Design of Lowpass Filter and Lowpass-Highpass Diplexer with LTCC Technology
关键词:
Coupled lines, Low-Temperature Cofired Ceramic (LTCC), Lowpass filter (LPF), LowpassHighpass Diplexer (LPD)摘要
A compact lowpass filter (LPF) and a lowpasshighpass diplexer (LPD) with both sharp roll-off and wide stopband is presented in this paper. The proposed LPF is realized by cascading modified hairpin unit consisting of one U-shape stripline and one pair of offsetcoupled striplines with multilayer low-temperature cofired ceramic (LTCC) technology. The LPD is realized by shunting a lowpass filter and a highpass filter at a common junction to achieve all-reject in one port. Good agreement can be achieved by the simulated and measured results.
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参考
L. K. Yeung and K. L. Wu, “A compact secondorder LTCC bandpass filter with two finite transmission zeros,” IEEE Trans. Microwave Theory & Tech., vol. 51, no. 2, pp. 337-341, Feb. 2003.
T. M. Shen, C. F. Chen, T. Y. Huang, et al., “Design of vertically stacked waveguide filters in LTCC,” IEEE Trans. Microwave Theory & Tech., vol. 55, no. 8, pp. 1771-1779, Aug. 2007.
R. L. Li, G. DeJean, M. Maeng, et al., “Design of compact stacked-patch antennas in LTCC multilayer packaging modules for wireless applications,” IEEE Trans. Compon., Packag., Manuf. Technol., vol. 27, no. 4, pp. 581-589, Mar. 2013.
A. Nafe and A. Shamim, “An integrable SIW phase shifter in a partially magnetized ferrite LTCC package,” IEEE Trans. Microwave Theory & Tech., vol. 63, no. 7, pp. 2264-2274, Jul. 2015.
C. H. Tseng, “Compact LTCC rat-race couplers using multilayered phase-delay and phase-advance T-equivalent sections,” IEEE Trans. Compon., Packag., Manuf. Technol., vol. 33, no. 2, pp. 543- 551, May 2010.
I. S. Kim and S. W. Yun, “Compact LPF using asymmetrical microstrip step discontinuity for harmonic suppression,” Electron. Lett., vol. 41, no. 16, pp. 41-42, Aug. 2005.
J. L. Li, S. W. Qu, and Q. Xue, “Compact microstrip lowpass filter with sharp roll-off and wide stopband,” Electron. Lett., vol. 45, no. 2, pp. 110-111, Jan. 2009.
L. H. Hsieh and K. Chang, “Compact ellipticfunction low-pass filters using microstrip steppedimpedance hairpin resonators,” IEEE Trans. Microw. Theory Tech., vol. 51, no. 1, pp. 193-198, Jan. 2003.
S. Luo, L. Zhu, and S. Sun, “Stopband-expanded low-pass filters using microstrip coupled-line hairpin units,” IEEE Microw. Wireless Compon. Lett., vol. 18, no. 8, pp. 506-508, Aug. 2008.
F. Wei, L. Chen, X. W. Shi, Q. L. Huang, and X. H. Wang, “Compact lowpass filter with wide stopband using coupled-line hairpin unit,” Electron. Lett., vol. 46 no. 1, pp. 88-90, Jan. 2010.
L. Li, Z. F. Li, and J. F. Mao, “Compact lowpass filters with sharp and expanded stopband using stepped impedance hairpin units,” IEEE Microw. Wireless Compon. Lett., vol. 20, no. 6, pp. 310-312, Jun. 2010.
V. K. Velidi and S. Sanyal, “Sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit,” IEEE Microw. Wireless Compon. Lett., vol. 21, no. 6, pp. 301-303, Jun. 2011.
X. B. Wei, P. Wang, M. Q. Liu, and Y. Shi, “Compact wide-stopband lowpass filter using stepped impedance hairpin resonator with radial stubs,” Electron. Lett., vol. 47, no. 15, pp. 862-863, Jul. 2011.
M. Kufai and Z. Raida, “Lowpass filter with reduced fractal defected ground structure,” Electron. Lett., vol. 49, no. 3, pp. 199-200, Jan. 2013
P. H. Deng and J. T. Tsai, “Design of microstrip lowpass-bandpass diplexer,” IEEE Microw. Wireless Compon. Lett., vol. 23, no. 7, pp. 332-334, Jul. 2013.
M. Jung and B. W. Min, “Microstrip lowpasshighpass diplexer for a quadplexer application,” Microw. Opt. Technol. Lett., vol. 56, no. 9, pp. 332- 334, Jul. 2014.
J. S. Hong and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, New York: Wiley, 2001.
