Vol. 13
Latest Volume
All Volumes
PIERC 142 [2024] PIERC 141 [2024] PIERC 140 [2024] PIERC 139 [2024] PIERC 138 [2023] PIERC 137 [2023] PIERC 136 [2023] PIERC 135 [2023] PIERC 134 [2023] PIERC 133 [2023] PIERC 132 [2023] PIERC 131 [2023] PIERC 130 [2023] PIERC 129 [2023] PIERC 128 [2023] PIERC 127 [2022] PIERC 126 [2022] PIERC 125 [2022] PIERC 124 [2022] PIERC 123 [2022] PIERC 122 [2022] PIERC 121 [2022] PIERC 120 [2022] PIERC 119 [2022] PIERC 118 [2022] PIERC 117 [2021] PIERC 116 [2021] PIERC 115 [2021] PIERC 114 [2021] PIERC 113 [2021] PIERC 112 [2021] PIERC 111 [2021] PIERC 110 [2021] PIERC 109 [2021] PIERC 108 [2021] PIERC 107 [2021] PIERC 106 [2020] PIERC 105 [2020] PIERC 104 [2020] PIERC 103 [2020] PIERC 102 [2020] PIERC 101 [2020] PIERC 100 [2020] PIERC 99 [2020] PIERC 98 [2020] PIERC 97 [2019] PIERC 96 [2019] PIERC 95 [2019] PIERC 94 [2019] PIERC 93 [2019] PIERC 92 [2019] PIERC 91 [2019] PIERC 90 [2019] PIERC 89 [2019] PIERC 88 [2018] PIERC 87 [2018] PIERC 86 [2018] PIERC 85 [2018] PIERC 84 [2018] PIERC 83 [2018] PIERC 82 [2018] PIERC 81 [2018] PIERC 80 [2018] PIERC 79 [2017] PIERC 78 [2017] PIERC 77 [2017] PIERC 76 [2017] PIERC 75 [2017] PIERC 74 [2017] PIERC 73 [2017] PIERC 72 [2017] PIERC 71 [2017] PIERC 70 [2016] PIERC 69 [2016] PIERC 68 [2016] PIERC 67 [2016] PIERC 66 [2016] PIERC 65 [2016] PIERC 64 [2016] PIERC 63 [2016] PIERC 62 [2016] PIERC 61 [2016] PIERC 60 [2015] PIERC 59 [2015] PIERC 58 [2015] PIERC 57 [2015] PIERC 56 [2015] PIERC 55 [2014] PIERC 54 [2014] PIERC 53 [2014] PIERC 52 [2014] PIERC 51 [2014] PIERC 50 [2014] PIERC 49 [2014] PIERC 48 [2014] PIERC 47 [2014] PIERC 46 [2014] PIERC 45 [2013] PIERC 44 [2013] PIERC 43 [2013] PIERC 42 [2013] PIERC 41 [2013] PIERC 40 [2013] PIERC 39 [2013] PIERC 38 [2013] PIERC 37 [2013] PIERC 36 [2013] PIERC 35 [2013] PIERC 34 [2013] PIERC 33 [2012] PIERC 32 [2012] PIERC 31 [2012] PIERC 30 [2012] PIERC 29 [2012] PIERC 28 [2012] PIERC 27 [2012] PIERC 26 [2012] PIERC 25 [2012] PIERC 24 [2011] PIERC 23 [2011] PIERC 22 [2011] PIERC 21 [2011] PIERC 20 [2011] PIERC 19 [2011] PIERC 18 [2011] PIERC 17 [2010] PIERC 16 [2010] PIERC 15 [2010] PIERC 14 [2010] PIERC 13 [2010] PIERC 12 [2010] PIERC 11 [2009] PIERC 10 [2009] PIERC 9 [2009] PIERC 8 [2009] PIERC 7 [2009] PIERC 6 [2009] PIERC 5 [2008] PIERC 4 [2008] PIERC 3 [2008] PIERC 2 [2008] PIERC 1 [2008]
2010-05-20
Utilizing Nonuniform Coupled Transmission Lines to Compact Microstrip Circuits Such as Edge-Coupled Bandpass Filters
By
Progress In Electromagnetics Research C, Vol. 13, 231-243, 2010
Abstract
In this paper, we propose a method to reduce the length of the narrowband microstrip Uniform Coupled Transmission Lines (UCTLs), which has a general application to compact microstrip circuits. In this method, we use Nonuniform Coupled Transmission Lines (NCTLs) instead of UCTLs. To synthesize the desired NCTLs, their normalized width and gap are expanded as two truncated Fourier series. Then, the optimal values of the coefficients of the series are obtained through an optimization approach. The usefulness of the proposed method is verified using some examples. Also, an edged-coupled bandpass filter is compacted using the proposed method and then is fabricated and measured.
Citation
Mohammad Khalaj-Amirhosseini, and Ali H.Tehrani, "Utilizing Nonuniform Coupled Transmission Lines to Compact Microstrip Circuits Such as Edge-Coupled Bandpass Filters," Progress In Electromagnetics Research C, Vol. 13, 231-243, 2010.
doi:10.2528/PIERC10031009
References

