Matches 1 - 50 out of 117 1 2 3 >
Match Document Document Title
7369094 Dual-frequency high-gain antenna  
A dual-frequency high-gain antenna is provided, which includes: a diplexer loop portion disposed at the center of the antenna substrate for receiving a feed signal; two single-frequency radiation...
7362272 Circularly polarized antenna  
The present invention relates to techniques to excite a circularly polarized antenna and, more particularly, to a circularly polarized antenna having a QUAD-EMC unit structure. It comprises plural...
7298345 Dipole antenna element  
Described is a dipole which may includes a feed line electrically coupled to a first antenna element; a balun electrically coupled to a second antenna element; and a short assembly slidably coupled...
7292202 Range limited antenna  
Range limited antenna includes first and second pair of antenna elements, and an RF signal processing network connected to both pair of antenna elements. The network has a function, F(Ξ,x)≈Φ A...
7193579 Balanced dipole antenna  
A balanced dipole antenna has a coaxial cable connected between a load or source and the left and right dipole arms to substantially eliminate common mode current and radiative coupling between the...
7116281 Universal dipole with adjustable length antenna elements  
Described is a universal dipole which may include a feed line coupled to a first fitting; a balun coupled to a second fitting; a first variable length antenna element coupled to the first fitting;...
7106269 Omni-azimuthal pattern generator for VLF and LF communication  
A relative phase shift is induced in the signals of a pair of identical orthogonal antennas such that when the signals are combined the signals are 90 degrees out of phase. This is done in order to...
7053853 Planar antenna for a wireless mesh network  
A planar antenna that facilitates directional communication to a mesh network. The antenna is housed in a relatively small, planar package that can easily be attached to a window pane to enable the...
7009575 High-frequency two-dimensional antenna and associated down-conversion method  
A high-frequency two-dimensional antenna includes a plurality of dual-frequency antennas configured to receive signals having first and second frequencies above the microwave band of the...
6999041 Dual frequency antennas and associated down-conversion method  
A dual frequency antenna includes a plurality of dipole antennas configured to receive first and second frequencies. The antennas are arrayed to an effective length to reradiate at a third...
6987486 Ground arrangement for a device using wireless data transfer  
The invention relates to a ground arrangement of a device using wireless data transfer. In order to improve the electric properties of the device and to minimize the SAR value of the device, at...
6950076 Two-dimensional dual-frequency antenna and associated down-conversion method  
A two-dimensional dual-frequency antenna array includes a plurality of dual-frequency antenna array elements configured to receive signals having first and second frequencies. The array elements of...
6940462 Broadband dipole antenna to be worn by a user and associated methods  
An antenna includes a dipole feed, a first dipole element connected to and extending outwardly from the dipole feed, a transmission line extending from the dipole feed in an opposite direction, and...
6885351 Antenna  
An antenna with first and second spaced radiating elements extending from a vertex at respective first ends and diverging from each other in a direction outward from the vertex to respective second...
6876337 Small controlled parasitic antenna system and method for controlling same to optimally improve signal quality  
The invention relates to a small (0.5 wavelength or less) adaptable antenna system. In particular it relates to the use of loaded parasitic components in the antenna aperture for the purpose of...
6873298 Plastenna flat panel antenna  
A flat panel antenna, monopole or dipole, formed from a conductive loaded resin-based material containing micron conductive powders or micron conductive fibers to provide conductivity. The monopole...
6823177 Radio station with circularly polarised antennas  
A radio station including two antennas combined with respective first and second hybrid transmission polarization couplers is disclosed. Each antenna is arranged to generate two orthogonal electric...
6693602 Antenna system  
An antenna system ( 1 ) with a particularly simple Con and a steep transmission angle, for lower frequencies in the short wave range. The inventive antenna system includes two antennae ( 2 ) which...
6583760 Dual mode switched beam antenna  
Systems and methods for providing antenna beams having reduced grating and side lobes when steered off of the antenna broadside are disclosed. According to the present invention an arrangement of...
6483477 RF receiving antenna system  
An antenna system is provided for receiving horizontal and vertical components of a transmitted RF signal and for minimizing the magnitude of one of the components prior to application to an RF...
6473054 Array antennas with notched radiation patterns  
A source of interference signals may be present at a fixed incident angle relative to a stationary antenna. Horizontal array antennas are provided with radiation pattern notches or nulls at...
6445357 Method and apparatus for exciting a television antenna using orthogonal modes  
An antenna driving circuit for connecting an antenna to two transmitters is disclosed. The antenna driving circuit includes a hybrid combiner that has two isolated inputs. The hybrid is configured...
6429827 Integrated MMDS antenna with reflector mounted on a totally sealed single-body dipole-transceiver base  
The present invention discloses an integrated single-body antenna-transceiver assembly for a multi-channel multi-point distribution system (MMDS) transceiver for bi-directional signal transmission...
6369771 Low profile dipole antenna for use in wireless communications systems  
A dipole antenna for use with a mobile subscriber unit in a wireless network communications system. The antenna is fabricated with printed circuit board (PCB) photo-etching techniques for precise...
6369770 Closely spaced antenna array  
An antenna array for use with a mobile subscriber unit in a wireless network communications system. The invention utilizes a multiplicity of resonant strips provided within the ground plane. These...
