here are two noticeable problems in the high-building indoor signal distribution scenarios.

Firstly, in the high-rise residential scene, due to the narrow width and low gain of the vertical beam of the large-angle spotlight antenna using in the current network, the coverage of the low floor and it’s deep is poor. The traditional coverage scheme uses two spotlight antennas to cover the upper and the low floors in floors. After the signals are reflected between the buildings, the indoor signal sources are very messy, and receivers can receive many messy signals from multiple base stations, which lead to the poor low signals quality and affect the project delivery.

Secondly, high buildings have narrow cross-section, the 3dB HBW of the spotlight antenna is larger than 30 degrees, and the building is difficult to shield the leakage from the electromagnetic field of the antenna, therefore, it will cause the signal leakage to interfere with other signal stations or interfere with the signal of the road.

Two appearances of product are available according to the requirement of the scenes:

The advantages of building antenna’s application 

1.Compared with the spotlight antenna, the gain is higher than 3dB and the vertical beamwidth of 3 dB can reach  60 degrees in  Sigtenna’s antenna , which  can cover about 35 floors at a height of 125 meters. Especially, it can be effectively solve the original problem of the insufficient coverage and week coverage of 1-5 floors at the bottom of the building ; The average RSRP is increased by more than 8dB and the average SINR is increased by more than 3dB in the application measurement of 33 floors, and the improvement effect is obvious.

Below is a site comparison test between a normal spotlight antenna and Sigtenna’s building antenna:

2, it is more flexible in the installation and coverage of the antenna in the target area, and the ±30 pitch angle can be adjusted in the vertical direction. The antenna can be installed on the roof to cover the opposite floor from the top down, and can also be installed on the bottom wall to cover the opposite floor from the bottom to the top, which provides the convenience of the installation environment. At the same time, when the installation position is offset from the covered floor, the offset floor can be covered by adjusting the horizontal azimuth angle (as shown below).

Adjustable ±30°angle of pitch

3,In order to meet the different widths of cross section floor coverage and avoid interference with other floors by less leaking signal, Sigtenna developed a product to be able to adjust the horizontal beamwidth according to the floor cross-section to be used in a variety of scenes.

Horizontal beamwidth with  12°    17°    22°

Conclusion: In practical applications of the new building antenna, the total cost is lower than that the traditional spotlight antenna because of its increase in gain and the flexibility of installation and selection, but improvement in the coverage of high-rise buildings and the improvement of the quality of the entire community network are very obvious.