Wide band receiving antenna of flat digital television
A digital TV receiving and flat technology, applied in antennas, slot antennas, circuits, etc., can solve the problems of high complexity, hardware cost and power consumption, large volume, and occupying three-dimensional space.
Inactive Publication Date: 2011-10-26
LITE ON TECH CORP +1
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Problems solved by technology
In DVB-T technology (such as MOTIVATE Project), in the early stage, in order to improve the mobile reception performance of DVB-T receivers installed on vehicles, technologies such as advanced channel estimation and dual-antenna reception for diversity combining were derived. The price paid is higher complexity, hardware cost and power consumption
The digital TV receiving antenna is the standard equipment of commercially available digital TV tuners. The common digital TV receiving antenna is mostly in the form of a monopole antenna. The disadvantages are that it occupies a three-dimensional space and the bandwidth is insufficient. Still meet broadband operation requirements, will be a key breakthrough
[0003] Taiwan Patent Publication No. 521,455 "Planar Miniaturized Antenna for Digital TV" discloses an example of using a miniaturized antenna to receive digital TV signals. However, although this antenna can receive digital TV systems, its volume is too large, making it Less convenience in practical use
Method used
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Embodiment 1
[0042] image 3 are the return loss experimental measurement results of Embodiment 1 of the antenna of the present invention, the first prior art and the second prior art. This experiment selects the following dimensions to measure: the length of the radiating metal sheet 11 is about 235mm, the width is about 20mm, and the width of the slit is about 1mm; the total length of the slit 14 of embodiment 1 is about 80mm, and one end opening is Near the center point of the first long side 111 of the radiating metal sheet 11, the other end opening 112 is located on the second long side of the radiating metal sheet 112, about 60 mm from the center point; the length of the slit 14 of the prior art 1 The width is the same as that of the radiating metal sheet 11, so it is about 20 mm. One end opening is located near the center point of the first long side 111 of the radiating metal sheet 11, and the other end opening 112 is located near the center point of the radiating metal sheet 11; ...
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The present invention relates to a receiving antenna for a broad band flat digital TV, which comprises a dielectric substrate, a radioactive metal sheet, a slot, two feed-in points and a coaxial feed-in transmission line. Wherein, the radioactive metal sheet is formed on the dielectric substrate, takes a shape of strip and is provided with a first long edge and a second long edge. The slot is provided with two end openings, of which one end opening is positioned nearby a central point of the first long edge on the radioactive metal sheet and the other end opening is arranged on the second long edge of the radioactive metal sheet. The radioactive metal sheet is divided into a first metal sheet and a second metal sheet by the slot. Two feed-in points are respectively positioned on the firstand the second metal sheet with the slot as a partition. The antenna can generate a practical broad band-based bandwidth covering operation demands of digital TV channels (470 -806MHz).
Description
technical field [0001] The present invention relates to a digital TV receiving antenna, in particular to a broadband flat digital TV receiving antenna. Background technique [0002] In the past, TV programs were transmitted by analog signals through high-frequency radio waves (UHF and VHF) to the receiving end, and then the images and sounds were presented through analog TV. Picture clarity, anti-noise, and ghosting are not good, and occupy a certain bandwidth, making bandwidth usage inefficient; in contrast, digital broadcasting can be compressed before transmission, which greatly improves bandwidth usage efficiency, and At the receiving end, debugging and correction functions can be performed for signal attenuation during transmission, so that digital broadcasting has higher video and audio quality, and the number of channels is greatly increased. Therefore, digitalization of TV broadcasting related technologies is an inevitable trend. At present, there are three main sta...
Claims
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IPC IPC(8): H01Q1/38H01Q13/08H01Q13/10
Inventor 翁金辂郗韵文苏绍文
Owner LITE ON TECH CORP