Patents
Patents for H01Q 21 - Aerial arrays or systems (25,127)
03/1998
03/25/1998EP0831551A2 Antenna device
03/25/1998EP0831550A1 Versatile array antenna
03/25/1998EP0831548A2 Antenna
03/25/1998EP0830754A1 Linear coverage area antenna system for a cdma communication system
03/25/1998CN1037882C 天线系统 Antenna System
03/19/1998WO1998011626A1 Antenna system for enhancing the coverage area, range and reliability of wireless base stations
03/19/1998WO1998011625A1 Antenna system
03/19/1998WO1998011624A1 Multiple frequency antenna
03/19/1998CA2265987A1 Antenna system for enhancing the coverage area, range and reliability of wireless base stations
03/19/1998CA2208467A1 Dual-band, dual polarization radiating structure
03/18/1998EP0829923A1 Device with radiating elements
03/18/1998EP0829922A2 Phase controlled antenna
03/18/1998EP0829918A2 A multifunction structurally integrated VHF-UHF aircraft antenna system
03/18/1998CN1176566A Directivity control antenna apparatus for shaping radiation pattern of antenna of base station in mobile communication system in accordance with estimated directions or positions of mobile stations
03/17/1998US5729237 Probe fed layered antenna
03/12/1998WO1998010309A1 Transmit/receive module for planar active apertures
03/12/1998DE19737136A1 Antennenvorrichtung mit steuerbarer Richtwirkung Antenna device with a controllable directional effect
03/12/1998DE19636151A1 Phase controlled antenna for radar device
03/12/1998DE19636085A1 Antenna array for radar frequency region
03/12/1998DE19636084A1 Phase controlled antenna for radar device
03/11/1998EP0828309A2 Method of fabricating electrical components
03/11/1998CN2276203Y Fixed omnibearing gain broad-band antenna for TV set
03/10/1998US5726662 Frequency compensated multi-beam antenna and method therefor
03/10/1998US5726630 Detection of multiple articles
03/05/1998WO1998009342A1 Antenna device and method for portable radio equipment
03/05/1998WO1998001919A3 A handheld apparatus having antenna means for emitting a radio signal, a holder therefor, and a method of transferring signals between said apparatus and holder
03/04/1998EP0826649A1 Methods of making ferroelectric ceramic-polymer composites for voltage-variable dielectric tuning and structures using same
03/04/1998EP0826250A1 An antenna device with two radiating elements having an adjustable phase difference between the radiating elements
03/03/1998US5724666 Polarization diversity phased array cellular base station and associated methods
03/03/1998US5724051 Antenna assembly
03/03/1998US5724048 Array antenna, in particular for space applications
03/03/1998US5724045 Radar transponder
03/03/1998US5724044 Electrically scanning microwave radiometer
03/03/1998US5724042 Radar module and antenna device
02/1998
02/25/1998EP0825718A1 Oscillator circuit
02/25/1998EP0825676A2 Complementary bowtie antenna
02/25/1998EP0825674A1 Single-wire spiral antenna
02/25/1998EP0825672A2 A dual frequency antenna
02/25/1998EP0825671A2 Dual frequency band planar array antenna
02/25/1998EP0824801A1 Method and apparatus for polarization diversity in a base station using antenna arrays
02/25/1998EP0824766A1 Antenna unit
02/25/1998CN1174632A Multipatch antenna
02/24/1998US5722089 Antenna control device for a radio communication apparatus having a plurality of antennas
02/19/1998DE19633253A1 Antenna for digital selective call
02/17/1998US5719586 Spherical antenna pattern(s) from antenna(s) arranged in a two-dimensional plane for use in RFID tags and labels
02/11/1998EP0823751A2 Antenna switching circuits for radio telephones
02/11/1998EP0823749A1 Integrated stacked patch antenna
02/11/1998EP0823748A2 Antenna
02/11/1998EP0823611A1 Cooling device for electronic modules
02/11/1998CN1173266A Method and apparatus for providing redundant radio coverage within a vellular communication system
02/10/1998US5717410 Omnidirectional slot antenna
02/10/1998US5717407 Patch antenna array capable of simultaneously receiving dual polarized signals
02/10/1998US5717399 Radar device for vehicle use
02/05/1998WO1998005087A1 Dual-band coupled segment helical antenna
02/04/1998EP0822609A1 Device for receiving and/or transmitting an electromagnetic wave
02/04/1998CN2273900Y Aerial for TV set
02/04/1998CN1172356A Mobile radio antenna
02/03/1998US5714962 Array antenna
01/1998
01/28/1998EP0821429A2 Vehicle antenna
01/28/1998EP0686313B1 Antenna system
01/28/1998EP0677210A4 Transmit and receive antenna having angled crossover elements.
