1. A monopole slot antenna for multiple input and multiple output comprising:
a substrate including a first surface and a second surface corresponding to each other;
an antenna module disposed on said first surface of said substrate; said antenna module including a first antenna and a second antenna disposed separately and symmetrically with each other; a first inner monopole slot and a first outer monopole slot being disposed on said first antenna; said first inner monopole slot being formed by connecting a first straight section with a plurality of first bended sections; said first outer monopole slot being defined as a linear slot for surrounding an outer periphery of said first inner monopole slot; a second inner monopole slot and a second outer monopole slot being disposed on said second antenna; said second inner monopole slot being formed by connecting a second straight section with a plurality of second bended sections; said second outer monopole slot being defined as a linear slot for surrounding an outer periphery of said second inner monopole slot;
an isolation unit disposed on said first surface of said substrate; said isolation unit being located between said first antenna and said second antenna; said isolation unit including a third straight section which is connected to a third bended section; and
two feeding units respectively disposed on said second surface of said substrate; said two feeding unit being respectively disposed corresponding to said first antenna and said second antenna.
2. The monopole slot antenna for multiple input and multiple output as claimed in claim 1, wherein, said first straight section is extended from a side of said substrate and connected to four first bended sections correspondingly bended as a continuous U-shaped contour; said first outer monopole slot is defined L-shaped; said second straight section is extended from the other side of said substrate and connected to four second bended sections correspondingly bended as a continuous U-shaped contour; said second outer monopole slot is defined L-shaped.
3. The monopole slot antenna for multiple input and multiple output as claimed in claim 1, wherein, said feeding unit is defined as a micro-strip.
4. The monopole slot antenna for multiple input and multiple output as claimed in claim 1, wherein, said third bended section is defined I-shaped.
5. The monopole slot antenna for multiple input and multiple output as claimed in claim 1, wherein, a length of said substrate is 50 mm and a width of said substrate is 20 mm.
6. The monopole slot antenna for multiple input and multiple output as claimed in claim 1, wherein, a length of said antenna module is 10.5 mm and a width of said antenna module is 20 mm.
7. The monopole slot antenna for multiple input and multiple output as claimed in claim 5, wherein, a length of said antenna module is 10.5 mm and a width of said antenna module is 20 mm.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A bit for removing damaged screws comprising: a shaft portion and a head portion connected to the shaft portion, the head portion including a middle axis and being provided with a tip section and a threaded conical section connected between the tip section and shaft portion, the tip section including a vertex point, an outer peripheral surface of the threaded conical section defining an angle with respect to the middle axis, the threaded conical section expanding toward the shaft portion, and being a conical structure with a reverse thread, the bit being characterized in that;
the head portion is provided with two symmetrical scraping portions extending continuously from the tip section to the threaded conical section, the two scraping portions each include a first scraping surface, a residual portion and a second scraping surface, the residual portion is a structure formed at a connection where the first and second scraping surfaces are connected to each other at an angle, the first scraping surface intersects with the tip section, the threaded conical section and a first connecting surface of the residual portion, a first scraping edge is formed at a position where the first scraping surface intersects the tip section, and extends between the vertex point and the threaded conical section, the second scraping surface intersects with the tip section, the threaded conical section and a second connecting surface of the residual portion, a second scraping edge is formed at a position where the second scraping surface intersects the tip section, and extends between the vertex point and the threaded conical section.
2. The bit for removing damaged screws as claimed in claim 1, wherein the threaded conical section of the head portion is further provided with a shrinking neck section which is connected to the scraping portions, and the diameter at both ends of the shrinking neck section is smaller than a diameter of the connection between the threaded conical section and the shrinking neck section.