BCM4319 Preliminary Data Sheet
WLAN 802.11 Radio Subsystem
Section 7:WLAN 802.11 Radio Subsystem
The BCM4319 includes an integrated dual-band WLAN RF transceiver that has been optimized to provide low
power, low cost, and robust communications for applications operating in the globally available 2.4 GHz
unlicensed ISM or 5 GHz U-NII bands (but not both simultaneously). With its integrated internal transmit power
amplifiers, it provides full output power per the IEEE 802.11a/b/g/n specifications. Support for optional external
power amplifiers is also provided. The transmit and receive sections include on-chip filtering, mixing, and gain
control functions.
Figure 17: Radio Functional Block Diagram
5 GHz
RF Input
Phase
Shifter
LNA
Rx I
LPF
LPF
To Baseband
5 GHz
RF Input
Phase
Shifter
LNA
LNA
MUX
Rx Q
2.4 GHz
RF Input
Phase
Shifter
2.4 GHz
RF Input
Phase
Shifter
LNA
5 GHz
2.4 GHz
2.4 GHz
Reference
Clock
LO
Generation
PLL
5 GHz
5 GHz
RF Output
Tx I
LPF
LPF
AMP
From Baseband
Tx Q
MUX
2.4 GHz
RF Output
AMP
Control Interface
Calibration
Control Interface
Broadcom®
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 42
April 2, 2014 • 4319-DS05-R
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