Power Supply and Control signals filtering/ bypassing for RF chip

[cjrathi]

Hi,

In the design , I am using RF chip, whose operation is controlled through control signals. The frequency of operation is from 2GHz to 6GHz.

I don't want any high frequency spikes/noise to get in to those control pins and Vcc, because it may affect its performance.

Please suggest me how should I achieve it.

If I decide to use LC filter, what should be its values should I select. I want only pure DC signal to pass.

Thanks
CR

 

[FvM]

I would primarly think about "GHz" type chip ferrites, 300 to 600 ohm range, one for each control line. The same or possibly lower impedance ferrites can be used in combination with bypass capcitor for supply voltages.

 

[cjrathi]

- - - Updated - - -

I would primarly think about "GHz" type chip ferrites, 300 to 600 ohm range, one for each control line. The same or possibly lower impedance ferrites can be used in combination with bypass capcitor for supply voltages.

ferrite beads at 300 to 600 ohm .. ok.. but at what frequency ? Could you please specify ?

Thanks
CR

 

[FvM]

By convention, ferrite bead impedances are specified at 100 MHz. You'll understand, if you review actual datasheets.

You should take a look at Murata "GHz" BLMxxH and "High-GHz" BLMxxG series.

 

[cjrathi]

By convention, ferrite bead impedances are specified at 100 MHz. You'll understand, if you review actual datasheets.

You should take a look at Murata "GHz" BLMxxH and "High-GHz" BLMxxG series.

Thanks.. I'll look at it..