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Novel rat-race coupler design of arbitrary coupling coefficient using substrate integrated waveguide cavity

Published online by Cambridge University Press:  21 May 2018

Min-Hua Ho ,
Yi-Hao Hong  and
Jen-Chih Li
Min-Hua Ho*
Affiliation:
Graduate Institute of Communications Engineering, National Changhua University of Education, #2, Shihda Road, Changhua City 50074, Taiwan
Yi-Hao Hong
Affiliation:
Wistron NeWeb Corp., #20 Park Avenue II, Hsinchu Science Park, Hsinchu 30844, Taiwan
Jen-Chih Li
Affiliation:
Quanta Computer Inc., #211, Wenhua II Road, Guishan, Taoyuan City 33377, Taiwan
*
Author for correspondence: Min-Hua Ho, E-mail: ho@cc.ncue.edu.tw
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Abstract

The contribution of this paper is to propose a novel rat-race hybrid coupler of arbitrary coupling coefficient. Traditionally, the rat-race hybrid couplers are built by various loop-alike transmission-lines of multiple quarter-wavelength, and in this paper, we approach the coupler design by using a circular substrate integrated waveguide (SIW) cavity (SIWC). The employed SIWC supports two mutually orthogonal degenerate modes, and cavity field is formed by the two modes in an arbitrary weighting ratio which defines the proposed rat-race coupler's coupling coefficient. The cavity is excited by a microstrip combined coupling slot with the microstrip along a specifically chosen direction. The energy of each degenerate mode can be solely extracted by an associated subminiature version A (SMA) whose position is carefully determined. The isolation between the coupling slots is assured by their perpendicular layout, and the isolation between the SMA probes is obtained by the orthogonality of the two degenerate modes. Experiments are conducted on the 3- and 10-dB coupling coefficient samples to verify this novel rat-race coupler design. The measurements agree well with the simulations, and circuit's good performance is observed in terms of coupling precision, isolations, and small phase imbalances.

Keywords

Passive components and circuitsRF front-endssubstrate integrated waveguide cavity
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 8 , October 2018 , pp. 861 - 869
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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References

