Hello, I have a need to make radiated measurements up to 40 GHz. I uses a low loss cable that gives me enough dynamic range up to 18GHz. The cable is very short and I have to move my measurements equipment out to the antenna. I know I need to get a pre-amp and mixer, but what do I do about the cable loss? I have called many places and I cannot find good enough cable to measure to 40 GHz. The other alternative is waveguides as I understand. Those would, I assume, be coupled directly to the input of the mixer. This does not allow for antenna height adjustments form 1 to 4m as required. I have seen other test reports where high frequency data was taken where the antenna was held at about 1meter. I can understand this since emissions will likely be very directional at those frequencies. Is it acceptable to make measurements with the receive antenna at 1 meter only?
Thanks for any information you can provide… Wiz
