Post by Admin on Nov 1, 2019 18:37:19 GMT -5
The National Interest
Chinese scientists say they have solved a fundamental dilemma inherent to radar. High-frequency radars, such as microwave radars, emit a lot of short pulses that are good for guiding weapons to a target. Low-frequency radars, that emit waves that are meters long, are better for searching an area but aren’t precise enough for fire control (here’s a quick primer). That means high- and low-frequency radars tend to be paired for search and fire control.
Stealth aircraft are shaped to avoid detection by high-frequency beams. “Meter wave radars can detect stealth aircraft because modern stealth aircraft are mainly designed to avoid detection by microwave radar, and are less stealthy to meter wave radar,” said Global Times. “However, analysts previously said that because of their low resolution and accuracy, meter wave radars can only send warnings about incoming threats. And even if microwave radars compensate for the shortcomings of the meter wave radars, they are unable to entirely overcome these shortcomings.”
Wu Jianqi, a senior scientist at the state-owned China Electronics Technology Group Corporation, told Chinese media that his team has solved this dilemma. “Wu solved the issue by designing the world's first practical meter wave sparse array synthetic impulse and aperture radar,” according to Global Times. “Wu said that his radar has multiple transmitting and receiving antennas tens of meters high, scattered in a range of tens to hundreds of meters. They can continuously cover the sky as the radar receives echoes from all directions.”
Chinese scientists say they have solved a fundamental dilemma inherent to radar. High-frequency radars, such as microwave radars, emit a lot of short pulses that are good for guiding weapons to a target. Low-frequency radars, that emit waves that are meters long, are better for searching an area but aren’t precise enough for fire control (here’s a quick primer). That means high- and low-frequency radars tend to be paired for search and fire control.
Stealth aircraft are shaped to avoid detection by high-frequency beams. “Meter wave radars can detect stealth aircraft because modern stealth aircraft are mainly designed to avoid detection by microwave radar, and are less stealthy to meter wave radar,” said Global Times. “However, analysts previously said that because of their low resolution and accuracy, meter wave radars can only send warnings about incoming threats. And even if microwave radars compensate for the shortcomings of the meter wave radars, they are unable to entirely overcome these shortcomings.”
Wu Jianqi, a senior scientist at the state-owned China Electronics Technology Group Corporation, told Chinese media that his team has solved this dilemma. “Wu solved the issue by designing the world's first practical meter wave sparse array synthetic impulse and aperture radar,” according to Global Times. “Wu said that his radar has multiple transmitting and receiving antennas tens of meters high, scattered in a range of tens to hundreds of meters. They can continuously cover the sky as the radar receives echoes from all directions.”