Evaluation on Pseudo-Doppler Antenna Array Using Software-Defined-Radio

We investigated the effects of adjacent monopole spacing of pseudo-doppler antenna arrays (PDAAs) on detecting the angle-of-arrival (AoA) in both indoor and outdoor environments above 2 GHz. A software-defined-radio technology was adopted to realize the capability of PDAA. Among three adjacent monopole spacing (0.1414λ, 0.2λ, and 0.25λ, where λ is the wavelength of the frequency), the adjacent monopole spacing of 0.2λ showed the lowest angle difference between desired and actual angle in both environments above 2 GHz.