A 4-GHz Multistage Transistor Amplifier

A 4-GHz Multistage Transistor Amplifier

Multistage microwave transistor amplifiers of simple construction have been developed. In these amplifiers, unit amplifiers of the same design are connected in cascade with short transmission lines inserted between each amplifier. The n-stage (three-, four-, five-, six-, and seven-stage) amplifiers...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 1969-12, Vol.17 (12), p.1072-1077
Hauptverfasser: Ayaki, K., Igarashi, E., Kajiwara, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Bandwidth
Circuit noise
Distributed parameter circuits
Impedance matching
Isolators
Microwave amplifiers
Microwave transistors
Power amplifiers
Power transmission lines
Stripline
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Zusammenfassung:Multistage microwave transistor amplifiers of simple construction have been developed. In these amplifiers, unit amplifiers of the same design are connected in cascade with short transmission lines inserted between each amplifier. The n-stage (three-, four-, five-, six-, and seven-stage) amplifiers designed for the 4-GHz band gave power gains n times that of the unit amplifier (4 dB) and flat bandwidths of about 1000 MHz. The stripline circuit of the amplifier is fabricated on alumina substrates in the usual way. The amplifier has the disadvantage of poor input and output impedance matching. However, this problem was solved by integrating isolators in the input and output ports of the multistage amplifier. Noise performance of the amplifier is also described.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.1969.1127103