Wireless signal transmission device and signal receiver with a wave guide including a medium sheet with first and second sections having different dielectric constants
A wireless signal transmission device is provided. The wireless signal transmission device includes a reflective surface and a receiver. The reflective surface reflects a wireless signal. The receiver receives the wireless signal reflected. The receiver includes a receiver body, a wave guide, a transmission unit and a medium sheet. The wave guide includes an opening end and a connection end connected thereto. The transmission unit is disposed in the wave guide adjacent to the connection end for receiving the wireless signal. The medium sheet is disposed in the wave guide, wherein the medium sheet comprises a first section and a second section, the first section is adjacent to the transmission unit, the second section is adjacent to the opening end, the first section has a first dielectric constant, the second section has a second dielectric constant, and the first dielectric constant is smaller than the second dielectric constant.
1. A wireless signal transmission device, comprising:
a reflective surface, reflecting a wireless signal; and
a receiver, receiving the wireless signal reflected from the reflective surface, comprising:
a receiver body;
a wave guide, comprising an opening end and a connection end, wherein the connection end is connected to the receiver body;
a transmission unit, disposed in the wave guide adjacent to the connection end, wherein the transmission unit receives the wireless signal; and
a medium sheet, disposed in the wave guide, wherein the medium sheet comprises a first section and a second section, the first section is adjacent to the transmission unit, the second section is adjacent to the opening end, the first section has a first dielectric constant, the second section has a second dielectric constant, and the first dielectric constant is smaller than the second dielectric constant, wherein the first section has only one dielectric constant, wherein the first section comprises polypropylene (PP), and the second section comprises Acrylonitrile-Butadiene-Styrene (ABS) and PP.
2. The wireless signal transmission device as claimed in claim 1 , wherein the transmission unit comprises a transmission pin, an included angle is formed between the medium sheet and the transmission pin, and the included angle is 45°.
3. The wireless signal transmission device as claimed in claim 1 , wherein a ratio of a length the first section to a length of the second section is between 1:0.8 and 1:1.
4. The wireless signal transmission device as claimed in claim 1 , wherein the medium sheet comprises a first end and a second end, the first end is toward the transmission unit, the second end is toward the opening end of the wave guide, a first distance is formed between the first end and the transmission unit, and a second distance is formed between the second end and the opening end of the wave guide.
5. The wireless signal transmission device as claimed in claim 4 , wherein the first distance is within a range of 6.5 mm-6.9 mm, and the second distance is within a range of 9.5 mm-9.8mm.
6. The wireless signal transmission device as claimed in claim 4 , wherein a first notch is formed on the first end, and a second notch is formed on the second end.
7. The wireless signal transmission device as claimed in claim 1 , wherein the wave guide comprises a groove, and the medium sheet is slid in the groove to be inserted into the wave guide.
8. The wireless signal transmission device as claimed in claim 1 , wherein the wireless signal is a circular polarized signal.
9. A receiver, comprising:
a receiver body;
a wave guide, comprising an opening end and a connection end, wherein the connection end is connected to the receiver body;
a transmission unit, disposed in the wave guide adjacent to the connection end; and
a medium sheet, disposed in the wave guide, wherein the medium sheet comprises a first section and a second section, the first section is adjacent to the transmission unit, the second section is adjacent to the opening end, the first section has a first dielectric constant, the second section has a second dielectric constant, and the first dielectric constant is smaller than the second dielectric constant, wherein the first section has only one dielectric constant, wherein the first section comprises polypropylene (PP), and the second section comprises Acrylonitrile-Butadiene-Styrene (ABS) and PP.
10. The receiver as claimed in claim 9 , wherein the transmission unit comprises a transmission pin, an included angle is formed between the medium sheet and the transmission pin, and the included angle is 45°.
11. The receiver as claimed in claim 9 , wherein a ratio of a length the first section to a length of the second section is between 1:0.8 and 1:1.
12. The receiver as claimed in claim 9 , wherein the medium sheet comprises a first end and a second end, the first end is toward the transmission unit, the second end is toward the opening end of the wave guide, a first distance is formed between the first end and the transmission unit, and a second distance is formed between the second end and the opening end of the wave guide.
13. The receiver as claimed in claim 12 , wherein the first distance is within a range of 6.5 mm-6.9 mm, and the second distance is within a range of 9.5 mm-9.8 mm.
14. The receiver as claimed in claim 12 , wherein a first notch is formed on the first end, and a second notch is formed on the second end.
15. The receiver as claimed in claim 9 , wherein the wave guide comprises a groove, and the medium sheet is slid in the groove to be inserted into the wave guide.