An L-band SiGe HBT active differential equalizer with variable positive/negative gain slopes using parallel RC circuits

Itoh, Yasushi; Takagi, Hiroaki; Xiaole, Weng; Omokawa, Shiori

doi:10.1109/apmc.2017.8251596

Cited by 2 publications

(2 citation statements)

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“…Although [9] has a high tunability range, it consumes high power which makes this design impractical for phased array applications. In [10], high tunability range with gain is achieved. However, due to the large value of the passive components, this design cannot be realized onchip applications.…”

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

“…In order to handle the amplitude behavior of the systems, [8] offers a solution to flatten the output gain of travelling wave tube amplifiers. In [9], [10], an active gain equalizer is employed to obtain variable tunability and flatten the gain behavior of the systems. However, since these designs offer off-chip solutions, they cannot be used in the phased array applications.…”

Section: Introductionmentioning

confidence: 99%

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A Tunable SiGe BiCMOS Gain-Equalizer For X-Band Phased-Array RADAR Applications

Turkmen

Burak

Ozkan

et al. 2019

IEEE Trans. Circuits Syst. II

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This paper presents a compact-size tunable gainequalizer for X-Band Phased-Array RADAR applications in a 0.25µm SiGe BiCMOS technology. An isolated NMOS based variable resistance was used for the first time to tune the slope of the gain-equalizer. For NMOS, an isolated body created by a deep n-well was utilized to reduce insertion loss due to the substrate conductivity. Furthermore, the power-handling capability of the tunable gain-equalizer was improved thanks to the resistive bodyfloating technique. The designed tunable gain-equalizer operates in the frequency range from 8 to 12.5 GHz with a measured positive slope of 1 dB/GHz and 1 dB tunable slope. The effective chip area excluding the pads is 0.21 mm 2 , and the total area including pads is 0.31 mm 2. To authors best knowledge, this study is the first tunable gain-equalizer in SiGe technology presented for X-band phased-array RADAR applications.

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Section: Simulation and Measurement Resultsmentioning

confidence: 99%