Here are some internal pictures of a Nokia C021 wireless LAN card. This 802.11 card is based on the Intersil PRISM chipset. Refer to their documentation for a more in-depth analysis.
- Linux and Prism 2 based wireless cards
- PRISM I schematic, sheet 1 (Gzipped PostScript)
- PRISM I schematic, sheet 2 (Gzipped PostScript)
- PRISM I schematic, sheet 3 (Gzipped PostScript)
- PRISM I schematic, sheet 4 (Gzipped PostScript)
- PRISM I schematic, sheet 5 (Gzipped PostScript)
- Parts listing and descriptions for the above schematics (144k PDF)
- Another PRISM1 based wireless network device schematic (129k PDF)
- Samsung wireless card schematics
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 1 (7k PDF)
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 2 (27k PDF)
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 3 (15k PDF)
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 4 (26k PDF)
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 5 (35k PDF)
- D-Link/Gemtek 11 Mbps WLAN USB adapter, schematic 6 (11k PDF)
- NDC/SOHOware NetBlaster II PCI, schematic 1 (34k PDF)
- NDC/SOHOware NetBlaster II PCI, schematic 2 (15k PDF)
- NDC/SOHOware NetBlaster II PCI, schematic 3 (21k PDF)
- NDC/SOHOware NetBlaster II PCI, schematic 4 (27k PDF)
- NDC/SOHOware NetBlaster II access point, schematic 1 No RF section (135k PDF)
- Another NDC access point schematic Includes RF section (432k PDF)
Inside a Nokia C021
Select a picture for larger image.
SMA antenna jack and the Toko TDF2A-2450-T bandpass filter. Also shown are the transmit/receive LEDs. The right section is the RF power amplifiers and receive pre-amplifier sections.
Alternate view. The 6-pin IC sorta in the middle is a NEC UPG152 GaAs MMIC switch. You can tap it's control lines to control an external amplifier.
A little better view.
Shown are the HFA3726 400 MHz quadrature IF modulator/demodulator and the HFA3824 direct sequence spread spectrum baseband processor (small IC upper right) and their support components.
Shown are the HFA3524 dual frequency synthesizer and the associated oscillators and VCOs. Off the to right is the AM79C930 PCnet mobile wireless LAN MAC controller, the 128k flash RAM and the 32k SRAM.
A picture.
Another picture.
Inside a SOHOware NCP130
Antenna connector. Reverse polarity SMA connector. Diversity antenna switching is done by applying the DC control voltage via the coax to the included external diversity antenna.
UPG152TA TX/RX switch and the bandpass filter.
RF power amplifier, standard PRISM2 based hardware.
Return to the Low Cost Wireless Network How-To