PIER Letters
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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By P. Zhang, X. Chen, and J. Ma

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This paper presents a low-cost strip-to-bilateral-slotline transition with operating bandwidth from 0.53 to 6 GHz. The low-cost design concept is realized by utilizing conventional cheap FR-4 substrate and wide slotline with large slot width. By virtue of the low price of FR-4, less strict fabrication tolerance of wide slotline and the avoidance of metallic vias, the fabrication cost is reduced significantly compared to schemes using expensive Rogers RT laminates, extremely narrow slotline with strict fabrication tolerance and metallic vias. The broadband impedance matching difficulty caused by the high characteristic impedance of wide slotline is solved by three means. Firstly, bilateral structure is used to lower the characteristic impedance of the slotline. Then an elliptic slotline stub and an innovative half-elliptic strip stub are proposed to provide good impedance matching. Finally, multi-section stepped impedance transformers are used to match the transition from high impedance to standard 50 Ohm. The validity of the design methods is verified through experiments.

P. Zhang, X. Chen, and J. Ma, "Low Cost Strip-to-Bilateral-Slotline Transition on Wide Slotline," Progress In Electromagnetics Research Letters, Vol. 46, 67-72, 2014.

1. Lin, F., Y. Qi, and Y. C. Jiao, "A 0.7-20-GHz strip-fed bilateral tapered slot antenna with low cross polarization," IEEE Antennas and Wireless Propagation Letters, Vol. 12, No. 1, 737-740, June 2013.

2. Lin, F., Y. C. Jiao, and Y. Qi, "A wideband microstrip to bilateral slotline transition using constant impedance bilateral slotline and heart-shaped irregular cavity," IEEE Microwave and Components Letters, Vol. 23, No. 5, 255-257, April 2013.

3. Wang, N.-B., Y.-C. Jiao, Y. Song, L. Zhang, and F.-S. Zhang, "A microstrip-fed logarithmically tapered slot antenna for wideband applications," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 10, 1335-1344, 2009.

4. Wang, N.-B., Y. Song, Y.-C. Jiao, L. Zhang, and F.-S. Zhang, "Extreme wideband tapered slot antenna with impedance bandwidth in excess of 21.6 : 1," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 231-238, 2009.

5. Xu, H.-Y., H. Zhang, J. Wang, and L.-X. Ma, "A new tapered slot antenna with symmetrical and stable radiation pattern," Progress In Electromagnetics Research Letters, Vol. 5, 35-43, 2008.

6. Yang, Y., Y. Wang, and A. E. Fathy, "Design of compact Vivaldi antenna arrays for UWB see through wall applications," Progress In Electromagnetics Research, Vol. 82, 401-418, 2008.

7. Ramakrishna, J., "Even-mode characteristics of the bilateral slotline," IEEE Transaction on Microwave Theory and Techniques, Vol. 38, No. 6, 760-765, June 1990.

8. Lin, F., Y. C. Jiao, and Z. Zhang, "Strip-fed tapered slot antenna with enhanced impedance bandwidth from 0.57-35 GHz," IET Electronics Letters, Vol. 49, No. 17, 1057-1058, August 2013.

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