A Low Noise Microwave Filter with Minimum Distortion
In this paper, a low noise microwave bandpass filter
(BPF) is presented. This filter is fabricated by modifying the
conventional cross-coupled structure. The spurious response is
improved by using the end open coupled lines, and the influence of the
noise is minimized. Impedance matrix of the open end coupled circuit
clarifies the characteristic of the suppression of the spurious response.
The rejection of spurious suppression region of the proposed filter is
greater than 20 dB from 3-13 GHz. The measured results of the
fabricated filter confirm the concepts of the proposed design and
exhibits high performance.
[1] R. E. Ziemer, and W. H. Tranter, Principles of communications: systems,
modulation, and noise, 5th ed. New York: Wiley, 2002.
[2] J. S. Hong, and M. J. Lancaster, "Couplings of microstrip square
open-loop resonators for cross-coupled planar microwave filter," IEEE
Trans. Microwave Theory Tech., vol. 44, no. 12, pp. 2099-2109, Dec.
1996.
[3] J. S. Hong, and M. L. Lancaster, Microstrip filters for RF/microwave
application, New York: Wiley, 2001.
[4] D. Ahn, J. S. Park, C. S. Kim, J. Kim, T. Qian, and T. Itoh, "A design of
the low-pass filter using the novel microstrip defected ground structure,"
IEEE Trans. Microwave Theory Tech., vol. 49, no. 1, pp. 86-93, Jan.
2001.
[5] H. W. Liu, Z. F. Li, X. W. Sun, and J. F. Mao, "An improved 1-D periodic
defected ground structure for microstrip line," IEEE Microwave and
Wireless Components Letters, vol. 14, no. 4, pp. 180-182, Apr. 2004.
[6] K. F. Chang, and K. W. Tam, "Miniaturized cross-coupled filter with
second and third spurious responses suppression," IEEE Microwave and
Wireless Components Letters, vol. 15, no. 2, pp. 122-124, Feb. 2005.
[7] D. M. Pozap, Microwave engineering, 2nd ed. New York: Wiley, 1998.
[8] T. SHIBATA, T. HAYASHI, and T. KIMURA, "Analysis of microstrip
circuits using three-dimensional full-wave electromagnetic field analysis
in the time domain," IEEE Trans. Microwave Theory Tech., vol. 36, no. 6,
pp. 1064-1070, June 1988.
[1] R. E. Ziemer, and W. H. Tranter, Principles of communications: systems,
modulation, and noise, 5th ed. New York: Wiley, 2002.
[2] J. S. Hong, and M. J. Lancaster, "Couplings of microstrip square
open-loop resonators for cross-coupled planar microwave filter," IEEE
Trans. Microwave Theory Tech., vol. 44, no. 12, pp. 2099-2109, Dec.
1996.
[3] J. S. Hong, and M. L. Lancaster, Microstrip filters for RF/microwave
application, New York: Wiley, 2001.
[4] D. Ahn, J. S. Park, C. S. Kim, J. Kim, T. Qian, and T. Itoh, "A design of
the low-pass filter using the novel microstrip defected ground structure,"
IEEE Trans. Microwave Theory Tech., vol. 49, no. 1, pp. 86-93, Jan.
2001.
[5] H. W. Liu, Z. F. Li, X. W. Sun, and J. F. Mao, "An improved 1-D periodic
defected ground structure for microstrip line," IEEE Microwave and
Wireless Components Letters, vol. 14, no. 4, pp. 180-182, Apr. 2004.
[6] K. F. Chang, and K. W. Tam, "Miniaturized cross-coupled filter with
second and third spurious responses suppression," IEEE Microwave and
Wireless Components Letters, vol. 15, no. 2, pp. 122-124, Feb. 2005.
[7] D. M. Pozap, Microwave engineering, 2nd ed. New York: Wiley, 1998.
[8] T. SHIBATA, T. HAYASHI, and T. KIMURA, "Analysis of microstrip
circuits using three-dimensional full-wave electromagnetic field analysis
in the time domain," IEEE Trans. Microwave Theory Tech., vol. 36, no. 6,
pp. 1064-1070, June 1988.
@article{"International Journal of Electrical, Electronic and Communication Sciences:52947", author = "Cheng Yuan Hung and Min Hang Weng and Siang Wen Lan and Wei Yu Chen and Hung Wei Wu and Chun Yueh Huang", title = "A Low Noise Microwave Filter with Minimum Distortion", abstract = "In this paper, a low noise microwave bandpass filter
(BPF) is presented. This filter is fabricated by modifying the
conventional cross-coupled structure. The spurious response is
improved by using the end open coupled lines, and the influence of the
noise is minimized. Impedance matrix of the open end coupled circuit
clarifies the characteristic of the suppression of the spurious response.
The rejection of spurious suppression region of the proposed filter is
greater than 20 dB from 3-13 GHz. The measured results of the
fabricated filter confirm the concepts of the proposed design and
exhibits high performance.", keywords = "Low noise, signal transmission, bandpass filter, end
open coupled line, communication system.", volume = "6", number = "5", pages = "495-4", }