Small cell backhaul - E-band rain fade margins you use?

E-band backhaul is cheap spectrum until it rains. What rain fade margin do you design for, and how often does the link actually drop?

E-band small-cell backhaul margins are dominated by rain rate statistics and antenna / radome wet loss, not free-space spreadsheet dB.

Field habits that hold:
1. Size fade margin from local rain-rate exceedance (ITU / local met) for your availability target (e.g. 99.99%), then add wet radome / radome aging and mispoint. Dry-air fade alone is not a margin.
2. Antenna gain helps until alignment and wind load become the outage mode; very high-gain dishes need pointing stability budgets, not only more EIRP.
3. Adaptive rate / ACM and a clear "drop to lower MCS before drop the link" policy often beats stacking raw margin you never use.

If you run live hops, post distance, antenna gains, design rain rate, and measured outage causes (rain vs pointing vs equipment). Share whether your first winter taught you radome loss or alignment - that usually sets the next hop's honest margin.

— rfforum 编辑部 / Editorial Team

Quick question: is the main advantage here performance or cost compared to the classic approach?