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| Number | Title | Issue Date |
| 8125399 | Adaptively tunable antennas incorporating an external probe to monitor radiated power An embodiment of the present invention an apparatus, comprising an apparatus, comprising an adaptively-tuned antenna including a variable reactance network connected to the antenna, an RF field probe located near the antenna, an RF detector to sense voltage from the... | 02/28/2012 |
| RE40972 | Tuning techniques for a slot antenna A wireless communication device and method for identifying a container, or communication information about a container, using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the contai... | 11/17/2009 |
| 7432869 | Multiple feed point slot antenna A wireless communication device and method for identifying a container, or communication information about a container using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the contain... | 10/07/2008 |
| 7239283 | Antenna There is disclosed an antenna having a tapered radiating element possessing a slow-wave structure along a tapered radiating edge thereof. The radiating element is combined with a ground plane conductor to form a monopole antenna. The slow-wave structure supports an ... | 07/03/2007 |
| 7205944 | Methods and apparatus for implementation of an antenna for a wireless communication device A wireless communication device includes an antenna configured with two conductive elements separated by an insulating medium. One conductive element is a ground plane and the other is a microstrip line. The ground plane is formed with a bend proximate an end. The m... | 04/17/2007 |
| 7198198 | Antenna device and communication device using antenna device An antenna device (60) is provided that is used in a recorder and/or writer destined for writing and reading data to and from a contactless IC card (1). The antenna device (60) includes a loop coil (61) that radiates a magnetic field, mag... | 04/03/2007 |
| 7145516 | Wireless internal antenna for home network and digital electric home appliance Disclosed is a wireless internal antenna for a home network and digital electric home appliance which comprises: a wireless antenna for a client having a tuning slot at an upper surface of a client device to realize an impedance matching at a band of IEEE802.11b (a ... | 12/05/2006 |
| 7129839 | Device for monitoring an area The present invention relates to a monitoring device (1) with a transmitter unit (2) and a receiver unit (3) for monitoring an area. Slotted cables serve as antennas. According to the invention, a first slotted cable is arranged as a transmittin... | 10/31/2006 |
| 7034764 | Antenna device An antenna device has a circular radiation plate with a diameter of substantially ½ wavelength in electric length faced to a ground plate with a first power supply port and a second power supply port in its periphery. The power supply ports are disposed at position... | 04/25/2006 |
| 7030763 | Method for manufacturing electronic tag In the event of the shipment of electronic tags from a manufacturer to a customer, a number of the electronic tags required by the customer are adhered to a double-faced adhesive tape and then the double-faced adhesive tape is wound on a reel. Then, this reel is con... | 04/18/2006 |
| 6985119 | Multiple feed point slot antenna A wireless communication device and method for identifying a container, or communication information about a container using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the contain... | 01/10/2006 |
| 6759991 | Antenna arrangement An antenna arrangement comprises a patch conductor (102) supported substantially parallel to a ground plane (104). The patch conductor includes first (106) and second (108) connection points, for connection to radio circuitry, and further... | 07/06/2004 |
| 6628237 | Remote communication using slot antenna A wireless communication device and method for identifying a container or communication information about a container using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding t... | 09/30/2003 |
| 6509879 | Antenna for a radio communications apparatus The disclosure relates to an antenna. To improve transmission and reception in a mobile telephone, it has what is termed a diversity antenna. The invention relates to an antenna suitable as a diversity antenna. The antenna has a plate of insulating materi... | 01/21/2003 |
| 6337662 | Antenna for radio communications apparatus An antenna for a radio communications apparatus operates in the frequency range of 800 MHz-3 GHz. The antenna has two radiating elements. The first radiating element is a slot in a substantially planar foil or disc-shaped metallic conductor. The second ra... | 01/08/2002 |
| 6307519 | Multiband antenna system using RF micro-electro-mechanical switches, method for transmitting multiband signals, and signal produced therefrom A method and system for transmitting, and a signal comprising multiple frequency bands from a single slot antenna are disclosed. The system comprises a slot antenna and a micro-electro-mechanical (MEM) switch, coupled to the slot antenna. The MEM switch i... | 10/23/2001 |