1.Collin, RE (1966) Foundations for Microwave Engineering. NY: McGraw-Hill.Google Scholar
2.Pozar, DM (1990) Microwave Engineering. NY: Addison-Wesley.Google Scholar
3.Chang, K (1996) Microwave Ring Circuits and Antennas. NY: John Wiley & Sons.Google Scholar
4.Reed, J and Wheeler, GJ (1956) A method of analysis of symmetrical four-port networks. IRE Transactions on Microwave Theory and Techniques MTT-4(10), 246–252.Google Scholar
5.Pon, CY (1961) Hybrid-ring directional couplers for arbitrary coupling coefficient. IRE Transactions on Microwave Theory and Techniques MTT-9 (11), 529–535.Google Scholar
6.Wilkinson, E (1960) An N-way hybrid power divider. IRE Transactions on Microwave Theory and Techniques MTT-8(1), 116–118.Google Scholar
7.Rehnmark, S (1960) Wide-band balanced line microwave hybrid. IEEE Transactions on Microwave Theory and Techniques MTT-25(10), 825–830.Google Scholar
8.March, S (1968) A wideband stripline hybrid ring. IEEE Transactions on Microwave Theory and Techniques MTT-16(6), 361–369.Google Scholar
9.Chu, LW (1971) New broad-band matched hybrids for microwave integrated circuits. Proceedings of the 2nd European Microwave Conference, Stockholm, Sweden, pp. C4/5:1–C4/5:4.Google Scholar
10.Ho, C, Fan, L and Chang, K (1993) Broad-band uniplanar hybrid-ring and branch-line couplers. IEEE Transactions on Microwave Theory and Techniques 41(12), 2116–2125.Google Scholar
11.Ho, C, Fan, L and Chang, K (1994) New uniplanar coplanar waveguide hybrid-ring couplers and magic-Ts. IEEE Transactions on Microwave Theory and Techniques 42(12), 2440–2448.Google Scholar
12.Ho, M-H (2005) Wide-band magic-T coupler using an asymmetric coplanar stripline or coplanar waveguide ring structure. Microwave and Optical Technology Letters 47(4), 327–330.Google Scholar
13.Kuo, J-T, Wu, J-S and Chiou, Y-C (2007) Miniaturized rat race coupler with suppression of spurious passband. IEEE Microwave and Wireless Components Letters 17(1), 46–48.Google Scholar
14.Tseng, C-H and Chen, H-J (2008) Compact rat-race coupler using shunt-stub-based artificial transmission lines. IEEE Microwave and Wireless Components Letters 18(11), 734–736.Google Scholar
15.Eccleston, KW and Ong, SHM (2003) Compact Planar microstripline branch-line and rat-race couplers. IEEE Transactions on Microwave Theory and Techniques 51(10), 2119–2125.Google Scholar
16.Chung, M-L (2005) Miniaturized ring coupler of arbitrary reduced size. IEEE Microwave and Wireless Components Letters 15(1), 16–18.Google Scholar
17.Ahn, H-R and Tentzeris, MM (2017) A novel wideband compact Microstrip coupled-line ring hybrid for arbitrary high power-division ratios. IEEE Transactions on Microwave Theory and Techniques 64(6), 630–634.Google Scholar
18.Ahn, H-R and Nam, S (2013) Wideband microstrip coupled-line ring hybrid for high power-division ratios. IEEE Transactions on Microwave Theory and Techniques 61(5), 1768–1780.Google Scholar
19.Honari, MM et al. (2015) Class of miniaturized/arbitrary power division ratio couplers with improved design flexibility. IET Microwaves, Antennas & Propagation 21(10), 1066–1073.Google Scholar
20.Chaudhary, G and Jeong, Y (2016) Arbitrary power division ratio rat-race coupler with negative group delay characteristics. IEEE Microwave and Wireless Components Letters 26(8), 565–568.Google Scholar
21.Ho, K-L and Chi, P-L (2014) Miniaturized and large-division-ratio ring coupler using novel transmission-line elements. IEEE Microwave and Wireless Components Letters 24(1), 35–37.Google Scholar
22.Park, M-J and Lee, B (2011) Design of ring couplers for arbitrary power division with 50 Ω line. IEEE Microwave and Wireless Components Letters 21(4), 185–187.Google Scholar
23.Hsu, C-L, Kuo, J-T and Chang, C-W (2009) Miniaturized dual-band hybrid couplers with arbitrary power division ratios. IEEE Transactions on Microwave Theory and Techniques 57(1), 149–156.Google Scholar
24.Dong, Y and Itoh, T (2010) Application of composite right/left-handed half-mode substrate integrated waveguide to the design of a dual-band rat-race coupler. IEEE MTT-S International Microwave Symposium Digest, Anaheim, California, USA, pp. 712–715.Google Scholar
25.Rosenberg, U et al. (2013) A novel frequency-selective power combiner/divider in single-layer substrate integrated waveguide technology. IEEE Microwave and Wireless Components Letters 23(8), 406–408.Google Scholar
26.Piloto, A et al. (1995) Waveguide filters having a layered dielectric structures. US Patent 5 382931. Pittsburgh, PA: Westinghouse Electric Corporation.Google Scholar
27.Uchimura, H, Takenoshita, T and Fuji, M (1998) Development of a “laminated waveguide”. IEEE Transactions on Microwave Theory and Techniques 46(12), 2438–2443.Google Scholar
28.Deslands, D and Wu, K (2001) Integrated microstrip and rectangular waveguide in planar form. IEEE Microwave and Wireless Components Letters 11(2), 68–70.Google Scholar
29.Deslands, D and Wu, K (2003) Single-substrate integration technique of planar circuits and waveguide filters. IEEE Transactions on Microwave Theory and Techniques 51(2), 593–596.Google Scholar
30.Chang, C-Y and Hsu, W-C (2002) Novel planar, square-shaped, dielectric waveguide, single-, and dual-mode filters. IEEE Transactions on Microwave Theory and Techniques 50(11), 2527–2536.Google Scholar
31.Wang, Y et al. (2007) Half mode substrate integrated waveguide (HMSIW) bandpass filter. IEEE Microwave and Wireless Components Letters 17(4), 265–267.Google Scholar
32.Ho, M-H and Li, C-S (2013) Novel balanced bandpass filters using substrate integrated half-mode waveguide. IEEE Microwave and Wireless Components Letters 23(2), 78–80.Google Scholar
33.Xu, X, Wang, J and Zhu, L (2013) A new approach to design differential-mode bandpass filters on SIW structure. IEEE Microwave and Wireless Components Letters, 23 (12), 635–637.Google Scholar
34.Chen, M-Y, Hong, W and Ho, M-H (2014) Balanced BPF design of substrate integrated waveguide cavity using hybrid microstrip/slot feed for CM suppression. IET Electronics Letters 50(21), 1533–1534.Google Scholar
35.Liu, B et al. (2007) Half mode substrate integrated waveguide (HWSIW) 3-dB coupler. IEEE Microwave and Wireless Components Letters 17(1), 22–24.Google Scholar
36.Liu, B et al. (2007) Half-mode substrate integrated waveguide (HMSIW) double-slot coupler. IET Electronics Letters 43(2), 113–114.Google Scholar
37.Zhai, GH et al. (2008) Folded half mode substrate integrated 3 dB coupler. IEEE Microwave and Wireless Components Letters 18(8), 512–514.Google Scholar
38.Hong, W, Ho, M-H and Feng, J-J (2016) Wideband coupler of folded half mode substrate integrated waveguide design with combined microstrip and stripline feed. Microwave and Optical Technology Letters 58(5), 1139–1141.Google Scholar
39.Harrington, RF (2001) Time-Harmonic Electromagnetic Fields. New York: John Wiley & Sons.Google Scholar