[SOLVED] Can the antenna spot the oscillation of cmos LC VCO?

[jwonoh]

Hi all.

I've got to know whether the fabricated V-band (around 60GHz) VCO oscillates or not.

However, the on-chip probing is not supported.
Instead, I'm utilizing the antenna which has a gain about 20dB to detect V-band tone.

First, I connected the antenna to the spectrum with adequate equipment to support V-band and its operation is confirmed since it noticed the 60GHz signal source.
And then the power is supplied to the VCO and I placed the antenna above the chip which includes VCO to detect the VCO tone.
However, I failed to detect the VCO tone from it and I'm not convinced that this situation indicates the VCO doesn't work. I want to hear your opinion about it.

Can the antenna spot the oscillation of VCO? The VCO is fabricated in the CMOS process and the type is LC.

Thanks,

 

[vfone]

At this high mmWave frequency, definitely you should pick-up some signal if the VCO is working.