Bandwidth Extension of Planar Microstrip-to-Waveguide Transition by Controlling Transmission Modes Through Via-Hole Positioning in Millimeter-Wave Band by Nguyen Thanh Tuan, Kunio Sakakibara, Nobuyoshi Kikuma

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Broadband Waveguide-to-Differential-Line Transition in Multi-Layer Substrates With Triple Stacked Patch in 300 GHz Band by Chatchai Chokchai, Yoshiki Sugimoto, Kunio Sakakibara, Henry Abu Diawuo, Nobuyoshi Kikuma

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Millimeter-Wave Butler Matrix Beamforming Circuit Using Finline in Double-Layer Dielectric Substrate by Nguyen Thanh Tuan, Kunio Sakakibara, Kojiro Iwasa, Takeshi Okunaga, Nobuyoshi Kikuma, Yoshiki Sugimoto

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2 × 2 Lens array antenna using square-bottom concave-convex lens in 300-GHz band. by Baharom, Bazilah, Sugimoto, Yoshiki, Bakar, Rohani, Kunio, Sakakibara, Nobuyoshi, Kikuma, Abd. Rahman, Nurul Huda

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Reduction of Surface Reflection on Dielectric Lens Antenna by Matching Periodic Square-Pillars in 300-GHz Band by Bazilah Baharom, Ryota Ishihara, Yoshiki Sugimoto, Kunio Sakakibara, Nobuyoshi Kikuma, Takayuki Arai, Takayoshi Suganuma, Tomohiro Saito

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2 × 2 Lens Array Antenna Using Square-Bottom Concave-Convex Lens in 300-GHz Band by Bazilah Baharom, Yoshiki Sugimoto, Bakar Rohani, Kunio Sakakibara, Nobuyoshi Kikuma, Yoshihide Yamada, Nurul Huda Abd Rahman

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