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Compact hexagonal open-loop resonator bandpass filters using capacitive side-coupled stub and spurline technique

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3 Author(s)
Liu, H. ; Univ. of Electron. Sci. & Technol. of China, Chengdu ; Li, W. ; Yang, Y.

Compact quasi-elliptic bandpass filters using hexagonal open-loop resonators are presented. To miniaturise circuit size, a pair of capacitive side-coupled stubs and two pairs of spurlines are placed skilfully into the filter structure. The new filter operating at 1.65 GHz was analysed, simulated and fabricated. Good agreement between simulations and measurements verified the validity of the methodology. Moreover, the circuit size only occupies 21.1 14.1 mm2 (sime0.21lambdag times 0.14 lambdag).

Published in:

Electronics Letters  (Volume:44 ,  Issue: 19 )