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JP4615170B2 |
This invention discloses an interference cancellation method based on smart antenna, which can solve various interference in mobile communication system such as multipath propagation etc., while using smart antenna. It comprises: with be...
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JP4584727B2 |
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JP4569015B2 |
A wide-band array antenna using a single real-valued multiplier for each antenna element is simple in construction and suitable for wide-band code division multiple access (WCDMA) mobile communication systems. A rectangular array antenna...
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JP4563635B2 |
This invention discloses a baseband processing method based on smart antenna and interference cancellation, which includes: A. making channel estimation to get channel response; B. picking up useful symbolic level signal from received di...
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JP4555218B2 |
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JP4542141B2 |
A satellite communication subscriber device includes a smart antenna for generating antenna beams for receiving signals from at least one satellite, and a receiver. The receiver includes a quality metric module for calculating a quality ...
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JP4540936B2 |
A mobile terminal has a first antenna (102) as an omnidirectional antenna, a second antenna (103) as a directional antenna and a switching unit (301) for switching over the antenna for receiving.
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JP4528005B2 |
An antenna system includes a plurality of cascading power dividers (41, 46, 148) that work in conjunction with a plurality of mechanical phase shifters (40) to vary a beamwidth and/or an azimuth scan angle of a beam that radiates from ac...
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JP4527490B2 |
The antenna has concentric outer and inner annular slots (60, 62), each comprising two rectangular protrusions (61, 63) on its outer and inner rim, respectively. The slots are supplied through two accesses by two common supply lines (64,...
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JP4518364B2 |
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JP4519710B2 |
A multibeam primary radiator apparatus ( 2 ) includes first, second and third primary horns ( 16, 18, 20 ). The first primary horn ( 16 ) has a generally circular proximal end aperture ( 22 ) at its proximal end, and a generally circular...
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JP2010154157A |
To rapidly allow the direction of an antenna to coincide with the direction of a radio wave origination source, and also to raise accuracy in direction control. An antenna direction control device includes: a reference value storage part...
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JP4494534B2 |
A satellite communication network (10) coordinates multiple steerable satellite beams (28) with user requests for connections requiring varying bandwidth in real-time. A control station (22) gathers user requests for connections (64) and...
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JP2010122044A |
To provide a method for measuring beam orientation direction of a multi-beam transmitting antenna capable of measuring highly accurately an actual beam orientation direction of each beam without pattern scanning, even when a plurality of...
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JP2010517459A |
A signal generation system suitable for use in a radar system comprises a local oscillator (LO) and an intermediate frequency (IF) oscillator, wherein the IF oscillator is a Direct Digital Synthesizer (DDS), and the LO is a free running ...
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JP2010098507A |
To provide a compact microstrip antenna that can continuously detect a moving state of a body to be detected which is present in front of a sensor by controlling the radiation direction of a radio wave beam, and to provide a radio wave s...
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JP2010093399A |
To provide an antenna apparatus where a side lobe is suppressed with a simple method.The antenna apparatus includes a plurality of array antennas which are different in length. The plurality of array antennas with different lengths are c...
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JP4454641B2 |
A method and apparatus for improving the reception characteristics for lower-power portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each havin...
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JP4454642B2 |
A method and apparatus for improving the reception characteristics for lower-power portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each havin...
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JP4384658B2 |
A phased array antenna system with variable electrical tilt comprises an array of antenna elements etc. incorporating a divider dividing a radio frequency (RF) carrier signal into two signals between which a phase shifter introduces a va...
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JP4386857B2 |
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JP4371124B2 |
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JP2009267619A |
To provide a multi-feed horn, a low-noise block downconverter and an antenna apparatus which allow further improvement in the reception characteristic and in the manufacturing accuracy.A multi-feed horn 1 includes a first feed horn 11, a...
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JP4362677B2 |
An antenna system that includes a plurality of mounting plates arranged in a generally circular configuration. Each mounting plate has an inside surface and an outside surface. Each antenna element has a high frequency end and a low freq...
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JP4351170B2 |
A wireless system, which minimizes nulls within the wireless system, while simultaneously providing diversity. A wireless system will now have increased capacity and coverage due to an enhanced signal to interference ratio in the areas o...
