TY - JOUR AU - Liu, Chengpeng AU - Zou, Wei AU - Wang, Guoqiang PY - 2013/11/02 Y2 - 2024/03/29 TI - Wideband 5-bit MMIC Digital Attenuator With High Precision JF - International Journal of Recent Contributions from Engineering, Science & IT (iJES) JA - Int. J. Recent Contrib. Eng. Sci. IT VL - 1 IS - 2 SE - Short Papers DO - 10.3991/ijes.v1i2.3258 UR - https://online-journals.org/index.php/i-jes/article/view/3258 SP - pp. 40-43 AB - This paper mainly introduces the Wideband 5-bit MMIC digital attenuator with high precision. Firstly, the theories of basic GaAs digital attenuator MMICâ??s configurations are searched. Secondly, every possible configuration is contrasted, subsequently, appropriate topology is selected for each stage. This attenuator has been realized by 0.5µm GaAs pHEMT process. Simulation results of the digital attenuator has 0.25dB resolution and 7.75dB dynamic attenuation range, Input Voltage Standing Wave Ratio(VSWRIN) was less than 1.55 and Output Voltage Standing Wave Ratio(VSWROUT) was less than 1.6 for all attenuation states, high attenuation accuracy is less than ±0.26dB; insertion loss is less than 1.3dB; The layout of the digital attenuator with a chip size is 0.93 mmÃ?1.45 mm ER -