Other

Trw Limited

Gary Gwoon Wong

Calvin Wong

Kalem Gwoon Wong

Perry Gwoon Wong

Hyman Gwoon Wong

Kalem Gwoon Wang

This invention discloses a design and implementation of an X-band antenna optimized for a moving vehicle to communicate with a stationary orbit satellite. The new antenna design employs unique circuit boards that contain dipole elements, power dividers, pin diode switches and digital phase shifters. The circuit boards perform together as an array to produce high gain beams. Depending on the antenna performance needs, several antenna boards may be required. The circuit boards' dimensions are all identical containing round disks of equal diameters. The dipole radiating elements are located near the outer edge of the board. They are designed to perform circular type polarization. By increasing the diameter of the board and a number of boards, or a combination of the two, one can achieve any desired beam shape that may be required. The disclosure design approach is unique and flexible; for this reason, an eight circuit board vehicle antenna has been configured. The disclosure antenna body is a cylindrical shaped structure which is having a 4.25 inch in diameter and 8.50 inch in height. This design approach is also applicable to frequencies other than X-band. Outstanding characteristics of the disclosure antenna are high performance, rigid body and low cost.

Vehicle antenna for satellite communication

This invention discloses a design and application of a variable beam antenna optimized for WI-HI application in data, video and voice transmission between various systems with an emphasis on medical monitoring. The subject antenna consists of a unique group of dipole radiators that are excited by zigzag feed lines and perform together as an array. This antenna is unique because it can provide various high gain beams by simply applying electrical shorts at the cross points in the feed lines. The shorts can be created mechanically or electronically. The antenna beam coverage can range from 15&#xb0; to 110&#xb0;wide in H plane and maintains a constant beam width of 60&#xb0; in E plane. The shorts are applied to reduce the antenna effective aperture, thereby increasing the beam width of the antenna. The current that flows to the outer dipoles are cut-off due to the shorts.

High gain variable beam WI-FI antenna

A high performance broadband antenna for backpack and helmet application allowing data, video, and voice transmission between parties. The antenna consists of a pair of triangle shaped elements which are configured to stick on a backpack surface or place over a helmet with a coaxial cable connecting a radiating structure to the communication equipment on the body. A metal shielding performs as a ground plane and also acts as a protectant from radiation hazards to the head or body areas. The antenna is made with materials that conform to the shape of a helmet or stick directly onto a backpack surface. This design can function under multiple frequencies on UHF and S bands; its placement on a helmet receives less Interference from Its surroundings.

Stick-on multi-frequency Wi-Fi backpack and helmet antenna

This invention discloses a design and fabrication of a high performance compact antenna to receive public airwaves HDTV signals. The subject antenna consists of a high efficient cone shape broadband element excited over a small metal ground plane. A reflecting surface is implemented to help rejecting any unwanted multiple reflecting signals from the surrounding objects. Outstanding impedance characteristics and broad pattern coverage have been obtained. The pattern coverage is omnidirectional. The polarization is linear along the cone axis. This antenna design operates well in a weak signal environment and as a result the antenna can receive a large number of public channels. Although the antenna measures only 5&#xbe;&#xd7;5&#xbe;&#xd7;3&#xbc; inches in a cubical enclosure or in a 6&#x215c; inches diameter by 3&#xbd; inches depth cylindrical body, the antenna packaged in either enclosure can receive more public channels than a much larger antenna twice of its size. Two invention antennas have been fabricated and tested and the test results confirmed that all antennas of either enclosure were performing well as expected. The invention antennas receive more than 130 public channels.

High performance (mini-cube) indoor HDTV antenna

This invention discloses a design and fabrication of a high performance HDTV Antenna to receive public airwave signals. The subject antenna consists of a high efficient broadband element and a pair of reflecting surfaces. The reflecting surfaces produce a focusing effect. The backside radiation of the antenna is redirected, making it more energized to receive signals from the front side. This is a very desirable feature in a weak signal environment. The reflecting surfaces provide additional benefits in reducing unwanted multiple reflecting signals which often cause unstable pictures. The broadband radiating element composed a pair of triangular shape radiators which is excited by a new art infinite balun. With this design, it is unnecessary to reposition the antenna in order to receive all available public channels. A fixed location is generally adequate to provide good reception to all stations.

High performance HDTV antenna design and fabrication

Disclosed is an apparatus and method for shaping a beam of radiation from a circularly polarized beam shaping antenna to create a predetermined radiation pattern. A circularly polarized feed horn generates the beam of radiation to be shaped. Circularly polarized radiator elements attached to a ground plane are positioned to receive the beam of radiation. Each radiator element is physically rotated about an axis relative to the ground plane to alter its phase. The radiator elements are then operable to individually radiate a beam of radiation to form a combined radiation beam creating the predetermined radiation pattern.

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Torrance, CA, United States of America

Gary Gwoon Wong