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- W3128309025 abstract "In future wireless communication networks at terahertz frequencies, the directivity and the beam profile of the emitters are highly relevant since no additional beam forming optics can be placed in free-space between the emitter and receiver. We investigated the radiation pattern and the polarization of broadband continuous-wave (cw) terahertz emitters experimentally and by numerical simulations between 100 GHz and 500 GHz. The emitters are indium phosphide (InP) photodiodes with attached planar antenna, mounted on a hyper-hemispherical silicon lens and integrated into a fiber-pigtailed module. As both packaging and material of the emitter was identical for all devices, similarities and differences can be directly linked to the antenna structure. We found that the feeding point structure that connects photodiode and antenna has a large influence on the radiation pattern. By optimizing the feeding point, we could reduce side lobes from −2 dB to −13 dB and narrow the 6dB beam angle from ±14° to ±9° at 300 GHz." @default.
- W3128309025 created "2021-02-15" @default.
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- W3128309025 date "2021-03-02" @default.
- W3128309025 modified "2023-09-24" @default.
- W3128309025 title "Radiation pattern of planar optoelectronic antennas for broadband continuous-wave terahertz emission" @default.
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- W3128309025 doi "https://doi.org/10.1364/oe.416844" @default.
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