01/28/1998CN1171859A Electrical conducting shell structure for coaxial collinear array antenna
01/28/1998CN1171711A Base station for mobile communication
01/27/1998US5712644 Microstrip antenna
01/27/1998US5712643 Planar microstrip Yagi Antenna array
01/22/1998DE4125386A1 Radiation sensor suitable for radar or communication system
01/22/1998DE19629122A1 High-resolution radio direction finder
01/21/1998EP0820116A2 Mobile radio antenna
01/21/1998CN2273056Y Omnibearing antenna for TV
01/21/1998CN1170972A Spiral-shaped array for broadband imaging
01/20/1998US5710987 Receiver having concealed external antenna
01/20/1998US5709968 Non-aqueous electrolyte secondary battery
01/15/1998WO1998001923A1 Antenna array
01/15/1998WO1998001921A1 A planar dual-frequency array antenna
01/15/1998WO1998001919A2 A handheld apparatus having antenna means for emitting a radio signal, a holder therefor, and a method of transferring signals between said apparatus and holder
01/15/1998CA2259564A1 A planar dual-frequency array antenna
01/14/1998EP0818846A2 Planar antenna
01/14/1998EP0818059A1 Wide antenna lobe
01/14/1998EP0818058A1 Phased array antenna provided with a calibration network
01/14/1998CN1170477A Array of radiating elements
01/13/1998US5708971 Two-way paging system and apparatus
01/13/1998US5708833 Antenna cap, antenna connectors and telephone line connectors for computer devices utilizing radio and modem cards
01/13/1998US5708679 Hitless ultra small aperture terminal satellite communication network
01/13/1998US5708446 Printed circuit antenna array using corner reflector
01/13/1998US5708444 Multipatch antenna with ease of manufacture and large bandwidth
01/13/1998US5708442 Correlation radiometer imaging system
01/08/1998WO1998000930A1 A signal processing method utilizing an eigenvector corresponding to the maximum eigenvalue of an autocorrelation matrix of received signals for an antenna array system
01/08/1998WO1998000882A1 Folded mono-bow antennas and antenna systems for use in cellular and other wireless communications systems
01/08/1998DE19627015A1 Antennenarray Antenna array
01/07/1998EP0817312A2 Antenna apparatus
01/07/1998EP0817310A2 Wide-band/dual-band stacked-disc radiators on stacked-dielectric posts phased array antenna
01/07/1998EP0817304A1 Log periodic dipole antenna having a microstrip feedline
01/07/1998EP0815692A2 A two-way paging system and apparatus
01/07/1998EP0815613A1 Dual frequency antenna with integral diplexer
01/07/1998CN1169540A Circularly symmetric, zero redundancy, planar array having broad frequency range applications
01/07/1998CN1036962C Antenna system with helical feeders
01/06/1998US5706015 Flat-top antenna apparatus including at least one mobile radio antenna and a GPS antenna
01/06/1998US5706012 Radar system method using virtual interferometry
12/1997
12/31/1997CN1169209A 天线 Antenna
12/31/1997CN1169042A Antenna apparatus