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Direct machined broadband corrugated horn array for millimeter observations
• Observation for B-mode polarization of CMB • Simple plane corrugation design without ring
roaded structure • Horn was made of aluminum bulk at NAOJ
machine-shop. • Height : ~14.6 mm • Design frequency : 120 – 270 GHz
Horn simulation
120 GHz 180 GHz
240 GHz 270 GHz 210 GHz
150 GHz
• 120 – 270 GHz horn • Simulation using HFSS and CST software • Symmetric co-polarization • Low cross-polarization • Low return loss
80 – 180 GHz horn array • Scaling of 120 – 270 GHz horn • Good beam shape and return loss
120 – 270 GHz horn • Beam pattern and return loss have been
measured at room temperature. • Measurement results are consistent with
the simulation one.
Horn array MKID camera • Horn array camera connected horn array with broadband
planar OMT on SOI wafer is developed. (S. Shibo+ poster No. G2.18 ) • Multicolor band : 90 GHz , 150 GHz • The unnecessary part was caved to reduce the standing
wave and the weight.
• Horn array camera modules for LiteBIRD is also designed. (Y. Sekimoto+ poster No. G4.19, T. Matsumura+ Session5. on Thursday 23 )