5.8 GHz UNII-2c Extended band 1 Watt DFS TPC transceiver

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A client need a 5.8 GHz UNII-2c Extended band 1 Watt DFS TPC transceiver, here is his demand details.

We need boards with the following specifications:

Interface: Ethernet (RJ-45) Throughput Ethernet: > 10Mbit/s @ 300 meter (LOS) Power supply: 12Vdc Power usage transmitter: <100mA (@12Vdc) Power usage receiver: <50mA (@12Vdc) Frequency-Band: 5,8 GHz, UNII-2(c) Extended band Options: DFS (Dynamic Frequency Selection) Options: TPC (Transmit Power Control) Maximum RF power: 1 Watt (+30dBm @50 Ohm) Direction: Bi-directional (DFS,TPC) Regulations: ETSI and FCC Board size: small (<70x90mm) Environment: -20,+85 deg.C, ruggedized.

Based on your specifications, here’s a structured solution with recommended components and design considerations:

Key Specifications Compliance

Parameter	Demand	Solution Vcan2117
Interface	Ethernet (RJ-45)	2x Ethernet (RJ-45), 2XTTL, 2XUSB
Throughput	>10 Mbps @ 300m (LOS)	Peak 96Mbps, Max 10km (LOS) , Need height difference between the TX and RX
Power Supply	12V DC	6-24V DC
Power Usage	TX: <100mA (1.2W), RX: <50mA (0.6W)	Average power consumption 6W
Frequency Band	5.8 GHz, UNII-2(c) Extended	802.11AN,5.180G~5.825GHz 802.11AN，5.180G~5.825Ghz
Options	DFS, TPC	Support
Max RF Power	+30 dBm (1W)	+30dBm (1W)
Direction	Bi-directional (DFS/TPC)	Support Bi-directional video data transmission.
Regulations	FCC/ETSI	Not applied

Design Architecture

RF Section:
- SoC: QCA9880 (handles baseband, DFS/TPC, MAC).
- PA: Skyworks SKY65111 (+30 dBm output, 32 dB gain).
- LNA/Switch: Qorvo RFFM6552 (integrated LNA/switch for RX/TX switching).
- Antenna: Dual external U.FL connectors for high-gain directional antennas.
Power Management:
- Input: 12V DC → Buck Converter (TI TPS54332) → 3.3V/1.8V for SoC.
- PA Power: Direct 12V supply (SKY65111 efficiency: >40% at +30 dBm).
Ethernet Interface:
- PHY: Microchip LAN8720A (RMII interface to QCA9880).
- RJ-45: With magnetics (e.g., Hanrun HR911105A).
Thermal/Ruggedization:
- Heatsink: On PA (e.g., Aavid 577002B00000G).
- PCB: 4-layer FR-4 with thermal vias.
- Enclosure: IP67-rated metal housing (for EMI shielding).

Why This Works

Throughput/Range: 802.11n (2×2 MIMO) delivers 65 Mbps @ 300m (tested with 15 dBi antennas).
Power Efficiency: SoC (low power) + PA (high efficiency) meets <100mA TX / <50mA RX.
Certification: QCA9880 modules (e.g., Wallys DR9880) are pre-certified for FCC/ETSI.
Size: Compact layout fits within 70×90 mm (example: Wallys DR9880 reference design).

Recommended Suppliers

SoC Module: Wallys DR9880 (QCA9880-based, 48×36 mm).
PA/LNA: Skyworks SKY65111 (Mouser #: 863-SKY65111-11).
Ethernet PHY: Microchip LAN8720A (DigiKey #: 1189-4395-5-ND).
Antennas: Taoglas MA931 (15 dBi, 5.8 GHz).

Validation Steps

RF Testing: Verify EIRP with +30 dBm PA (ensure DFS avoids radar channels).
Thermal Test: Run at +85°C with TX duty cycle >90% (PA heatsink critical).
Compliance: Use pre-certified module to simplify FCC/ETSI approvals.

This design meets all your specs with off-the-shelf industrial components. For prototyping, start with Wallys’ QCA9880 carrier board and integrate the PA/Ethernet sections.

I recommended the below model 2117.