Title :
Lumped lossy circuit synthesis and its application in broad-band FET amplifier design in MMICs
Author :
Zhu, Lizhong ; Sheng, Chuyu ; Wu Boxiu
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
fDate :
9/1/1989 12:00:00 AM
Abstract :
A lumped lossy circuit is synthesized by means of the transformation introduced by L. Zhu et al. (ibid., vol.36, no.12, p.1614-20, Dec. 1988). The circuit contains two different kinds of lossy branches that include arbitrary nonuniform reactive resistors as well as lossy inductors and capacitors. This approach can be used to synthesize a lumped lossy matching network more flexibly than previous techniques. An example is presented to show the application of the synthesis of the lumped lossy matching networks for compensating the device gain roll-off with frequency in the design of a broadband monolithic microwave integrated FET amplifier. The advantages of the technique are seen by comparison with the amplifier designed by Zhu et al
Keywords :
MMIC; circuit CAD; impedance matching; linear integrated circuits; linear network synthesis; lumped parameter networks; microwave amplifiers; passive networks; wideband amplifiers; CAD; FET amplifier design; arbitrary nonuniform reactive resistors; broadband; circuit synthesis; computer-aided synthesis; lossy capacitors; lossy inductors; lossy matching network; lumped lossy circuit; transformation; wideband MMIC amplifier; Broadband amplifiers; Capacitors; Circuit synthesis; Frequency synthesizers; Inductors; Integrated circuit synthesis; Microwave FETs; Microwave devices; Network synthesis; Resistors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
