Science Daily  June 25, 2021 Backscatter radio is typically limited to data rates of hundreds of megabits per second because of the low frequency bands used and the modulation techniques involved. An international team of researchers (USA – industry, Georgia Institute of Technology, UK) designed and demonstrated a millimetre-wave modulator and antenna array for backscatter communications at gigabit data rates. It consists of a microstrip patch antenna array and a single pseudomorphic high-electron-mobility transistor that supports a range of modulation formats including binary phase shift keying, quadrature phase shift keying and quadrature amplitude modulation. The circuit is additively manufactured with […]