Side by side
| AIC8800-D40 | AIC8800-D80 | RTL8812CU | |
|---|---|---|---|
| Range tier | Short range | Mid range (default) | Long range |
| Line-of-sight reference | 30 – 100 m | 100 – 300 m | 300 – 1000 m |
| Antennas | Single antenna (1T1R) | Single antenna (1T1R) | Dual antenna (2T2R MIMO) |
| Antenna positions on carrier | 1 | 1 | 2 |
| Max resolution | Set by the video module; 4K60 models run 4K60 | Set by the video module; 4K60 models run 4K60 | Set by the video module; 4K60 models run 4K60 |
| Characteristics | Lowest cost and power | Default for most projects | Higher output power and sensitivity, better penetration |
| Typical uses | Same room to next room: shared-office dongles, rear-seat displays, meeting-room casting | Across rooms and floors: presentation, KVM, signage | Outdoor and mobile: drones, inspection vehicles, stage events |
Key differences
Range does not affect resolution
A setup has two parts: the video module sets resolution (4K30 or 4K60), and the Wi-Fi module sets range. The long-range tier does not force a drop to 1080p, and a short link does not need a costlier module for better picture. Deciding the two separately avoids most selection mistakes.
RTL8812CU needs two antennas
D40 and D80 are single-antenna 1T1R, so one antenna position is enough. RTL8812CU is dual-antenna 2T2R, and both the carrier and the enclosure need room and routing for two antennas. Switching to 8812CU on a single-antenna carrier means revising the board and the mechanics. If distance is still open, reserve two positions from the start.
Rated distances assume line of sight
All three distances are line-of-sight references. Real range depends on antenna placement, obstructions and co-channel interference; concrete walls, lift shafts and metal shelving all cut it down. Testing an ATE946X-KIT at the real site before production is more reliable than reading the table.
Changing tiers needs no firmware change
Carrier and firmware are shared across the three tiers, so changing the Wi-Fi module changes the range. One product can ship in short, mid and long-range versions as long as the carrier reserves up to two antennas.
Which one to pick
If the source and screen are in the same or the next room, such as meeting-room casting or rear-seat displays
AIC8800-D40, 30 – 100 mIf the link crosses rooms or floors, such as presentation, KVM or digital signage
AIC8800-D80, 100 – 300 mIf the use is outdoor or mobile over long distances: drones, inspection vehicles, stages
RTL8812CU, 300 – 1000 m, with two antenna positions on the carrier