60GHz帯におけるマイクロストリップ線路とLCP基 …

1 60 GHz LCP .. 1 1. 2 2 3. 4 4. A 60 GHz Mode Transition between Microstrip Line and Flexible Post -Wall Waveguide on Liquid Crystal Polymer Substrate J. Hirokawa, M. Ando, Y. Uemichi, R. Hosono, N. Guan, M. Okamoto, and A. Itabashi Gbps 60 GHz .. LCP . 60 GHz 0 . 09 dB/mm, dB . Wireless devices operating at 60 GHz band are becoming more and more important these days because high - speed communications exceeding a few Gbps are becoming available. As an elemental technology for 60 GHz - wireless devices, we realized a transformer between microstrip line and post - wall waveguide on a LCP substrate . Transmission loss of the post - wall waveguide and the loss associated with the mode transition are dB/mm and dB at 60 GHz, respectively.

2 1 2 . Gbps . 60 GHz . PWW Post - wall waveguide . 59 GHz 66 GHz 7 GHz . 1 2 3 . RF . IC . 1 TE . IC 2 TE. RF RF .. LCP .. IC PWW . RF . 1 . 2 1 IC . 3 Fig. 1. Conceptual sketch of the connection between 4 communication IC and antenna. 1. 2013 Vol. 2 125 .. LCP Liquid Crystal Polymer . PWW Post - Wall Waveguide . De - embedding De - embedding DUT .. TE 10 TE 20 . 44 . 4 GHz 88 . 8 GHz . PWW mm .. 100 m 200 m . 100 m PWW .. PWW .. LCP . 2 LCP . 3 . X PWW . 4 . GND . PWW . PWW .. 50 .. GSG pad .. GND .. 2 / PWW GSG GND Signal GND . Fig. 2. Proposed MSL / PWW transformer.. 4 . mm . GND . GSG pad .. PWW.. TE .. 3 X 4 . Fig. 3. X - ray image of fabricated transformer. Fig. 4. Sketch of mode - transition principle. 2. 60 GHz LCP . 60 GHz S 21 2.

3 6 dB . PWW . TE PWW-TEG . 8 S 21 S 21 S 11 <. 100 m 20 dB . PWW . 5 6 60 GHz . 0 . 09 dB/mm . 9 . 3 . 6 . 4 mm, 12 . 8 mm TEG . 5 8 . 8 mm PWW - TEG TEG Test Element Group PWW - TEG . 0 . 13 dB/mm 10 6 . 4 mm . GSG S 21 De - 8 . 8 mm, . 0 . 85 mm . 0. Agilent N 5247 A . 6 8 . 8 mm PWW - TEG S11 dB. 10. dB.. 20. S21.. 15 dB 5 . 6 GHz 30 Measurement Simulation 7 8 . 8 mm PWW - TEG S 21 . 40.. 40 45 50 55 60 65. Frequency GHz . 7 S21 . Fig. 7. Measured and simulated results of S21 . PWW. LCP 0. 100 m Linearly-approximated line S21 LCP 2.. dB. 220 m LCP. S21. 4. Post MSL-PWW. Transformer 6. 5 PWW - TEG . Fig. 5. Cross - sectional sketch of PWW - TEG. 0 10 20 30 40 50 60. Waveguide length L mm . 8 S21 . 0 Fig. 8. Relationship between measured S21 and waveguide length.

4 10. GHz . dB. 20. L mm . S11. Pad 30 Measurement Simulation 2L mm . 40. 40 45 50 55 60 65. Frequency GHz . 9 . 6 S11 TEG . Fig. 6. Measured and simulated results of S11 . Fig. 9. Sketch of the proposed millimeter - wave module. 3. 2013 Vol. 2 125 . 4. Length mm 8. dB.. dB. 12. S21. S21. dB Measurement 16. de-embedded Simulation raw data 20. 40 45 50 55 60 65. 0 10 20 30 40 50 60. Frequency GHz . Frequency GHz . 12 PWW-TEG S21 . 10 TEG S21 Fig. 12. Measured S21 on bending - effect. De - embedding . Fig. 10. Comparison of S21 for de - embedded and raw data. PWW . 1 1 2 .. PWW .. 100 m . 50 . PWW . 0 . 6 dB 0 . 09 dB/mm . 11 . Fig. 11. Measurement setup for bended PWW. 1 R. Suga, et al., Lateral radiation millimeter-wave antenna package using post-wall waveguide, IEEE Int.

5 Symp. on embedding 60 GHz Antenna Propagat ., Session 311, June 2009. 0 . 4 dB 2 T. Kai, et al., A coaxial line to post-wall waveguide tran- 2 De - embedding sition for a cost-effective transformer between a RF-de- S 11 < 25 dB vice and a planar slot-array antenna in 60-GHz band, . IEICE Trans. COMMUN ., E98-B, , pp. 1646-1653, May 0 . 6 dB 2006. PWW - TEG 3 R. Suga, et al., Cost-effective 60-GHz antenna-package 11 with end-fire radiation from open-ended post-wall wave- PWW - TEG 3 cm guide for wireless file-transfer system, 2010 IEEE MTT-S. 5 mm 12 3 cm PWW - TEG Int. Microwave Symp. Dig ., vol. 58, pp. 3989-3994, Dec. 2010. 4 M. Swaminathan, et al.,: Polymers for RF apps, IEEE. PWW Microwave Magazine , vol. 12, no. 7, pp. 62-77, Dec.

6 2011. 5 C - 2 - 61 March 2013 . 60 GHz LCP .. 4 . 6 Y. Uemichi, et al., A millimeter-wave transformer be- tween microstrip line and fexible post-wall waveguide on LCP 2013 IEEE MTT-S Int. liquid crystal polymer substrates, . PWW Microwave Symp TH3E - 1 June 2013. 4.