Planar Monolithics (PMI) Model PE2-15-5R06R0-3R5-21-12-SFF is a 5 to 6 GHz Low Noise Amplifier designed for military and industrial applications. That provides 15 dB of gain and 19 dBm P1dB while maintaining a maximum gain flatness of ±0.5 dB and a typical noise figure of 3.5 dB. Supplied in our PE2 housing measuring 1.08" x 0.71" x 0.26" and can be used as an SMA connectorized or surface mounted component.  https://www.pmi-rf.com/product-details/pe2-15-5r06r0-3r5-21-12-sff