Loading patent…
OwnerGary Gwoon Wong, Calvin Gwoon Wong +1inventors
InventorsGary Gwoon Wong, Calvin Gwoon Wong, Kalem Gwoon Wang
Estimating the term…
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 5¾×5¾×3¼ inches in a cubical enclosure or in a 6⅜ inches diameter by 3½ 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.
A new design and fabrication of a high performance compact antenna to receive public airwaves or HDTV signals is disclosed. The invention antenna is composed of a high efficient cone shape broadband element excited over a small metal ground plane via an F connector directly attached from the back side of the small ground plane through the enclosure surface. The design provides extremely broad performance in pattern and impedance. The antenna impedance measurement results show an impedance bandwidth of 10:1 with a return loss greater than 15 db. The antenna size is only 5½×5½×3 inches. The cone angle can be varied from 90 degree to angle smaller or little larger. However, any angle employed differ from 90 degree will alter the physical dimensions of the cone element and its enclosure dimensions. The cone shape radiating element performs equally well in its cubical or cylindrical enclosure. Metal surfaces are used in the antenna enclosure design to help shaping the antenna radiating coverage to minimize reflection effects from surrounding objects.
Dependencies are inferred from the claim text.