Conclusion: Generally, the LAA can be regarded as the FIR filter of DSP with respect of its phase. And ULAA is just the FIR filter with RWF. To have the better performance, square linear-phase design method for FIR filter can be directly employed for the LAA design.
References
1. COLLIN, R. E.:’ Antennas and Radiowave Propagation’. (McGraw-Hill, 1985)
2. OPPENHEIM, A. v., and SCHAFER. R.W.: ’Digital signal processing’ (Prentice-Hall, New Jersey, 1975)
3. MATLAB R2018 User Manual