Summary

Elevation showed wire LQI better than planar. Although wire is worse on the road, Planar is worse in 45° direction.

Motive

Which is suitable wire or planar antenna of TWE (Tocos Wireless Engine) to propagate distance?

要約

電波強度 LQI を測定した結果,高さの影響はワイヤの方がが少ない。道路上試験ではワイヤが良くないように見えるが,対角線上の距離だと平面はワイヤより劣る。

経緯目的

TWE (Tocos Wireless Engine) のワイヤアンテナと平面のどちらが通信距離が期待できるか。


TWE range ability test

RangeG
Photo10 Ground zero
Range0m
Photo11 Ground 1.8m
Range17m
Photo12 Distance 17m
Range43m
Photo13 Distance 43m
Table 4 LQI values 2017-07-06
Distance0m17m43m67m0m Ground
Wire #49651NG12132
Planar #5844821NG54

I installed wire antenna type device #4 and planer antenna type device #5 on the bicycle at the height of 1.8 m. I measured LQI value with regard to distance as shown in Photo 10 to 13. I checked the distance by Google Map.

The street is corner at 67 m distance. #4 may have no sensing range between 17m and 67m. When their devices is on ground zero, #4 LQI increases. But #5 decreases. It seems that planar antenna is not good as wire antenna with regard to elevation.

When they put on the north east corner of the backyard, #4 and #5 LQI value are 36 and varying 12 to 18. We should choice wire type for usual application.

 

Biwa Lake JAPAN   © Enoki 2017 November 05