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A wideband high sensitivity microwave receiver operating within 0.5 to 19.5 GHz and providing a 1.1-GHz instantaneous bandwidth is described. The receiver shows a noise figure as low as 10 dB and the input third-order intercept point up to 10 dBm as well. Also, the receiver is characterized by a low spurious response and extremely low residual phase noise too. Essential design principles of the receiver are given and discussed.