A SAW-less LTE transmitter with high-linearity modulator using BPF-based I/Q summing. - Takahiro Nakamura; Naoki Kitazawa; Kaoru Kohira; Hiroki Ishikuro (ESSCIRC, 2014)

Fence loaded antenna coupler for high-band UWB with steep cutoff characteristics. - Isao Saito; Kaoru Kohira; Hiroki Ishikuro (RWS, 2015)

A 24mW 5.5Gbps dual frequency conversion demodulator for impulse-radio with first sidelobe. - Kaoru Kohira; Naoki Kitazawa; Hiroki Ishikuro (RWS, 2016)

A 12.5Gbps CDR with Differential to Common Converting Edge Detector for the Wired and Wireless Serial Link. - Kaoru Kohira; Hiroki Ishikuro (IEICE Trans. Electron., 2016)

A 24 mW 5.7 Gbps Dual Frequency Conversion Demodulator for Impulse Radio with the First Sidelobe. - Kaoru Kohira; Naoki Kitazawa; Hiroki Ishikuro (IEICE Trans. Electron., 2016)