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Matches 401 - 450 out of 2,790

Document Document Title
WO2004027919A3
Techniques enabling electronic control of propagation constant associated with meanderline loaded antennas and phased arrays are disclosed. An activation layer can be electronically stimulated to change its characteristics (e.g., capacit...  
WO/2004/042869A1
A transmit antenna for a surface wave radar system, including a linear array of active monopole antenna elements for transmitting signals in respective frequency ranges. The relative spacings and the relative heights of successive elemen...  
WO/2004/042924A2
Voltage controlled oscillator (VCO) gain tracking is used for programming modulation gain settings to minimize modulation distortion in a low bandwidth phase locked loop of a mobile station (10). A synthesizer (20) generates a tuning vol...  
WO/2004/034514A1
A wideband double monopole meanderline loaded antenna having a single feed (110) through a vertical radiator (102), horizontal radiators (104) and vertical supports (114) connected to a ground place (112) is disclosed. Equalizing delay l...  
WO/2004/029562A2
Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter (XMTR) directs a beam of continuous-wave microwave radiation from a transmitting location, and reflected radiation (RCV1) from ...  
WO/2004/027681A2
A radio frequency identification (RFID) tag antenna system includes a planar two arm logarithmic spiral antenna with a suitably small form factor. There are two arms are of conductive foils or etched copper plating on a substrate the ext...  
WO/2004/027919A2
Techniques enabling electronic control of propagation constant associated with meanderline loaded antennas and phased arrays are disclosed. An activation layer can be electronically stimulated to change its characteristics (e.g., capacit...  
WO2003094291A3
The invention concerns a passive tunable broadband antenna. The antenna radiating element consists of stacked toroids (T) connected in series, means (a, c) being provided for shorting the toroids individually and at will, and means (b, d...  
WO/2004/027930A1
The invention relates to a helical antenna comprising at least one helix which is formed by at least two radiating wires (31). According to the invention, at least one of said radiating wires is associated with a parasitic wire (34) havi...  
WO/2004/021563A1
The invention relates to a pre-amplifier circuit (14) comprising at least one transistor (1) coupling a signal input (5) to a signal output. A high-frequency useful signal can be supplied to the signal input (5). Said circuit also compri...  
WO/2004/017459A1
A combined antenna system used for both vehicles and structures, whereby a satellite antenna is placed concentrically around a conventional mast antenna that can be used for both conventional FM radio and also terrestrial retransmission ...  
WO2003090311A3
A measuring while drilling system (28) typically has a metal pipework (16) extending underground connected to an antenna (26a). The metal pipework (16) and the antenna (26a) are both connected to a type of downhole equipment. The antenna...  
WO/2004/010457A1
An antenna arrangement for generating an rf field distribution at a plasma generating region inside a chamber wall of a process chamber of a plasma processing apparatus is described. The antenna arrangement includes an rf inductive anten...  
WO/2004/004061A1
RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may inc...  
WO/2004/001896A1
The present invention relates to a multiple band-type antenna and method of producing the same. In the present invention, a connecting part is disposed between a helical antenna element and a connector to have a space and form an impedan...  
WO/2004/001895A1
An antenna for portable radio in which a high gain and a wide band are realized. An inverted L-shaped antenna (10) is a feeding element having one end part connected electrically with one plate surface of a circuit board (12) through a f...  
WO/2003/107483A1
An antenna element is disclosed, having a ground plane (106), a helix (104) disposed above the ground plane (106), the helix (104) being connectable to a communications apparatus at a helix end (214) located near the ground plane (106), ...  
WO/2003/107478A1
A small antenna operating at a plurality of frequency bands comprising a pattern of antennal elements (14) resonant at a plurality of frequency bands formed as a plurality of helical lines on the outer circumferential surface of an anten...  
WO/2003/105276A1
An antenna including a base (10), a windback coil (12) including a longitudinal portion (16) and a coil portion (20), mechanically mounted onto the base and electrically coupled thereto, and a second coil (22) mechanically mounted onto t...  
WO/2003/094291A2
The invention concerns a passive tunable broadband antenna. The antenna radiating element consists of stacked toroids (T) connected in series, means (a, c) being provided for shorting the toroids individually and at will, and means (b, d...  
WO/2003/090311A2
A measuring while drilling system (28) typically has a metal pipework (16) extending underground connected to an antenna (26a). The metal pipework (16) and the antenna (26a) are both connected to a type of downhole equipment. The antenna...  
WO/2003/071631A1
A multifilar helix antenna comprises a plurality of helical antenna filaments each having a square waveform pattern along its length, giving reduced axial length. Also described is a multifilar helix antenna comprising a plurality of hel...  
WO/2003/067703A1
An antenna device has at least one antenna element (3) with two radiators (4 and 5) disposed on a retainer member (23). The retainer member may be a separate unit but may also constitute an integral part of a casing (1) for a cell or mob...  
WO/2003/060677A1
The present invention relates to a desktop personal computer (desktop pc). Especially the present invention relates to a heat sink from a high heat radiation devices such as a cpu, a vga chip in a desktop pc. The structure of this invent...  
WO/2003/050917A1
An antenna system comprising a plurality of antennas (70, 76, 140, 142) designed and oriented to provide one or more of radiation pattern, signal polarization and spatial diversity. The various diversity operational characteristics are a...  
WO/2003/046738A1
A hybrid serial/parallel bus interface method for a base station has a data block demultiplexing device (40). The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block into a pl...  
