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You build them using PI or T configuration with chip resistors. Accuracy will be less at 7 GHz due to parasitics, but it works fine. I've built PI type attenuators using 0505 chip resistors at 10 GHz. If I remember right, a 3 dB attenuator gave around 3.5-4 dB attenuation @ 10 GHz and return loss about 14-15 dB. See
Actually resistive Pi or Tee network can be used up to 10 GHz with normal resistor with degradation of convergence in calculation and measurement at higher frequency. I have uploaded a free software for you. You can specify the input/output port impedance and power, it will compute the required resistor value for Pi or Tee network. Cheers~
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