Marques, M. G. ; Tam, K. W. ; Caldinhas Vaz, J. ; Costa Freire, J.
(1999)
MMIC lumped and transversal filter with LC tuned amplifiers.
In: Gallium Arsenide Applications Symposium. GAAS 1999, 4-5 October 1999, Bologna, Italy.
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Abstract
This paper presents a modular approach for the design of MMIC lumped and transversal filter with LC tuned amplifiers. The filtering improvement due to the introduction of LC tuned amplifier modules (LCTAM) as the transversal element on the conventional lumped and transversal structure is illustrated by comparing the performances of a single LCTAM and double LCTAM filters with a conventional one. In order to demonstrate the novel filter usefulness three filters with two transversal sections were implemented with the same typical 0.5 um GaAs MMIC technology (a conventional, a single and a double LCTAM). It is shown that when we increase the number of LCTAM the rejection increases, however the chip area and complexity also increase. For a 1.54GHz centre frequency filter, a good compromise is the double LCTAM. This solution on the lower stop band (-250MHz) has 15dB more attenuation than the other two filters and on the upper stop band (+250MHz) has 17dB and 20dB more attenuation than the single LCTAM or conventional filter topology, respectively.
Abstract
This paper presents a modular approach for the design of MMIC lumped and transversal filter with LC tuned amplifiers. The filtering improvement due to the introduction of LC tuned amplifier modules (LCTAM) as the transversal element on the conventional lumped and transversal structure is illustrated by comparing the performances of a single LCTAM and double LCTAM filters with a conventional one. In order to demonstrate the novel filter usefulness three filters with two transversal sections were implemented with the same typical 0.5 um GaAs MMIC technology (a conventional, a single and a double LCTAM). It is shown that when we increase the number of LCTAM the rejection increases, however the chip area and complexity also increase. For a 1.54GHz centre frequency filter, a good compromise is the double LCTAM. This solution on the lower stop band (-250MHz) has 15dB more attenuation than the other two filters and on the upper stop band (+250MHz) has 17dB and 20dB more attenuation than the single LCTAM or conventional filter topology, respectively.
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(Paper)
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DOI
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16 Jan 2006
Last modified
17 Feb 2016 14:26
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Document type
Conference or Workshop Item
(Paper)
Creators
Subjects
DOI
Deposit date
16 Jan 2006
Last modified
17 Feb 2016 14:26
URI
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