PIER Letters
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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By E. A. Ogbodo, Y. Wang, and K. S. K. Yeo

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Coupled resonators are widely used in the design of cross-coupled filters with dual-passband response and the quasi-elliptic function characteristics. In this paper, we will present a dual-band bandpass filter using only couplings between adjacent resonators, i.e. without cross-couplings. The dual-band bandpass filter with passband centre frequencies of 1747 MHz and 1880 MHz respectively is designed and fabricated using microstrip U-shaped resonators. Using coupled resonator pair as a dual-band cluster, a miniaturised structure is achieved as compared to the conventional topology. The measured responses agree closely with the simulations.

E. A. Ogbodo, Y. Wang, and K. S. K. Yeo, "Microstrip Dual-Band Bandpass Filter Using U-Shaped Resonators," Progress In Electromagnetics Research Letters, Vol. 59, 1-6, 2016.

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