Develop Dual-Mode DGS Bandpass Filters Using High Quality Factor Aluminum Oxide Ceramic Substrates

Abstract:

Article Preview

Aluminum Oxide microwave dielectric ceramics exhibit good microwave dielectric characteristics and suitable be used in the microwave devices. In this letter, using screen-printing technique and Ag/Pd paste, a novel dual-mode 2.4 GHz microstrip bandpass filter with U-shaped defected ground structure is screen printed on the Aluminum Oxide (Al2O3, relative dielectric constant=9.8) microwave dielectric ceramic substrate. In addition, a pair of input/output microstrip lines are designed to be 50 Ω and coupled to a λ/4×λ/4 square loop resonator. And in the ground plane, a U-shaped defected ground structure is used toλ excite the degenerate modes, which can be considered as a perturbation element to control the odd-mode frequency and -3 dB bandwidth of the bandpass filter. Finally, the coupling effects between these degenerate modes are presented and detailed investigated.

Info:

Periodical:

Key Engineering Materials (Volumes 512-515)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1115-1118

DOI:

10.4028/www.scientific.net/KEM.512-515.1115

Citation:

C. M. Cheng et al., "Develop Dual-Mode DGS Bandpass Filters Using High Quality Factor Aluminum Oxide Ceramic Substrates", Key Engineering Materials, Vols. 512-515, pp. 1115-1118, 2012

Online since:

June 2012

Export:

Price:

$38.00

[1] I. Wolff, Microstrip bandpass filter using degenerate modes of a microstrip ring resonator, Electron. Lett., 8 (1972) 302.

DOI: 10.1049/el:19720223

[2] A. C. Kundu and I. Awai, Control of attenuation pole frequency of a dual-mode microstrip ring resonator bandpass filter, IEEE Trans. Microw. Theory Tech., 49 (2001) 1113.

DOI: 10.1109/22.925499

[3] M. Matsuo, H. Yabuki, and M. Makimoto, Dual-mode stepped impedance ring resonator for bandpass filter applications, IEEE Trans. Microw. Theory Tech., 49 (2001) 1235.

DOI: 10.1109/22.932241

[4] D. Ahn, J. S. Park, C. S. Kim, J. Kim, Y. X. Qian, and T. Itoh, A design of the lowpass filter using the novel microstrip defected ground structure, IEEE Trans. Microw. Theory Tech., 49 (2001) 86.

DOI: 10.1109/22.899965

[5] S. W. Ting, K. W. Tam, and R. P. Martina, Miniaturized microstrip lowpass filter with wide-stopband using double equilateral U-shaped defected ground structure, IEEE Microw. Wireless Compon. Lett., 16 (2006) 240.

DOI: 10.1109/lmwc.2006.873592

In order to see related information, you need to Login.