WO/2003/047034A1
A first loop antenna (2) for GPS use is formed on a dielectric board (10) to make a small−sized composite antenna for action in different frequency bands. A second loop antenna (3) for electromagnetic beacon in VICS is formed almost co...  
WO/2003/044895A1
A QHA antenna and feed network for a GPS receiver has a helical antenna with a pair of baluns mounted on a PCB at right angles to a central axis of the antenna. Each balun can provide or combine two RF signals 180° phase shifted relativ...  
WO/2003/044894A1
An antenna assembly (2) for a wireless communication device including a first electrically conductive loop (L1) in a first plane, a second electrically conductive loop (L2) in a second plane orthogonal to the first plane, and a block of ...  
WO/2003/038945A1
A multiple-surface antenna, and a method of receiving signals using an antenna, are disclosed. The multi-surface antenna includes a multi-surface dielectric substrate and a conductive trace formed on at least two surfaces of the dielectr...  
WO/2003/038944A1
The present invention relates to an antenna for wireless communication. The antenna includes a holder part having a cylindrical shape, of which one end and side portion are closed, and a main rod part of which one end is connected with t...  
WO/2003/036760A1
In a transmission antenna comprising an antenna coil that has a core around which a coil wire are wound and a capacitor that is connected to the coil wire and forms a series resonant circuit along with the inductance of the antenna coil,...  
WO/2003/036761A1
A transmission antenna comprises an armature coil equipped with a winding−wound core and a capacitor connected to the winding for forming a series resonance circuit with the inductor of this antenna coil. This antenna coil comprises a ...  
WO/2003/034603A1
A mobile communication system has a multi-band antenna capable of receiving and processing signals of GPS, CDMA, and PCS bands. In the system, a GPS processing section receives a signal of a first frequency band, so as to generate global...  
WO/2003/034535A1
An integral antenna that receives television and FM radio signals and satellite radio signals includes a multi−element antenna portion having a boom (12) supported by a mast (22) and a plurality of parallel, spaced apart dipole element...  
WO/2003/030300A1
An antenna coil (10) comprising an air−core coil (12) coiled in a spiral shape within a plane, and a flat magnetic−core member (13) inserted in the air−core coil (12) so as to be almost parallel to the plane of the coil (12). The m...  
WO/2003/030302A1
An antenna (1) for use in a radio communication device the antenna having a length of not greater than 100mm and including a first portion (3) comprising a conductive helical coil extending along an axis (2) and located between and elect...  
WO/2003/023901A1
A base station antenna array comprises a ground plane (34) and a parallel array of antennae (50) above the ground plane (Figs. 8-14). The antennas each have a progression of radiating elements (65) whose length increases in a direction a...  
WO/2003/021824A1
A radio terminal testing instrument comprises an antenna coupler (20), a connection member (16), and a measuring unit (15). The antenna coupler (20) has a placing member (35), a coupling antenna (25), a pair of through−connection porti...  
WO/2003/017420A1
Antennas and methods of manufacturing and using antennas suited for use in mobile devices are described. The described antennas include an antenna arm (104) and a conical spring radiating element (108) attached to one end of the arm. The...  
WO/2003/015215A1
Frequency-dependent phase center movement in near-field, unshielded, electromagnetic susceptibility testing using a log-periodic dipole can be significantly reduced by bending the rearmost dipole elements forward. Each bent dipole elemen...  
WO/2003/003515A1
There is disclosed a meanderline loaded antenna comprising a ground plane, a non driven vertical element affixed thereto, a driven vertical element and a shaped top radiating element conductively connected between the driven and non-driv...  
WO/2002/101879A1
An antenna. The antenna (20) includes a first dielectric antenna rod (22) having a first dielectric constant (23). The first dielectric antenna rod is coupled to a first frequency transmission source (27) for propagating first frequency ...  
WO/2002/099928A1
There is disclosed a meanderline-loaded antenna comprising a ground plane, a non-driven element affixed thereto, a driven or receiving element fixed thereto and a horizontal element between the driven and the non-driven elements. The non...  
WO/2002/097922A1
An antenna of generally symmetrical form and having a longitudinal axis comprising: a feed point member located at one end of the antenna; an attachment point means at the other end of the antenna to the one end and spaced axially from t...  
WO2001052354A9
An antenna. The antenna (20) includes a first dielectric antenna rod having a first dielectric constant ( epsilon 3). The first dielectric antenna rod (22) is coupled to a first frequency transmission source (27) for propagating first fr...  
WO/2002/087017A1
This invention relates to antennae and in particular to antennae of the multi-element helically wound type. An helical antenna according to the invention has at least one conductive helix having a vertically orientated central longitudin...  
WO/2002/084799A1
A multi-filar spiral antenna for a telecommunications device. The antenna comprises at least two spiral arm radiating elements each having an outer end and an inner end. A feed is connected to each outer end. When an electrical signal is...  
WO/2002/067373A1
Antenna systems for use with wireless communicators, such as radiotelephones, are provided and include a first antenna configured to be internally mounted within a wireless communicator and a retractable, second antenna that couples with...  
WO/2002/063719A1
A built-in antenna used in transmitting/receiving radio waves of several gigacycles is improved and downsized for suitability in industrial production and increase in tuning band width. An antenna pattern (6) resonating at $g(l)/4' is fo...  

Matches 401 - 450 out of 2,790