Other Parts Discussed in Thread: IWR1843,
Tool/software:
Hello TI Radar team,
I have applied TI’s standard boresight/phase-gain calibration and internal loop-back procedures to single-chip AWR2243 (also testing IWR1843) modules.
Even after this calibration, a single corner-reflector target at boresight still shows a residual ±2 – 3 deg bias in my beam-pattern based angle-of-arrival (DoA) estimates.
Schmid et al., “On the Effects of Calibration Errors and Mutual Coupling on the Beam Pattern of an Antenna Array,” IEEE T-APS, 2013 models this bias as a consequence of channel-to-channel phase and gain errors (Δ) plus mutual coupling, and derives worst-case and statistical limits on beam-pattern distortion.
I would like to repeat that analysis with realistic Δ_{max} value for AWR2243 / IWR1843, so I can compute the worst-case:
- main-lobe shift
- side-lobe level (SLL) rise
Information requested
- Channel-to-channel phase mismatch (Δφ, degrees)
- Maximum and typical peak-to-peak values for RX-RX, TX-TX, and TX-RX paths.
- Channel-to-channel gain mismatch (Δα, dB)
- Whether the above specifications apply to a single-chip board only, or also hold for 4-chip cascade configurations.
- References (data-sheet page, application note, test report)
- If no official figure exists, any conservative design numbers TI recommends (e.g., ±5°, ±0.5 dB) would be very helpful.
Thank you in advance for any guidance or document links!
Best regards,
Harin Lee
