A fully integrated low noise amplifier( LNA) for WLAN 802. 11 ac is presented in this article.A cascode topology combining BJT and MOS transistor is used for better performance. An inductive source degeneration is cho...A fully integrated low noise amplifier( LNA) for WLAN 802. 11 ac is presented in this article.A cascode topology combining BJT and MOS transistor is used for better performance. An inductive source degeneration is chosen to get 50 Ohm impedance matching at the input. The noise contribution of common gate transistor is analyzed for the first time. The designed LNA is verified with IBM silicon-germanium(SiGe ) 0. 13μm BiCMOS process. The measured results show that the designed LNA has the gain of 13 dB and NF of 2. 8 dB at the center frequency of 5. 5 GHz. The input reflection S11 and output reflection S22 are equal to-19 dB and-11 dB respectively. The P-1 dB and IIP3 are-8. 9 dBm and 6. 6 dBm for the linearity performance respectively. The power consumption is only 1. 3 mW under the 1. 2 V supply. LNA achieves high gain,low noise,and high linearity performance,allowing it to be used for the WLAN 802. 11 ac applications.展开更多
The construction and shape of UUVs are described in the paper. UUV design is the shape of the overall design of unmanned underwater vehicle should first be resolved UUV underwater vehicle directly affects the shape of...The construction and shape of UUVs are described in the paper. UUV design is the shape of the overall design of unmanned underwater vehicle should first be resolved UUV underwater vehicle directly affects the shape of the resistance and noise, which is related to energy, payload, maneuverability and concealment UUV problem The main characteristic and parameter tables for foreign torpedo shape, fiat shape and anomalous shape are also given in the paper. The general layout of typical foreign UUVs is analyzed in detail. And the total layout figure and interior constructive figure are introduced. Torpedo-type because of its good water power and low noise, no one has been the main form of underwater vehicle-like, and many designers are now highly favored because of its stable performance, anti-environmental interference capability. Other irregular shapes designed primarily for the completion of a specific task, according to the specific environment and mission requirements. According to comparing and summarizing, some suggestions and conclusions are oresented.展开更多
基金Supported by the National Natural Science Foundation of China(No.61534003)
文摘A fully integrated low noise amplifier( LNA) for WLAN 802. 11 ac is presented in this article.A cascode topology combining BJT and MOS transistor is used for better performance. An inductive source degeneration is chosen to get 50 Ohm impedance matching at the input. The noise contribution of common gate transistor is analyzed for the first time. The designed LNA is verified with IBM silicon-germanium(SiGe ) 0. 13μm BiCMOS process. The measured results show that the designed LNA has the gain of 13 dB and NF of 2. 8 dB at the center frequency of 5. 5 GHz. The input reflection S11 and output reflection S22 are equal to-19 dB and-11 dB respectively. The P-1 dB and IIP3 are-8. 9 dBm and 6. 6 dBm for the linearity performance respectively. The power consumption is only 1. 3 mW under the 1. 2 V supply. LNA achieves high gain,low noise,and high linearity performance,allowing it to be used for the WLAN 802. 11 ac applications.
文摘The construction and shape of UUVs are described in the paper. UUV design is the shape of the overall design of unmanned underwater vehicle should first be resolved UUV underwater vehicle directly affects the shape of the resistance and noise, which is related to energy, payload, maneuverability and concealment UUV problem The main characteristic and parameter tables for foreign torpedo shape, fiat shape and anomalous shape are also given in the paper. The general layout of typical foreign UUVs is analyzed in detail. And the total layout figure and interior constructive figure are introduced. Torpedo-type because of its good water power and low noise, no one has been the main form of underwater vehicle-like, and many designers are now highly favored because of its stable performance, anti-environmental interference capability. Other irregular shapes designed primarily for the completion of a specific task, according to the specific environment and mission requirements. According to comparing and summarizing, some suggestions and conclusions are oresented.