnetic wave by which an electromagnetic wave to be absorbed is absorbed by superposing an opposite-phase electromagnetic wave upon the electromagnetic wave and to provide a wave absorber which c...
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JP2002076675A |
To provide a paper-like wave absorber in which particles having wave absorbing abilities are fixed on a substrate and which is excellent in workability and operability and to provide a method of manufacturing the absorber.In the wave abs...
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JP2002076679A |
To widen the electronic wave absorbing band of an electromagnetic wave absorber and to reduce the thickness of the absorber.An electronic absorbing panel 10 is provided with insulating substrates 12, 13, and 14 which are arranged in para...
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JP3265646B2 |
PURPOSE: To obtain an anechoic chamber having excellent anechoic chamber performance, securing a wide internal space and formed inexpensively by forming a floor of a waveguide section as an earth equivalent floor and forming at least par...
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JP3265651B2 |
PURPOSE: To obtain an electromagnetic wave shielding (vulcanized) rubber composition with high strength comprised of an ethylene-α olefin copolymer, an electroconductive metal and a zinc acrylate compound and having excellent characteri...
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JP3265647B2 |
PURPOSE: To obtain the anechoic chamber having excellent anechoic chamber performance in which no disturbance of an electromagnetic field is caused especially even at a high frequency band by connecting a transmission section and a recep...
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JP3265648B2 |
PURPOSE: To provide the anechoic chamber having more excellent electric field uniformity in which the reflection at a coupling part between a ferrite radio wave absorbing body provided to a waveguide section and a radio wave absorbing bo...
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JP2002068209A |
To provide a plastic bag for a cellular phone, which can effectively cut off a microwave to be generated from the cellular phone at the proximate distance to user's ear and brain and which causes no trouble in speaking over the cellular ...
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JP2002064327A |
To provide a multipath fading preventing device for radio communication equipment, which does not increase an antenna installation area and can be installed at a low cost.When there is a construct 25 such as a side wall or wire net on th...
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JP2002061130A |
To provide an unnecessary radio wave restraining method for restraining an unnecessary radio wave generated by surrounding road ancillary equipment at communication or sensing time using a radio wave and the road ancillary equipment for ...
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JP2002057519A |
To provide a radio wave reducing device for portable telephone, with which radio waves radiated from the rod-shaped antenna of a portable telephone can be reduced without generating directivity.In a radio wave reducing device 20, a radio...
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JP2002057486A |
To obtain a radio wave absorber for high frequency (1 GHz-70 GHz), which can be made as thin, light-weight and inexpensive as possible and realizes easy installation, while having a highly efficient, wideband radio wave absorbing power.T...
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JP2002057485A |
To provide a composition of an electric wave absorbing body which is applied or installed on a reflective plate for absorbing electric waves of microwave band and millimeter wave band.A base material such as resin comprises a conductive ...
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JP2002050893A |
To provide an electromagnetic wave shield building having a plurality of communication cells which can be formed by forming antennas transmitting only a specified electromagnetic wave on a member partitioning the inside of the building.I...
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JP2002043834A |
To provide a superior radio absorption characteristic which extends over a broad frequency band and which is superior in environment resistance.A bottom surface 121 of a loss dielectric 12 is formed as a flat surface contour; a surface 1...
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JP3252974B2 |
PURPOSE: To reduce cost required for the manufacture and make it suitable for miniaturizing a device by continuously changing the distributive concentration of powdery electromagnetic wave absorbing materials formed on an insulator subst...
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JP2002030741A |
To provide a broadband radio wave absorption band which is targeted not only for a VHF band but also a UHF band under the present circumstances in which adoption of radio wave absorbing walls in a high-rise building has become a common p...
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JP2002009481A |
To provide a rigid light-weight electric-wave absorbing board.An electric-wave absorbing board 1 comprises cement, silica material, fabric-reinforced material, and ferrite of 20-80 wt.% in content, and is provided with a continuous hollo...
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JP2002009522A |
To provide an antenna system mounted on an instrument panel of a vehicle that can suppress deterioration in the reception performance due to an external noise with a simple configuration.In the vehicle where an air-conditioning duct 19 t...
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JP3243789B2 |
To provide a radio absorbent panel whose radio absorbency is excellent and which is suitable for an opening part in a building whose panel thickness is thin. A radio absorbent panel is provided with an insulating substrate 2 which forms ...
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JP2001352386A |
To provide a portable telephone that can reduce an electromagnetic energy emitted from the inside of the portable telephone using radio signals with plural frequencies to a head of a human body.The portable telephone 102 has a transmissi...
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