Two microwave logarithmic amplifier designs are described. The first is a dual channel extended dynamic range detector logarithmic video amplifier (DLVA) design to cover the 2-18-GHz frequency band. The DLVA was developed to achieve state-of-the-art accuracy over a 65-dB dynamic range, while providing excellent amplitude and phase tracking between the two channels. Amplitude and phase tracking of +or-1 dB and +or-5 degrees , respectively, have been achieved. The second is a successive detection logarithmic amplifier (SDLA) design to cover the 2-6-GHz frequency range. The SDLA was developed to achieve state-of-the-art pulse processing capability. A risetime of 8 ns and a recovery time of 30 ns have been achieved over 70 dB of dynamic range. >