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Nice report. I wish beamformer ICs were made for lower frequencies, but everything is targeting X-band and higher.

The new availability of transceiver architecture of RF direct sampling or RF ADC/DAC can work from DC (0 Hz) to high frequency (GHz) is changing the landscape and now you can have beamforming at the lower frequency bands [1].

[1] Radio Architecture Matters: A Review of RF Sampling vs. Zero-IF:

Radio Architecture Matters: A Review of RF Sampling vs. Zero-IF

Here's the missing link to the referenced article:

Radio Architecture Matters: A Review of RF Sampling vs. Zero-IF:

https://www.analog.com/en/technical-articles/radio-architect...

I guess there the digital beamforming is enough for many use cases.

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