A Ka-Band T/R Chip in 0.15μm PHEMT Technology

Mao, Chenxi; Gao, Yuanci

doi:10.1109/icccs52626.2021.9449295

Cited by 2 publications

(1 citation statement)

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“…Among the GaAs processes, 0.15 μm GaAs pHEMT process has a cut-off frequency of 88 GHz and exhibits reliable performance in previous designed Ka-band circuits [18][19][20]. However, few attempts have been made to adopt this process for circuits beyond 40 GHz due to the performance deterioration and inaccuracy of simulation models.…”

Section: Introductionmentioning

confidence: 99%

A V-Band Integrated Receiver Front-End Based on 0.15 μm GaAs pHEMT Process for Passive Millimeter-Wave Imaging

Gong

Chen

et al. 2022

IEEE Access

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The design, analysis, implementation and measurement of an integrated V-band receiver front-end based on 0.15 μm GaAs pHEMT process are presented in this paper. The front-end chip uses the super-heterodyne topology which consists of a low noise amplifier, an image reject mixer, and a multiplyby-four (×4) LO chain. In order to minimize the power consumed by LO chain, an active single-ended mixer is designed which requires extremely low LO power of -5 dBm. Meanwhile, the effect of signal coupling in the integrated chip is analyzed and solutions are proposed. By introducing appropriate filters into the circuit and optimizing the overall layout, the imbalance of in-phase and quadrature signals caused by unwanted coupling can be effectively mitigated, thus enhancing the image rejection of the chip. Probe and module tests are applied to the receiver front-end, and the measurement results reveal that the chip achieves -3 ± 0.7 dB conversion gain, 7 dB noise figure and more than 25 dB image rejection ratio in the RF frequency range of 52-56 GHz. Only one supply voltage of 3 V is required for the chip, and total power consumption is 312 mW. Moreover, with a continuously adjustable phase control of 360° and very broadband IF characteristics, the front-end chip is suitable for passive millimeter-wave imaging applications.INDEX TERMS Integrated receiver front-end, V-band, low LO power, high image rejection, 0.15 μm GaAs pHEMT, passive millimeter-wave imaging.

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Section: Introductionmentioning

confidence: 99%