6172652 RF receiving antenna system  
An antenna system is provided for receiving horizontal and vertical components of a transmitted RF signal and for minimizing the magnitude of one of the components prior to application to an RF...
6127986 Integrated down-converter with dipole-antenna implemented with novel mechanical filter structure  
The present invention discloses an integrated dipole antenna and down converter apparatus. The integrated dipole antenna and down converter apparatus includes a dipole antenna for receiving...
6067053 Dual polarized array antenna  
A planar array antenna having radiating elements characterized by dual simultaneous polarization states and having substantially rotationally symmetric radiation patterns. A distribution network,...
6005522 Antenna device with two radiating elements having an adjustable phase difference between the radiating elements  
Antenna devices, including a pair and larger arrays of radiators, wherein each pair is to be connected to a first transmission line having a first characteristic impedance Z1. Each pair includes at...
5982337 Cellular antennas for stratosphere coverage of multi-band annular earth pattern  
Cellular antenna systems are provided for airship-type support at a position in the stratosphere. A single antenna system (20) may provide cellular communication for earth-based users located...
5966102 Dual polarized array antenna with central polarization control  
A planar array antenna having radiating elements characterized by dual simultaneous polarization states and having substantially rotationally symmetric radiation patterns. A distribution network,...
5949383 Compact antenna structures including baluns  
An antenna structure includes a center feed dipole antenna having first and second radiating sections that extend along a substrate from a center feed point. A feed section is electrically coupled...
5790081 Constant impedance matching system  
A feed line is coupled to a driven element of an antenna using capacitive coupling elements, such as coupling rods, coupling wires, or conductive tape. The capacitive coupling elements allow signal...
5589843 Antenna system with tapered aperture antenna and microstrip phase shifting feed network  
An improved antenna system for use at high frequencies such as cellular communication and PCS frequencies, having a steerable, multi co-linear array antenna in which the number of radiating...
5532708 Single compact dual mode antenna  
A printed circuit board antenna is provided which includes an electronic switch (38) whereby a single compact radiating structure consisting of a split dipole antenna (10) with associated balun...
5528252 Dipole television antenna  
A television antenna device comprises a pair of electrically conductive dipole arms, a support attached to the dipole arms for supporting the dipole arms, and an electrical circuit operatively...
5515063 Broadcasting set comprising a rigid-dipole rotary antenna and rotating joint designed for this set  
The disclosure relates to broadcasting by means of rotary antennas using rigid dipoles. Each of two distinct channels passes through the joint between the fixed support of the mobile part of the...
5469181 Variable horizontal beamwidth antenna having hingeable side reflectors  
The invention provides a broadband directional antenna having a central reflector plate, a dipole and at least one side reflector panel. The dipole is arranged on the central reflector plate for...
5274391 Broadband directional antenna having binary feed network with microstrip transmission line  
A broadband antenna array, formed of pairs of horizontally-spaced dipoles that are balun-fed, uses an air dielectric microstrip binary-feed network to optimize antenna bandwidth. Each dipole is fed...
5264862 High-isolation collocated antenna systems  
The need to widely separate antennas (e.g., transmit and receive antennas) for VHF radio and other applications is avoided by high-isolation antenna systems with collocated antennas and...
5216695 Short pulse microwave source with a high prf and low power drain  
This invention describes a high voltage, very short pulse, microwave radiating source using low-cost components, and capable of operating at high pulse repetition frequencies (prf). The source is...
5182570 End fed flat antenna  
A planar dipole antenna is arranged on a non-conductive substrate having an exposed, planar surface. The antenna includes a first quarter wavelength element having a first end and an opposite...
5172128 Antenna with circular polarization, notably for antenna array  
An antenna system capable of both circular and linear polarization. The antenna structure includes a symmetrical stripline 90° hybrid coupler, having first and second output branches. A first and...
5021800 Two terminal antenna for adaptive arrays  
A single two terminal antenna, such as a dipole antenna, is used to supply the input signals for a two element adaptive array. This reduces the number of antennas required by the adaptive array to...
4843401 Method and apparatus for generating and radiating electromagnetic energy  
The invention pertains to a method and apparatus for generating and radiating electromagnetic energy for use in heating the upper atmosphere. For such an application, the cost per watt is a...
4748450 Vehicular multiband antenna feedline coupling device  
A multiband antenna mounting and feedline coupling arrangement includes a first transmission line segment secured in a mounting device for the antenna for coupling energy to and from the antenna. A...
4700196 Highly decoupled cosited antennas  
Two cosited omnidirectional biconical antennas are respectively tilted plus nd minus 45 degrees (±45°) with respect to the vertical and, therefore, are perpendicular (90°) with respect to each...
4593412 Integrated oscillator antenna for low power, low harmonic radiation  
A low-power transmitter for garage door operator systems and the like wherein harmonics of the fundamental frequency are suppressed by class A or AB oscillator operation and fundamental radiation...
3932875 Directional antenna  
A single element directional antenna consisting of a cylindrical element of such a size compared to the wavelength of the received signal that measurable difference on phase are detectable at...
3789412 AIRCRAFT ANTENNA BALANCE TECHNIQUES  
Antenna balance and coupling circuitry for providing rejection of radio fuency signals produced by airframe currents flowing in a vertically polarized dipole antenna installed on an airborne...
Matches 1 - 50 out of 117 1 2 3 >