Three units 9DB simple copper wire antenna ----- Simple Antenna

Three single 9DB simple copper wire antenna, Simple Antenna Keywords: 9DB antenna The wire diameter is about 1.2mm, the bottom is connected to the RP-SMA head. The bottom is the length of the original design. I don't remember. This time I do now is 78mm, not necessarily the best length, everyone can test more. The spiral portion can be found in a fine screw, note that it is a six-turn, stretched at a length of 21.5 mm, and the diameter of the circle is about 5 mm to 6 mm. Previously similar multi-copper wire antennas, this effect is best, and it is not a number of effects from the original 9DBI export product I bought. Netizens say that this antenna is superimposed vertical vibrator, straight part of the partial emission, the spiral portion inverted, the radiation elevation angle is small, and the gain is generated. I understand this, the signal strength is determined by the transmit power, and this antenna is only pressed, and the effect of increasing the emission distance is achieved. So do antenna to choose according to your own actual situation, not a high gain antenna will be more suitable for you more than the low gain antenna. In actual use, the high-gain full-to-directional antenna will be small due to the low angle, and the effect is not as low as low-gain, and the high gain antenna can display its performance in a long distance.

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