There are 30 chips for each kind of chip. Hong-Wen and I will go Nobeyama this weekend to fabricate the modified 650GHz mixer. Typical output power after 2.5dB insertion loss by Isolator is 9 to14dBm. Power dip of H295 is located at 78GHz, and for H305 is located at 77GHz, below the power dip the oscillator still has quite high power output but shows mode jump. Strange behavior at high frequency edge did not show during this test.
Further investigation is required to find the mechanism.