1. Dwari, S. and S. Sanyal, "Size reduction and harmonic suppression of microstrip branch-line coupler using defected ground structure," Microwave and Optical Technology Letters, Vol. 48, 1966-1969, 2006.
doi:10.1002/mop.21830

2. Falcone, F., T. Lopetegi, and M. Sorolla, "1-D and 2-D photonic bandgap microstrip structures," Microwave and Optical Technology Letters, Vol. 22, No. 6, 411-412, Sep. 1999.
doi:10.1002/(SICI)1098-2760(19990920)22:6<411::AID-MOP13>3.0.CO;2-U

3. Mandal, M. K., V. K. Velidi, A. Bhattacharya, and S. Sanyal, "Miniaturized quadrature hybrid coupler using high impedance lines," Microwave and Optical Technology Letters, Vol. 50, 1135-1137, May 2008.
doi:10.1002/mop.23320

4. Chen, W.-L. and G.-M. Wang, "Design of novel miniaturized fractal-shaped branch-line couplers," Microwave and Optical Technology Letters, Vol. 50, 1198-1201, May 2008.
doi:10.1002/mop.23316

5. Sakagami, I., M. Haga, and T. Munehiro, "Reduced branch-line coupler using eight two-step stubs," IEE Proc.-Microw. Antennas Propag., Vol. 146, No. 6, 455-460, Dec. 1999.
doi:10.1049/ip-map:19990785

6. Khalaj-Amirhosseini, M., "Nonuniform transmission lines as compact uniform transmission lines," Progress In Electromagnetics Research C, Vol. 4, 205-211, 2008.

7. Hosseini, F., M. Khalaj-Amirhosseini, and M. Yazdani, "A miniaturized Wilkinson power divider using nonuniform transmission line," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 7, 917-924, June 2009.
doi:10.1163/156939309788355243

8. Paul, C. R., "Analysis of Multiconductor Transmission Lines," John Wiley and Sons Inc., 1994.

9. Khalaj-Amirhosseini, M., "Using linear sections instead of uniform ones to analyze the coupled nonuniform transmission lines," Int. Journal of RF and Microwave Computer-aided Engineering, Vol. 19, No. 1, 75-79, January 2009.
doi:10.1002/mmce.20317

10. Khalaj-Amirhosseini, M., "Analysis of coupled or single nonuni-form transmission lines using step-by-step numerical integration," Progress In Electromagnetics Research, Vol. 58, 187-198, 2006.

11. Khalaj-Amirhosseini, M., "Analysis of coupled nonuniform transmission lines using Taylor's series expansion," IEEE Trans. Electromagn. Compat., 594-600, Aug. 2006.
doi:10.1109/TEMC.2006.879340

12. Khalaj-Amirhosseini, M., "Analysis of periodic and aperiodic coupled nonuniform transmission lines using the Fourier series expansion ," Progress In Electromagnetics Research, Vol. 65, 15-26, 2006.

13. Khalaj-Amirhosseini, M., "Analysis of coupled or single nonuniform transmission lines using the equivalent sources method," IEEE Symp. Mic. Ant. Prop. EMC (MAPE 2007 ), Hangzhou, China, August 14-17, 2007.

14. Khalaj-Amirhosseini, M., "Analysis of coupled or single nonuni-form transmission lines using the method of moments," Int. Journal of RF and Microwave Computer-aided Engineering, Vol. 18, No. 4, 376-382, July 2008.
doi:10.1002/mmce.20295

15. Khalaj-Amirhosseini, M., "A closed form analytic solution for coupled nonuniform transmission lines," Progress In Electromagnetics Research C, Vol. 1, 95-103, 2008.
doi:10.2528/PIERC08011606

16. Khalaj Amirhosseini, M., "Determination of capacitance and conductance matrices of lossy shielded coupled microstrip transmission lines," Progress In Electromagnetics Research, Vol. 50, 267-278, 2005.
doi:10.2528/PIER04061601

17. Le Roy, M., A. Perennec, S. Toutain, and L. C. Calvez, "Continuously varying coupled transmission lines applied to design band-pass filter ," Int. Journal of RF and Microwave Computer-aided Engineering, Vol. 12, No. 3, 288-295, May 2002.
doi:10.1002/mmce.10025