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JP4294672B2 |
A microstrip reflectarray antenna with a low cross polarization level is disclosed. The microstrip reflectarray antenna of the present invention comprises: a ground plate; a reflecting plate with an upper surface, and a plurality of micr...
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JP4297027B2 |
To provide a lens antenna in which focal length is adjusted substantially constantly regardless of variation in dielectric constant, and excellent antenna gain is ensured while suppressing individual variation. The lens antenna 10 employ...
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JP4291254B2 |
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JP4288423B2 |
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JP2009141983A |
To provide an antenna device using a dielectric lens.The antenna device includes: a dielectric lens of a unitary structure formed of an electromagnetic wave transmission dielectric with a relative permittivity of 3.5 or less, which is sh...
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JP4284361B2 |
A redirecting feedthrough lens antenna system may include first and second phased array antennas coupled together in back-to-back relation. More particularly, the first and second phased array antennas may include respective first and se...
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JP4282623B2 |
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JP4286163B2 |
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JP4280643B2 |
A measurement system is provided that facilitates the measuring of a shape of a flexible electromagnetic radiation structure. The measurement system includes a plurality of local sensors, a central sensor and a measurement processor. Eac...
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JP4279406B2 |
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JP2009124512A |
To provide a radio lens antenna device capable of fully attaining small size, lightweight, and low cost.The radio lens antenna device 1 includes a radio lens 10 formed into a shape of a divided sphere; reflecting plates 20, 30, 40 attach...
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JP4274056B2 |
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JP4273281B2 |
To realize highly reliable and highly accurate folding/unfolding operation while promoting lightening and strengthening. Six pairs of wire members 90, 91 are tensioned by respectively crossing intermediate parts on a diagonal line betwee...
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JP4271650B2 |
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JP2009118459A |
To provide a partially reflective surface antenna which includes a substrate, a reflective sheet and a plurality of supporting units.A signal I/O 212 for receiving and outputting a high frequency signal is formed on an upper surface of a...
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JP2009118531A |
To provide an efficient transmission device for transmitting electromagnetic waves between antennas.The transmission device transmits electromagnetic waves between a first antenna (2) and a second antenna (4) which are spaced away from e...
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JP2008524546T5 |
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JP2009100227A |
To provide a radio wave lens antenna device capable of receiving radio wave transmitted from satellite even if directions of a plurality of satellites are remarkably different from each other, and miniaturized and reduced in the weight a...
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JP2009085951A |
To provide a vehicular radar sensor the sensitivity of which can be adjusted in transmitting and/or receiving operation depending on a traffic condition.This radar sensor includes adjustable transmit and/or receive amplifiers 22, 30, and...
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JP4256943B2 |
A radar lens 14 is made from a conventional Fresnel lens 10, but replaces the conventional curved surface 32 with a stepped approximation thereto 22, 24, 26, preferably of three steps. The thickness of the stepped lens 14, at each step, ...
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JP4253711B2 |
To promote simple constitution, small size and light weight and to contribute to directivity control of high reliability and precision. A mirror surface, installing part of a truss structural body 11, is constituted into a parabola form ...
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JP4247755B2 |
To enhance storability and reduce weight, and improve deployment reliability by providing a truss structure with plurality of sides and installing a link member which connects in a linked form plurality of sliding members to oblique memb...
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JP4247757B2 |
To intend for expediting a compact size and a light weight of a space developable structure by materializing a highly reliable and highly accurate collapsible development operation. 14 collapsible trusses 20 developed by the action of a ...
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JP4249189B2 |
The present invention relates to a reflecting board for a microstrip reflectarray antenna and, more particularly, to a reflecting board with variable slot size that can improve the design flexibilities of the reflecting board and reduce ...
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JP4243013B2 |
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JP4238215B2 |
A communication system including a plurality of horn antennas, a waveguide feed network, and a converter unit coupled to the plurality of horn antennas is disclosed. The waveguide feed network is coupled to each horn antenna, splits an i...
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JP4240521B2 |
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JP4234617B2 |
A disclosed antenna device includes a plate-like ground plate, and a feeding unit that extends from the ground plate for a predetermined length at a predetermined angle. The feeding unit is constituted by a half-body, which is a body, su...
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JP2009044490A |
To provide a radio wave lens in which waterproofness with respect to the adhesion of rain water, snow and ice in the case of flat installation is improved by enhancing structures of a reflecting plate and a lens cover in the radio wave l...
