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E. G. Cristal and S. Frankel, “Hairpin-Line and Hybrid Hairpin Line/Half-Wave Parallel Coupled Line Filters,” IEEE Transactions on Microwave Theory Techniques, Vol. 20, No. 11, 1972, pp. 719-728. doi:10.1109/TMTT.1972.1127860

has been cited by the following article:

• TITLE: Broadband Miniaturized Bandpass Filter with Circular Stubs for Compact Wireless and Mobile Communication Systems

  AUTHORS: Yulan Zhang, Heather Song

  KEYWORDS: Miniaturized Square Resonator; Bandpass Filter; Circular Stub; Electromagnetic Simulation

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.5 No.3, March 28, 2013

  ABSTRACT: A miniaturized square resonator bandpass filter with circular stubs is designed, fabricated, and characterized. Analytical calculations were carried out to determine the critical filter parameters and the design was optimized using a 3D electromagnetic finite-element solver. The measured results were in good agreement with the designed results. The proposed filter exhibits significant improvement in bandwidth compared to the conventional square resonator bandpass filters.