PT Journal AU Semenov, AD Richter, H Hubers, H Gunther, B Smirnov, A Il'in, KS Siegel, M Karamarkovic, JP TI Terahertz performance of integrated lens antennas with a hot-electron bolometer SO IEEE Trans. Microw. Theory Techn. PY 2007 BP 239 EP 247 VL 55 IS 2 DI 10.1109/TMTT.2006.889153 DE HEB; lens antenna ER