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JP4337457B2 |
An antenna device (100; 100A) is provided which is capable of dealing with two or more frequencies or of carrying out communications using two or more communication methods by a single antenna and of controlling its directivity and, ther...
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JP2009194475A |
To provide a phased array antenna which outputs a multibeam while switching the direction for forming the multibeam instantaneously and selectively by a DBF method.Signals received by antenna elements arranged in two-dimensional matrix i...
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JP4319782B2 |
The invention provides a method and apparatus for determining the direction of a signal such as for example a received radio signal in a cellular mobile communication system. At lest two antenna arrays (10, 12) are connected to associate...
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JP4308299B2 |
An antenna arrangement for a Multiple Input Multiple Output (MIMO) radio system, the antenna arrangement transmitting and receiving in three essentially uncorrelated polarizations. The arrangement includes first and second patches, and f...
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JP4298921B2 |
A compact RF monopulse receiver circuit having a relatively low noise figure which is particularly useful for operation in the millimeter wave frequency range is described. The compact monopulse receiver finds use in small projectile and...
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JP4298173B2 |
A dielectric resonator antenna (100) having a resonator (104) formed from a dielectric material mounted on a ground plane (108). The ground plane (108) is formed from a conductive material. First and second probes (112, 116) are electric...
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JP4291809B2 |
To read RFID tag information not depending on the antenna position of an RFID tag in conveyance containers such as cargo cars, which are provided with the RFID tag. In the cargo car 1, a plurality of induction antennas 22-1 to 22-3 are f...
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JP4268202B2 |
A forward looking sensor (310) has a transmit circuit with a transmit antenna, and a receive circuit with a receive antenna. The transmit antenna has radiating elements that generate thirteen beams (330a - 330m) spaced relative to one an...
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JP4247436B2 |
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JP4243611B2 |
A planar waveguide structure for creating a phase gradient between the input signals of a system of antenna elements requires relatively little space and also ensures relatively low-loss beam deflection. The waveguide structure is provid...
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JP4242453B2 |
A method and apparatus for improving the reception characteristics for lower-power portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each havin...
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JP2009044509A |
To reduce a design cost and a member cost of a frequency processor and to make a detection angle of an incoming radio wave wide.Antenna element setting sides of two reception antennas are mutually faced, and they are arranged so that an ...
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JP4223179B2 |
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JP4217711B2 |
In a variable power divider including a first 90° phase combiner (30), a second 90° phase combiner (40), and a phase-amplitude adjustment block (50), the phase-amplitude adjustment block (50) includes, correspondingly to two-channel po...
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JP4215887B2 |
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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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JP4192782B2 |
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JP4185222B2 |
The active panel antenna has a number of radiating elements (3) and a multibeam radiating structure (6) together with connection layers (8a,8b). The radiating structure is perpendicular to the antenna plane and the connection and radiati...
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JP4187104B2 |
A base station device provided with a plurality of antennas has a mode, in which all the antennas are used, and a mode, in which the plurality of antennas are divided into a plurality of groups each including two or more antennas to be u...
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JP4188456B2 |
The monopulse antenna construction has two waveguides (41,42) side by side on a metallic base (25) for feeding antennas. The waveguides are fed by narrow height waveguide sections (47,48) with a backing short circuit and microstrip trans...
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JP2008283558A |
To raise precision of tracking when a plurality of antennas are switched to be used in communication equipment which tracks radio waves from a mobile object by the antennas.A switching means 5 switches the antennas so that one system of ...
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JP4183134B2 |
The present invention provides a smart antenna and a method and a device for beam forming of the smart antenna. The forming beam method includes: multipath scanning of received signals with discrete beam to obtain multipath delay informa...
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JP2008278033A |
To provide an optical control type array antenna system capable of suppressing emission of an unwanted waves into space.The optical control type array antenna system includes a light-emitting unit 21, which receives a multiplexed optical...
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JP4181173B2 |
A multibeam antenna includes: a photonic bandgap material ( 20 ) having at least one band gap; at least one periodicity defect so as to produce at least one narrow bandwidth inside the at least one band gap of the photonic bandgap materi...
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