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Miniaturized hairpin resonator filters and their application to receiver front-end MICs

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3 Author(s)
Sagawa, M. ; Matsushita Electr. Ind. Co. Ltd., Kawasaki, Japan ; Takahashi, K. ; Makimoto, Mitsuo

The authors describe the fundamental characteristics of miniaturized hairpin resonators having parallel coupled lines and show their applications to bandpass filters and receiver front-end microwave integrated circuits (MICs). A method for calculating filter coupling parameters using a general-purpose microwave circuit simulator is presented. The bandpass filters have a suitable structure for MICs, and their size is one-half that of conventional hairpin resonators without increasing insertion losses. Trial receiver front-end MICs using these filters have been developed and have shown good characteristics such as low noise and a high image suppression ratio. They are applicable to a frequency range above the L-band

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:37 ,  Issue: 12 )