AD6640

–23–

REV. A

AD6640

COMMON LO

ANTENNA 1

EIGHT WIDEBAND FRONT ENDS

AD6620 (1)

SYNC 1

ANTENNA 2

AD6620s (32 CHANNELS)

AD6640

AD6640

ANTENNA 3

ANTENNA 4

AD6620s (32 CHANNELS)

AD6640

AD6640

ANTENNA 5

ANTENNA 6

AD6620s (32 CHANNELS)

AD6640

ANTENNA 8

AD6620s (32 CHANNELS)

AD6640

SUM

ADSP-21xx

(32)

SUM

ADSP-21xx

(31)

SUM

ADSP-21xx

(30)

SUM

ADSP-21xx

(3)

SUM

ADSP-21xx

(2)

SUM

ADSP-21xx

(1)

32 CHANNELS OUT

EACH CHANNEL IS SUMMATION

FROM EIGHT ANTENNAS

COMBINE SIGNALS

FROM EIGHT ANTENNAS

AD6620 (2)

AD6620 (3)

AD6620 (30)

AD6620 (31)

AD6620 (32)

AD6620 (1)

SYNC 1

AD6620 (2)

AD6620 (3)

AD6620 (30)

AD6620 (31)

AD6620 (32)

AD6620 (1)

SYNC 1

AD6620 (2)

AD6620 (3)

AD6620 (30)

AD6620 (31)

AD6620 (32)

AD6640

ANTENNA 7

AD6620 (1)

SYNC 1

AD6620 (2)

AD6620 (3)

AD6620 (30)

AD6620 (31)

AD6620 (32)

Figure 34. Receive Chain for a Phased-Array Cellular Base Station with Eight Antennas and 32 Channels