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JP4235068B2 |
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JP4234643B2 |
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JP4234645B2 |
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JP2009044332A |
To provide a multiport helical antenna capable of selectively receiving broadcasts at a plurality of different frequency bands.The antenna 10 has: a helical antenna 100; a port P1 connected to a first contact of the winding start end of ...
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JP2009044331A |
To provide a multiport helical antenna capable of selectively receiving broadcasts at a plurality of different frequency bands.The antenna 10 has a helical antenna 101 and a monopole antenna 102 that are short-circuited at the tip of the...
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JP2009038806A |
To provide small-sized RF components.A plurality of components for guiding or controlling RF and microwave radiation are integrated by a plurality of electrodepositions and/or a plurality of laminated materials. The components include a ...
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JP4226373B2 |
A phased array antenna includes a circuit board and a balanced, series fed antenna array formed from a plurality of antenna elements positioned in at least two spiral antenna arms on the circuit board. At least one signal feed point is p...
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JP4215363B2 |
In an antenna unit adapted to be incorporated inside a main body of a mobile radio set, there are provided a pair of helical antenna elements (102), (103) connected to a balanced feeding line (104), the helical antenna elements having an...
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JP4213345B2 |
A multifilar antenna ( 200 ) comprises n spaced antenna filaments, where n is on integer greater than 1; a matching circuit ( 210 ) for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving appar...
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JP4196847B2 |
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JP4196554B2 |
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JP2008301100A |
To provide antenna equipment suitable for reception of radio waves from a satellite and ground waves by a portable information terminal device.The antenna equipment includes a plurality of built-in antennae, each consisting of an inverse...
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JP2008294791A |
To provide a spiral slot antenna in which bidirectional directivity can be obtained and which can be made compact.The spiral slot antenna is comprised of a multilayer substrate formed by holding a conductor plate 3 to be an inner layer b...
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JP2008294809A |
To provide a stacked helical antenna whose frequency reduction is easy.The stacked helical antenna is equipped with: a plurality of dielectric layers arranged by being stacked; a plurality of first radiation electrodes arranged on any of...
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JP4189861B2 |
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JP2008288702A |
To provide a mounting structure for a chip antenna which has superior shock resistance.In the mounting structure where the chip antenna 1 having a columnar base body 2 made of a dielectric or magnetic body, a radiation conductor 3 provid...
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JP4188305B2 |
To provide a monitoring device, a periphery monitoring system, and a vehicle by which a wide range around a vehicle can be monitored with a small number of radar sensors and which are less affected by the states of a road surface. The mo...
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JP4188412B2 |
An antenna for use at UHF and upwards has a cylindrical ceramic core (12) with a relative dielectric constant of at least 5. A three-dimensional radiating element structure, consisting of helical antenna elements (10A - 10D) on the cylin...
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JP4182161B2 |
A stereoscopic antenna includes a planar electroconductive pattern 2 adapted to be grounded, a loop-shaped antenna body 3 having an axis C0 lying perpendicular to the planar electroconductive pattern 2, and an antenna connection 4 for co...
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JP2008270876A |
To provide an inexpensive antenna system for television broadcast reception whose component cost is reducible by decreasing the number of variable capacitance elements.Disclosed is the antenna system for television broadcast reception, w...
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JP4176761B2 |
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JP4173630B2 |
Antenna systems for transmitting and receiving electrical signals in two widely separated frequency bands are provided which comprise a helix antenna and a parasitic element which is adjacent to the helix antenna. The parasitic element i...
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JP2008252789A |
To accommodate a directional antenna effective for a long-distance communication in a robust and thick dielectric container that is small in capacity, proof against explosion without deteriorating the original antenna directional charact...
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JP2008244520A |
To attain a high efficiency planar array antenna by improving the reflection characteristics without inclining a beam.In a microstrip array antenna, the width of a feeding strip line 13 is set to match the impedance on the input side and...
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JP4159140B2 |
There is increasing need for modern radar systems to provide target recognition and classification and effective operation in a hostile environment. These requirements demand wide frequency bandwidth operation which must be addressed by ...