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JP2009033324A |
To enable an antenna using a reflector of an EBG (Electromagnetic band-gap) structure to operate in a plurality of frequency bands.The antenna 1A includes the EBG 1 being a reflector and is configured to arrange an antenna element 15 at ...
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JP2009033588A |
To avoid a situation of rank-down of a channel matrix, even in a real environment where only direct waves exist or the power of direct waves is relatively protruded and becomes enlarged.A receiver comprises three antenna groups, partitio...
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JP2009506585A |
The antenna (10) is a discrete lens array (40) operably coupled to a dielectric material (16) having a first surface (40) and a second surface (52) and a first surface (40). 14) and at least one horizontal feed antenna (18) operably coup...
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JP4221155B2 |
An antenna suited for receiving/transmitting electromagnetic signals from/to at least two satellites, which are fixedly placed at points on the geostationary path, is waveguide or lens type, formed by a multitude of waveguiding channels,...
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JP2009027450A |
To provide a high impedance substrate which has a large ratio band in a low frequency band, and at the same time, is thin enough to be mountable on an electronic device.The high impedance substrate has: a metal plate (1) as a ground plan...
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JP4219557B2 |
The invention relates to a system of antennas for tracking nonsynchronous satellites (21, 22) along predefined trajectories.It is characterized in that the said system includes at least first (11) and second (12) transmitter/receiver ele...
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JP2009010458A |
To reduce loss of electromagnetic wave by leading an electromagnetic wave efficiently to an antenna.A feeder line 2 is arranged on the first surface of a dielectric substrate 1. A ground conductor substrate 3 is arranged on the second su...
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JP4207390B2 |
An antenna receives beams from telecommunication satellites in geostationary orbit close to the equator. The continuous concave reflecting surface of the reflector of the antenna has an equation deduced from a paraboloid by adding theret...
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JP4204086B2 |
A multi-beam automobile radar system includes at least one antenna that forms a total of at least two antenna lobes. At least one of these antenna lobes serves to transmit and receive radar signals. At least one other antenna lobe serves...
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JPWO2006129365A1 |
In order to maintain good electrical characteristics of the antenna device that employs a radio wave lens composed of a hemispherical Luneberg lens combined with a reflector for a long period of time, the lens cover that covers the lens ...
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JP4202572B2 |
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JP4202267B2 |
A space deployable antenna that includes an inflatable envelope, a cylindrical reflector formed on a wall of the envelope, a catenary support frame for maintaining the cylindrical shape of the cylindrical reflector, and a feed array supp...
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JP2008306567A |
To provide a membrane reflector for artificial satellites, giving less effects on the mirror surface accuracy due to a temperature change.The membrane reflector is constituted of a mirror surface part 1 of the membrane reflector, a rear-...
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JP2008546209A |
A surface functional electro-textile fabric incorporates energy-active, electrically conductive or optically conductive fibers and nonconductive fibers in a woven or knitted textile fabric. The weave or knit pattern is selected so as to ...
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JP4198699B2 |
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JP4197846B2 |
The performance of a microwave antenna is improved by incorporating a fine wire dielectric material which has a dielectric constant is in of less than unity at microwave frequencies. The effect of the dielectric material is to refract mi...
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JP2008545340A |
A method for guiding waves over objects, a method for improving a performance of an antenna, and a method for improving a performance of a radar are disclosed. The methods disclosed teach how an impedance structure can be used to guide w...
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JP2008300964A |
To obtain an antenna system capable of preventing a current distribution on a rear mirror plane from being disordered and suppressing deformation of a radiation pattern and a decrease in gain without spoiling the strength of a ring-shape...
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JP2008301237A |
To provide a radio wave lens antenna device capable of being installed by one attaching jig even when installing the radio wave lens antenna device by various different methods, and to provide an installation method of the radio wave len...
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JP2008301352A |
To deal with the problem that a horn antenna is capable of making a beam broad by reducing an opening diameter but impedance matching with a space can not be achieved when the horn opening diameter is reduced into 1 wavelength or smaller...
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JP4195025B2 |
To provide a patch antenna easy to fabricate in a simple process while a probe line is fixed firmly. The flat antenna having a waveguide type LNB with an opening of a waveguide on an upper face includes an array type patch antenna unit, ...
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