Open sleeve antenna
A sleeve antenna, open technology, applied in the field of open sleeve antenna, can solve the problems of inconvenient use, narrow bandwidth of hand-held antenna, etc., and achieve the effect of wide bandwidth, good antenna performance, and easy processing and realization
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[0020] An open sleeve antenna such as figure 1 and 2 As shown, it consists of antenna vibrator 1, insulating medium 2, metal sleeve 3, lumped parameter inductance 4, metal grounding box 5 and SMA connector 6.
[0021] The antenna vibrator 1 is a columnar metal rod. In a preferred example of the present invention, the antenna element 1 is made of copper metal. The antenna element 1 can be a standard cylindrical shape with the same upper and lower radii. However, in order to obtain a good match for the impedance of the antenna itself, in the preferred embodiment of the present invention, the antenna vibrator 1 is in the shape of a tapered stepped column, that is, along the axis direction of the antenna vibrator 1, the radius of the antenna vibrator 1 is segmented and gradually changed. Each segment has a different radius and length. The radius of the end of the antenna element 1 close to the metal ground box 5 is smaller than the radius of the end of the antenna element 1 aw...
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