Vol. 35
Latest Volume
All Volumes
PIERL 123 [2025] PIERL 122 [2024] PIERL 121 [2024] PIERL 120 [2024] PIERL 119 [2024] PIERL 118 [2024] PIERL 117 [2024] PIERL 116 [2024] PIERL 115 [2024] PIERL 114 [2023] PIERL 113 [2023] PIERL 112 [2023] PIERL 111 [2023] PIERL 110 [2023] PIERL 109 [2023] PIERL 108 [2023] PIERL 107 [2022] PIERL 106 [2022] PIERL 105 [2022] PIERL 104 [2022] PIERL 103 [2022] PIERL 102 [2022] PIERL 101 [2021] PIERL 100 [2021] PIERL 99 [2021] PIERL 98 [2021] PIERL 97 [2021] PIERL 96 [2021] PIERL 95 [2021] PIERL 94 [2020] PIERL 93 [2020] PIERL 92 [2020] PIERL 91 [2020] PIERL 90 [2020] PIERL 89 [2020] PIERL 88 [2020] PIERL 87 [2019] PIERL 86 [2019] PIERL 85 [2019] PIERL 84 [2019] PIERL 83 [2019] PIERL 82 [2019] PIERL 81 [2019] PIERL 80 [2018] PIERL 79 [2018] PIERL 78 [2018] PIERL 77 [2018] PIERL 76 [2018] PIERL 75 [2018] PIERL 74 [2018] PIERL 73 [2018] PIERL 72 [2018] PIERL 71 [2017] PIERL 70 [2017] PIERL 69 [2017] PIERL 68 [2017] PIERL 67 [2017] PIERL 66 [2017] PIERL 65 [2017] PIERL 64 [2016] PIERL 63 [2016] PIERL 62 [2016] PIERL 61 [2016] PIERL 60 [2016] PIERL 59 [2016] PIERL 58 [2016] PIERL 57 [2015] PIERL 56 [2015] PIERL 55 [2015] PIERL 54 [2015] PIERL 53 [2015] PIERL 52 [2015] PIERL 51 [2015] PIERL 50 [2014] PIERL 49 [2014] PIERL 48 [2014] PIERL 47 [2014] PIERL 46 [2014] PIERL 45 [2014] PIERL 44 [2014] PIERL 43 [2013] PIERL 42 [2013] PIERL 41 [2013] PIERL 40 [2013] PIERL 39 [2013] PIERL 38 [2013] PIERL 37 [2013] PIERL 36 [2013] PIERL 35 [2012] PIERL 34 [2012] PIERL 33 [2012] PIERL 32 [2012] PIERL 31 [2012] PIERL 30 [2012] PIERL 29 [2012] PIERL 28 [2012] PIERL 27 [2011] PIERL 26 [2011] PIERL 25 [2011] PIERL 24 [2011] PIERL 23 [2011] PIERL 22 [2011] PIERL 21 [2011] PIERL 20 [2011] PIERL 19 [2010] PIERL 18 [2010] PIERL 17 [2010] PIERL 16 [2010] PIERL 15 [2010] PIERL 14 [2010] PIERL 13 [2010] PIERL 12 [2009] PIERL 11 [2009] PIERL 10 [2009] PIERL 9 [2009] PIERL 8 [2009] PIERL 7 [2009] PIERL 6 [2009] PIERL 5 [2008] PIERL 4 [2008] PIERL 3 [2008] PIERL 2 [2008] PIERL 1 [2008]
2012-09-28
High-Isolation and Wide-Band 180º Hybrids Based on Electronically Tunable Lumped-Element Filters
By
Progress In Electromagnetics Research Letters, Vol. 35, 63-72, 2012
Abstract
A new high isolation lumped-element 180º hybrid, using electronically adjustable filters with varactor diodes, are proposed. This design is very simple and is based on only two configurable low order (N = 2) filters. Due to the limited tuning frequency range of varactor diodes, maximum near-octave frequency coverage of 2.5-5 GHz was planned in the high isolation hybrid. An impressive simulated typical isolation in the range of >60dB was achieved. One of the typical applications of developed hybrids could be the conversion of 70MHz IF to microwave frequencies, with broadband mixers in single-conversion converters, and with very high LO rejection (>60 dB).
Citation
Iñaki Gurutzeaga, Ane Insausti, Egoitz Celayeta, and Beatriz Sedano, "High-Isolation and Wide-Band 180º Hybrids Based on Electronically Tunable Lumped-Element Filters," Progress In Electromagnetics Research Letters, Vol. 35, 63-72, 2012.
doi:10.2528/PIERL11123009
References

1. March, S., "A wide band stripline hybrid ring," IEEE Trans. on Microwave Theory & Tech., Vol. 16, No. 6, 361, Jun. 1968.
doi:10.1109/TMTT.1968.1126693

2. Kang, I.-H. and K. Wang, "A broadband rat-race ring coupler with tightly coupled lines," IEICE Trans. on Commun., Vol. E88-B, No. 10, 4087-4089, Oct. 2005.
doi:10.1093/ietcom/e88-b.10.4087

3. Chiu, L., Q. Xue, and C. H. Chan, "A compact wideband parallel- strip 180o hybrid coupler," Microwave and Optical Technology Letters, Dec. 2008.

4. Zubillaga, I. G., "Single side-band modulator with suppressed carrier --- SSBSC --- By direct conversion of 70MHz intermediate frequency to ultra-wide band of microwave range (2.5 to 10.5 GHZ),", Ph. Doctoral Thesis, Tenun-University of Navarra,Dec. 2008, http://dspace.unav.es/dspace/handle/10171/18734.

5. Parisi, S. J., "A lumped element rat-race coupler," Applied Microwaves, 84-93, Aug./Sep. 1989.

6. Staudinger, J. and J. Costa, "Lumped-element networks compose wide-bandwidth balun," Microwaves & RF, 1993.

7. Giannini, F. and L. Scucchia, Dual-Band 180o Lumped-element Hybrid: Mixer Application, Wiley Interscience, 2004.

8. Kuylenstierna, , D. and P. Linner, "Design of broad-band lumped-elements baluns with inherent impedance transformation," IEEE Trans. on Microwave Theory & Tech., Vol. 52, No. 12, Dec. 2004.

9. Vendik, I., D. Kholodnyak, P. Kapitanova, M. A. Hein, S. Humbla, R. Perrone, and J. Mueller, "Tuneable dual-band microwave devices based on a combination of left/right-handed transmission lines," Proceedings of the 38th European Microwave Conference EuMA, 2008.

10. Kapitanova, P., D. Kholodnyak, and I. Vendik, "Tuneable lumped-element directional coupler using metamaterial transmission lines," Proceedings of the 39th European Microwave Conference, EuMA , 2009.

11. Hartley, R. V. L., "Modulation system," US Patent 1666, 206, 1923.

12. Parisi, S. J., "Monolithic, lumped element, single sideband modulator," IEEE MTT-S Digest, 1992.

13. Smv2019-smv2023 series hyperabrupt junction tuning varactors, Data-Sheet Skyworks Solutions Inc., 2011, www.skyworksinc.com.