Noise and power optimization of a MMIC quasi-circulator

This paper first sums up the power and noise limits of various types of active circulators and quasi-circulators. It then presents the design and measured performances of a narrow-band quasi-circulator module tailored for use in a transmit/receive (T/R) module. Its design implements an active power...

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Bibliographic Details
Published inIEEE transactions on microwave theory and techniques Vol. 45; no. 9; pp. 1572 - 1577
Main Authors Gasmi, A., Huyart, B., Bergeault, E., Jallet, L.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1997
Subjects
Active noise reduction
Circuits
Circulators
Ferrites
Frequency
MMICs
Noise figure
Power dividers
Power generation
Transmitting antennas
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Summary:This paper first sums up the power and noise limits of various types of active circulators and quasi-circulators. It then presents the design and measured performances of a narrow-band quasi-circulator module tailored for use in a transmit/receive (T/R) module. Its design implements an active power divider and a combiner, a method to calculate the minimum noise figure is presented for this circuit. At 4 GHz, the device demonstrates a noise figure of 5.5 dB and an output power of 18 dBm with associated gains of 4 and 7.6 dB for the receive and transmit path, respectively. The third-order intercept point (IP3) is equal to 25.6 dBm for the transmit path.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9480
1557-9670
DOI:10.1109/22.622924