M. MABROUK ET AL.

Copyright © 2011 SciRes. CS

296

0.5 11.5 22.5 33.5 44.5

-70

-60

-50

-40

-30

-20

-10

0

Frequency [GHz]

Magnitude [dB]

S

11

Simulation

S

21

Simulation

S

11

Meas ure me nt

S

21

Meas ure me nt

Figure 4. Simulated and measured S11, S21 parameters of dual-band filter.

physical parameters H and

r respectively of Duroid

substrate used during design and measurements.

5. Acknowledgements

The authors would like to acknowledge and extend their

gratitude to our partner Xiu Yin Zhang, Associate Pro-

fessor with the School of Electronic and Information

Engineering (South China University of Technology,

Guangzhou, 510641, China) who has carried out and

provided the experimental measurements of studied pro-

totype of filter.

6. References

[1] C. Y. Chen, C. Y. Hsu and H. R. Chuong, “Design of

Miniature Planar Dual Band Filter Using Dual-Feeding

Structures and Embedded Resonators,” IEEE Microwave

and Wireless Components Letters, Vol. 16, No. 12, 2006,

pp. 669-671. doi:10.1109/LMWC.2006.885621

[2] S. F. Chang, Y. H. Jeng and J. L. Chen, “Dual-Band Step

Impedance Band Pass Filter for Multimode Wireless

LANs,” Electronic Letters, Vol. 40, No. 1, 2004, pp. 38-39.

doi:10.1049/el:20040065

[3] I. C. Hunter, L. Billonet, B. Jarry and P. Guillon, “Micro-

wave Filters—Applications and T echnology,” IEEE Micro-

wave Theory and Techniques Transactions, Vol. 50, No.

3, March 2002, pp. 794-805.

doi:10.1109/22.989963

[4] H. Miyake, S. Kitazawa, T. Ishizaki, T. Ymanda and Y.

Nagatomi, “A Miniaturized Monolithic Dual-band Filter

Using Ceramic Lamination Technique for Dual Mode

Portable Telephones,” IEEE MTT-S International Micro-

wave Symposium Digest, 8-13 June 1997, Vol. 2, pp.

789-792.

[5] J. T. Kuo, T. H. Yeh and C. Yeh, “Design of Microstrip

Bandpass Filters with a Dual Pass Band Response,” IEEE

Microwave Theory and Techniques Transactions, Vol. 53,

No. 4, April 2005, pp. 1331-1337.

doi:10.1109/TMTT.2005.845765

[6] X. Y. Zhang, J. X. Chen and Q. Xue, “Dual-band Band

Pass Filters Using Stub-Loaded Resonators,” IEEE Micro-

wave and Wireless Components Letters, Vol. 17, No. 8,

2007, pp. 583-585. doi:10.1109/LMWC.2007.901768

[7] A. Balalem, W. Menzel and A. Omar, “Quasi Lumped

Open Loop Suspended Stripline Bandpass Filters,” 36th

European Microwave Conference, Manchester, 10-15 Sep-

tember 2006, pp. 568-571.

[8] A. Balalem, J. Machac and A. Omar, “Dual-band Bandpass

Filter by Using Square Loop Dual Mode Resonator,”

International Journal of Microwave and Optical Tech-

nology, Vol. 50, No. 6, June 2008, pp. 1567-1570.

doi:10.1002/mop.23427

[9] “RT/duroid® 6006/6010LM High Frequency Laminates,”

1998.

http://www.rogerscorp.com/documents/612/acm/RT-duro

id-6006-6010-laminate-data-sheet

[10] M. V. Schneider, “Microstrip Lines for Microwave Inte-

grated Circuits,” The Bell System Technical Journal, Vol.

48, No. 5, 1969, pp. 1421-1444.

[11] H. A. Wheeler, “Transmission Line Properties of a Strip on

a Dielectric Sheet on a Plane,” IEEE Microwave Theory

and Techniques Transactions, Vol. 25, No. 8, 1977, pp.

631-647. doi:10.1109/TMTT.1977.1129179

[12] K. C. Gupta, et al., “Computer-Aided Design of Microwave

Circuits ,” A rtech H ouse, D edh am , 1 981 , pp. 13 1-134 .