1. [1] F. Sun, et al.: “Wideband frequency reconfigurable antenna array,” IEICE Electron. Express 15 (2018) 20171210 (DOI: 10.1587/elex.15.20171210).
2. [2] G. Engel, et al.: “RF digital-to-analog converters enable direct synthesis of communications signals,” IEEE Commun. Mag. 50 (2012) 108 (DOI: 10.1109/MCOM.2012.6316784).
3. [3] H. He, et al.: “Wideband MIMO systems: signal design for transmit beampattern synthesis,” IEEE Trans. Signal Process. 59 (2011) 618 (DOI: 10.1109/TSP.2010.2091410).
4. [4] Y. Veyrac, et al.: “A 65-nm CMOS DAC based on a differentiating arbitrary waveform generator architecture for 5G handset transmitter,” IEEE Trans. Circuits Syst. II. Exp. Briefs 63 (2016) 104 (DOI: 10.1109/TCSII.2015.2504947).
5. [5] Z. De-ping, et al.: “An ultra-high ramp rate arbitrary waveform generator for communication and radar applications,” IEICE Electron. Express 12 (2015) 20141163 (DOI: 10.1587/elex.12.20141163).