Microwave solid-state amplifiers and microwave assemblies/modules containing microwave solid-state amplifiers that are any of the following: (a) Rated for operation at frequencies exceeding 2,7 GHz up to and including 6,8 GHz with a ‘fractional bandwidth’ of greater than 15 % and having any of the following: 1. A peak saturated power output greater than 500 W (57 dBm) at any frequency exceeding 2,7 GHz up to and including 2,9 GHz; 2. A peak saturated power output greater than 270 W (54,3 dBm) at any frequency exceeding 2,9 GHz up to and including 3,2 GHz; 3. A peak saturated power output greater than 200 W (53 dBm) at any frequency exceeding 3,2 GHz up to and including 3,7 GHz; or 4. A peak saturated power output greater than 90 W (49,54 dBm) at any frequency exceeding 3,7 GHz up to and including 6,8 GHz; (b) Rated for operation at frequencies greater than 6,8 GHz up to and including 31,8 GHz with a ‘fractional bandwidth’ of greater than 10 % and having any of the following: 1. A peak saturated power output greater than 70 W (48,54 dBm) at any frequency exceeding 6,8 GHz up to and including 8,5 GHz; 2. A peak saturated power output greater than 50 W (47 dBm) at any frequency exceeding 8,5 GHz up to and including 12 GHz; 3. A peak saturated power output greater than 30 W (44,77 dBm) at any frequency exceeding 12 GHz up to and including 16 GHz; or 4. A peak saturated power output greater than 20 W (43 dBm) at any frequency exceeding 16 GHz up to and including 31,8 GHz; (c) Rated for operation with a peak saturated power output greater than 0,5 W (27 dBm) at any frequency exceeding 31,8 GHz up to and including 37 GHz; (d) Rated for operation with a peak saturated power output greater than 2 W (33 dBm) at any frequency exceeding 37 GHz up to and including 43,5 GHz, and with a ‘fractional bandwidth’ of greater than 10 %; (e) Rated for operation at frequencies exceeding 43,5 GHz and having any of the following: 1. A peak saturated power output greater than 0,2 W (23 dBm) at any frequency exceeding 43,5 GHz up to and including 75 GHz, and with a ‘fractional bandwidth’ of greater than 10 %; 2. A peak saturated power output greater than 20 mW (13 dBm) at any frequency exceeding 75 GHz up to and including 90 GHz, and with a ‘fractional bandwidth’ of greater than 5 %; or 3. A peak saturated power output greater than 0,1 nW (- 70 dBm) at any frequency exceeding 90 GHz; Note : The status of an item whose rated operating frequency includes frequencies listed in more than one frequency range is determined by the lowest peak saturated power output threshold.