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Waveguide Diplexer Links Point-To-Point Systems, Fig. 7

Waveguide Diplexer Links Point-To-Point Systems, Fig. 8

The experimental diplexer (Fig. 7) was fabricated using the split-block method.13 Its performance was evaluated by means of high-frequency measurements, with the measured results agreeing fairly closely with the simulations (Figs. 8 and 9). The diplexer exhibits a low passband insertion loss of 0.3 dB in band 2 and only 0.5 dB in band 3, compared to simulated insertion-loss values of 0.08 dB for both bands.  The low insertion loss of the simulations is due in part because ideal conductors are assumed, with considerably lower insertion loss than actual conductors. As these results show, this approach helps to simplify the otherwise complicated design of a waveguide diplexer. When more channels are needed, it can also be applied to general junction-type waveguide multiplexers.

Waveguide Diplexer Links Point-To-Point Systems, Fig. 9a

Waveguide Diplexer Links Point-To-Point Systems, Fig. 9b

Waveguide Diplexer Links Point-To-Point Systems, Fig. 9c

Acknowledgments

This work was supported by the National Research Foundation of Korea (KRF) grant funded by the Korean government (MSIP) (No. 2008-0062611).

Seong-Gon Choi, Professor

Department of Radio and Communications Engineering

Jargalsaikhan Nyambayar, Graduate Student

Eun-Jong Cha, Professor

Department of Medicine

Biering-Cheal Ahn, Professor

Department of Radio and Communications Engineering

Jae-Hoon Bang, Research Professor

BK21 Chungbuk Information Technology Center, e-mail: jhbang@cbnu.ac.kr

Chungbuk National University, 12 Gaesin-dong, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, South Korea; +82 43-261-2114

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