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As I mentioned above, the WLAN module is wired right on the router’s main PCB. It is based on two chips. One is a BCM4318 802.11b/g transceiver from Broadcom.

Here is its specification:

Interface

PCI, SDIO/SPI

System Bus Support

PCI, CardBus, CompactFlash, EBI

Standard

IEEE 802.11g

Data Rate

802.11g:54, 48, 36,24, 18, 12, 9, 6 Mb/s;
802.11b; 11, 5.5, 2, 1 Mb/s

Modulation

OFDM,CCK,DQPSK,DBPSK

Network Architectures

Infrastructure, Ad Hoc

Operating Frequencies

2.4-2.497GHz

Operating Channels

11-North America,13-Europe, 14-Japan

RF Output Power

20dB max

Antenna Connectors

Hardware diversity support – Transmit and Receive

Power Requirements

1.8V(3.3V for ref design)

Power Consumption

Average Standby <20 mW

Security

WEP; WEP2; WPA, WPA2; TKIP; Weak-key avoidance;
CCX, CCX2.0; 128-bit OCB mode AES,802.11i

Dimensions

12x12mm 196-pin, 10x10mm 144-pin

Software Support

Microsoft WHQL certified for Windows XP/2000/Me/WindowsSE.
Embedded drivers for Linux and VxWorks.

Certifications

IEEE 802.11 compliant; Wi-Fi CERTIFIED;
ACPI power management

The controller supports Afterburner, but it is largely a pretty marketing name. There is little use from this technology in practice.

And finally, the router’s got a 12LP14A signal amplifier from Silicon Storage Technology.

Its characteristics are as follows:

  • High Gain:
    • Typically 30 dB gain across 2.4~2.5 GHz over temperature 0°C to +80°C
  • High linear output power:
    • >26.5 dBm P1dB
    • Meets 802.11g OFDM ACPR requirement up to 23 dBm
    • Added EVM ~4% up to 20 dBm for 54 Mbps 802.11g signal
    • Meets 802.11b ACPR requirement up to 24 dBm
  • High power-added efficiency/Low operating current for both 802.11g/b applications
    • ~22% @ POUT = 22 dBm for 802.11g
    • ~26% @ POUT = 23.5 dBm for 802.11b
  • Built-in Ultra-low IREF power-up/down control
    • IREF <4 mA
  • Low idle current
    • ~60 mA ICQ
  • High-speed power-up/down
    • Turn on/off time (10%~90%) <100 ns
    • Typical power-up/down delay with driver delay included <200 ns
  • High temperature stability
    • ~1 dB gain/power variation between 0°C to +80°C
    • ~1 dB detector variation over 0°C to +80°C
  • Low shut-down current (< 0.1 µA)
  • On-chip power detection
  • 25 dB dynamic range on-chip power detection
  • Simple input/output matching
  • Packages available
    • 16-contact VQFN (3mm x 3mm)
    • Non-Pb (lead-free) packages available

The external antenna connector is linked to the wireless module with a special route on the PCB rather than with a cable as usual. The connector itself looks imposingly:

Besides the external antenna, the router has an internal planar IF antenna. It is located near the edge of the PCB.

 
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