Improved Performance of Radial Elliptical Low-Pass Filter for ISM Band
Tóm tắt
A microstrip elliptic-function Low-Pass filter (LPF) utilizing a Radial Stub (RS) is proposed having an attributes of sharp roll-off and wide rejection bandwidth. The proposed LPF is explored based on a proper ideal lumped equivalent model circuit. The proposed fabricated LPF having a cutoff frequency of 2.4 GHz are of dimension 0.505 λc × 0.217 λc (where λc is the guided wavelength at the cutoff frequency) shows a magnificent wide out of band from 3 GHz to 15 GHz at 10 dB. The filters are evaluated by design, experimental and simulation with good agreement.
Tài liệu tham khảo
J.S. Hong, M.J. Lancaster, Microstrip Filters for RF/Microwave Applications (Wiley, New York, 2001)
D. Kurita, K. Li, Super UWB low pass filter using open-circuited radial stubs. IEICE Electron. Exp. 4, 211–215 (2007)
M. Hayati, M. Amiri, Z. Faramarzi, A novel compact microstrip low pass filter with wide rejection band and sharp transition band using diamond-shaped resonator. Int. J. Microw. Wirel. Technol. 5, 713–719 (2013)
S. Lotfi, S.V.A.D. Makki, S. Majidifar, Design of microstrip low pass filter with ultra-wide stopband and sharp rejection. Int. J. Eng. Technol. Sci. 2, 47–57 (2014)
J. Gu, X. Sun, Compact low pass filter using spiral compact microstrip resonant cells. Electron. Lett. 41, 1065–1066 (2005)
A.K. Tiwary, N. Gupta, Performance of microstrip low-pass filter on electromagnetic band gap ground plane. IETE J. Res. 56, 230–234 (2010)
M. Nosrati, T. Faraji, Z. Atlasbaf, A compact composite broad stop-band elliptic function low pass filter for ultra wide-band applications using interdigital capacitors. Prog. Electromagn. Res. Stockholm, Sweden 7, 87–95 (2009)
L.-H. Hsieh, K. Chang, Compact elliptic function low pass filters using microstrip stepped-impedance hairpin resonators. IEEE Trans. Microw. Theory Tech. 51, 193–199 (2003)
J. Yang, W. Wu, Compact elliptic function low pass filter using defected ground structure. IEEE Microw. Wirel. Compon. Lett. 18, 578–580 (2008)
W.-H. Tu, K. Chang, Microstrip elliptic function low pass filters using distributed elements or slotted ground structure. IEEE Trans. Microw. Theory Tech. 54, 3786–3792 (2006)
T. Moyra, S.K. Parui, S. Das, Design of a quasi-elliptic low pass filter using a new defected ground structure and capacitively loaded microstrip line. Int. J. Elec. Eng. Inf. 3, 61–73 (2011)
V.K. Velidi, S. Sanyal, Sharp roll-off low pass filter with wide stopband using stub-loaded coupled-line hairpin unit. IEEE Microw. Wirel. Compon. Lett. 21, 301–303 (2011)
MdC Velazquez-Ahumada, J. Martel, F. Medina, Design of compact low pass elliptic filters using double-sided MIC technology. IEEE Trans. Microw. Theory Tech. 55, 121–127 (2007)
M. Hayati, A. Lotfi, Elliptic function low pass filter with sharp cutoff frequency using slit-loaded tapered compact microstrip resonator cell. Electron. Lett. 46, 143–144 (2010)
F. Wei, L. Chen, X.-W. Shi, Q.-L. Huang, X.-H. Wang, Compact low pass filter with wide stop-band using coupled-line hairpin unit. Electron. Lett. 46, 88–90 (2010)
F. Giannini, R. Sorrentino, J. Vrba, Planar circuit analysis of microstrip radial stub. IEEE Trans. Microw. Theory Tech. 52, 1652–1655 (1984)
H. Kwon, H. Lim, B. Kang, Design of 6–18 GHz wideband phase shifters using radial stubs. IEEE Microw. Wirel. Compon. Lett. 17, 205–207 (2007)