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JP4159749B2 |
A UHF antenna has an electrically insulative cylindrical core of a solid material having a relative dielectric constant greater than 5, and a three-dimensional antenna element structure disposed on or adjacent the outer cylindrical surfa...
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JP4154557B2 |
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JP4155359B2 |
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JP4154556B2 |
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JP2008211719A |
To provide an electronic device in which an antenna is configured that has radiation strength in one of two opposite directions and does not have the radiation strength in the other direction, and information received via the antenna is ...
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JP2008210863A |
To provide a highly stiff hollow magnetic shield sheet that has a hole for inserting a terminal projecting in the thickness direction of a coil and is free in shape and plate thickness.In the magnetic shield sheet where magnetic powder i...
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JP4147696B2 |
The present invention relates to an antenna mainly used in a cellular phone or the like and to a communication terminal using it. It is an object of the present invention to provide an antenna having a high radiation efficiency, a wide a...
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JP4147260B2 |
An antenna for use at UHF and upwards has a cylindrical ceramic core (12) with a relative dielectric constant of at least 5. A three-dimensional radiating element structure, consisting of helical antenna elements (10A - 10D) on the cylin...
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JP4138817B2 |
In a helical antenna to be installed inside a mobile communication terminal, for processing low-bandwidth signals, a substrate is made of magnetic dielectric material, a plurality of lower electrodes are disposed on the underside of the ...
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JP4129038B2 |
A helical element, which is operated in the frequency band of FM broadcast, is wound around the outer periphery of a rod-shaped support member 10. A line-shaped element 12, which is operated in the frequency band of terrestrial digital t...
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JP4125671B2 |
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JP4124571B2 |
A broadband antenna having closely spaced dipole antenna elements to form a log-periodic array, arranged normal to a signal feed network having a separate feed line for each of the dipole elements. The length of each feed line is selecte...
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JP4109298B2 |
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JP4105273B2 |
Multiple helical coils (110, 120, 130) are placed side-by-side and coupled to a conductive straight portion (140) of an antenna to provide a multi-band antenna structure. The helical coils (110, 120, 130) are distanced from one another t...
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JP2008141651A |
To obtain a helical antenna also suitable as an antenna receiving the radio waves in high frequency band by enhancing the antenna gain and the rigidity even if an outer coiled conductor is made thin and making the antenna compact.The out...
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JP2008141653A |
To obtain a helical antenna also suitable as an antenna receiving the radio wave in high frequency band by enhancing the rigidity without deteriorating moldability even if an outer coiled conductor is made thin and making the antenna com...
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JP4101459B2 |
A quadrifilar antenna for use in satellite communications comprises four conductive elements arranged to define two separate helical pairs, one slightly differing in electrical length than the other, defined by a cylinder of constant rad...
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JP4102230B2 |
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JP4101514B2 |
The present invention aims at supplying an electric current to a helical antenna in a non-contacting manner.A dielectric tube is provided on an outer surface thereof with a feeding input terminal, strip conductors and hybrid ICs. The die...
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JP4099309B2 |
In a method of producing a quadrifilar antenna for circularly polarised radiation at frequencies above 200 MHz, the antenna is tuned by coupling it to a test source, measuring the relative phases and amplitudes of currents at predetermin...
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JPWO2006059568A1 |
An antenna device that achieves high gain with a compact and flat configuration and can switch the main beam direction. The diamond-shaped antenna portions composed of 101a to 101d, 102a to 102d, and 103a to 103d are arranged side by sid...
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JP2008131647A |
To provide an LPDA antenna with improved performance over a broad frequency range.An LPDA antenna 700 includes a first antenna element 200a, a second antenna element 200b and a pair of transmission line structures 500a and 500b. The firs...
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JP4090728B2 |
Disclosed herein is a chip antenna. The chip antenna has a base block, and primary and second conductor lines. The base block is comprised of opposite top and bottom surfaces and side surfaces between the top and bottom surfaces, and mad...
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JP4090875B2 |
The present invention relates to an electromagnetic wave transmission/reception source for a multireflector antenna of the Cassegrain type comprising longitudinal-radiation means operating in a first frequency band and an array of n radi...
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JP4093077B2 |
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