| 6282433 | Personal communication terminal with a slot antenna A personal communications terminal includes a telephone unit and an application processing unit that are operatively connected. The telephone unit includes a first RF transceiver for communicating with a cellular communications network via an external dip... | 08/28/2001 |
| 6188369 | Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment In a coaxial resonant slot antenna including a flat rectangular conductive box having its top plate with a slot being defined therein, and a strip conductor disposed inside the box and electrically insulated from the box while high frequency or RF power i... | 02/13/2001 |
| 6034644 | Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment A coaxial resonant slot antenna includes a flat rectangular conductive box having its top plate with a slot being defined therein, and a strip conductor disposed inside the box and electrically insulated from the box while high frequency or RF power is fe... | 03/07/2000 |
| 6028561 | Tunable slot antenna In order to offer a tunable slot antenna capable of varying an impedance matching center frequency thereof, there is provided a coaxial resonant slot antenna for supplying RF power to a strip conductor placed in a flat conductive cubic with a slot formed ... | 02/22/2000 |
| 5946610 | Portable radio apparatus having a slot antenna The invention provides a small portable radio apparatus including a slot antenna member. The slot antenna member has an improved form disposed in a casing. The casing has a curvedly bulging side edge surface. Thus, there is no useless space in the casing ... | 08/31/1999 |
| 5754143 | Switch-tuned meandered-slot antenna An electrically-short meandered-slot antenna having a plurality of switch-selected resonant frequencies is described. Meander slot sections are substantially parallel, closely coupled, electrically significant, and substantially equal in length to the ove... | 05/19/1998 |
| 5461393 | Dual frequency cavity backed slot antenna A dual frequency cavity backed slot antenna and method of tuning the antenna, wherein the antenna comprises a plurality of stacked layers including a layer having a substrate with an accessible surface, the surface including thereon a continuous slot, fir... | 10/24/1995 |
| 5432518 | Closed slot antenna having outer and inner magnetic loops An RF identification system having an interrogator operable to send RF interrogations to a transponder and to receive RF responses from the transponder. The interrogator is in electrical communication with a closed slot antenna. The closed slot antenna is... | 07/11/1995 |
| 5194876 | Dual polarization slotted antenna An inexpensive, efficient, broadband, slot-type antenna with unidirectional sensitivity includes a slot-forming means defining a plurality of substantially concentric and generally coplanar annular slots and a non-resonant antenna connection means for tra... | 03/16/1993 |
| 5055853 | Magnetic frill generator An electromagnetic field is produced by an oscillating magnetic frill that is generated at a slot gap in a resonating toroidal cavity. The magnetic frill's generating structure is physically small in relationship to its operating wavelength. Due to its sm... | 10/08/1991 |
| 4994817 | Annular slot antenna An inexpensive, efficient, broadband, slot-type antenna with unidirectional sensitivity includes a slot-forming means defining a plurality of substantially concentric and generally coplanar annular slots and a non-resonant antenna connection means for tra... | 02/19/1991 |
| 4855749 | Opto-electronic vivaldi transceiver A planar integrated opto-electronic transceiver apparatus having a pair of broadband tapered slot line antennas which are monolithically integrated on an ion implanted silicon on sapphire substrate. An optical pulse which is applied to the narrow slot of ... | 08/08/1989 |
| 4803494 | Wide band antenna A cavity backed crossed slot antenna wherein the cavity depth d is less than one eighth of the operating wavelength λ at the lowest frequency of operation, the major dimension a of the cavity in the plane of the slots is less than one half of the wavelen... | 02/07/1989 |
| 4495503 | Slow wave antenna Slow wave antenna including slow wave structure of a helical coiled conductor having linear capacitance and inductance distribution. Driving point impedance is changed by varying the ratio of the distributive capacitance to the distributed inductance. Tun... | 01/22/1985 |
| 3943520 | Nose cone capacitively tuned wedge antenna Disclosed herein is an antenna system for use with small projectile nose es (metal). The antenna comprises a wedge shaped metallized dielectric material having an electrical length equal to one-quarter wavelength as measured inside the center line of the... | 03/09/1976 |
