D.-H. Kim, J. Hirokawa, K. Tekkouk, M. Ando, R. Sauleau. Comparison between one-body 2-D beam-switching Butler matrix and 2-D beam-switching Rotman lens.
21st International Symposium on Antennas and Propagation, ISAP 2016, Oct 2016, MashikiGinowan, Japan. pp.300--301.
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