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Applying angular diversity in wireless sensor network provides significant impact by providing more reliable wireless connection and larger margin for link budget. Spatial, polar, and angular diversity techniques are applied to achieve diversity benefits. However, not all diversity schemes are suitable for WSN, especially for those devices that are constrained to be compact. The proposed angular diversity not only creates sufficient high diversity order but also can be retrofit to small sensor nodes. Comparisons are obtained by measurements in realistic, indoor environments. The proposed angular diversity is shown to provide high diversity gain for WSN with slightly increase of the form factor of the sensor nodes.