Fig. 1. “T” shape anode of GaAs SBD: (a) schematic picture with C_jp and C_j0; (b) SEM picture of 0.5 μm anode metal section.

Fig. 2. Characteristics of “T” shape anode GaAs SBD with different anode size: (a)C_j0, C_jp and 1/R_s versus anode area; (b)f_t versus anode diameter.

Fig. 3. GaAs membrane sub harmonic mixer design: (a) 3D design diagram; (b) microscope picture of the finished mixer.

Fig. 4. Pictures of 664GHz receiver (a) and measurement setup (b)

Fig. 5. Measured and simulated DSB conversion loss of the membrane mixer