Bi-Directional WLAN Amplifier 2.4GHz

Design by Mohamed K. Nezami for Telekom R&D,

E-mail: [email protected], ......

Bi-Directional WLAN Amplifier 2.4GHz By: Dr. Mohamed K. Nezami

This is an amplifier or “repeater” that is used to extend the range of WLAN 802.11g range to several kilometers using parabolic dish mounted in the outdoors.

U1 LM7806 4

OUT

C1 .1uF

U2 L1 IN

5 C5 10uF

1

3

+ C2 10uF

C3 33pF

1

OUT

1500nH

+

GND 4

RX_6VDC

IN

GND

6VDC 3VDC

2

3VDC

BP

C6 .1uF

/SHDN

3

MAX8877_EZK30-T or Faich,FAN2500530XTR-ND

4 GND 2 2

RFOUT

3

BIAS GND RFIN

RFOUT

LNA

GND VCC

6

C24 33pF

+

3 2

1 7

2 GND

ERA-4SM Gain=14dB 65ma, 4.9VDC @ pin 3 NF=4dB

WLAN RADIO

KLD-SMT2-0202-A JR1

3B WLAN_RADIO J1

4.7K 3 D4 BAS40LT1

1

4.7nH L8

L7 1500nH 100 C21 100pF

Q_SWITCH

GND

TX/RX

OUT1

3

U9 C8 33pF

2

3 2

1 1 C9 33pF C20

+

IL -0.3dB P1dB=+33dBm

10uF

OUT2

CTRL

GND OUT1

RFC

TX/RX

VDD

4

33pF

5 6

C19

UPG2010TB

IL -0.3dB P1dB=+33dBm C17

L4 33pF 1500nH

C10 .1uF

33pF L5 1500nH

4 5 6 7 8

C11

RF OUT RF OUT RF OUT RF OUT

PRE-PA

PC

0

1.5pF C14

10pF RF IN RF IN

1 2 C12

3

GND

3.3pF

Vcc

15nH L3

3VDC

1.5pF C13

3VDC Q_SWITCH

R15 200k

RF2126 U3

3VDC R2 200k

TX/RX=L-----> PA PATH ON TX/RX=H-----> RXPATH ON

3VDC, MAX PWR

R7 2.4k

R3 1000pF C16 100k J10A1 1

2

AGC_IN

TX_6VDC

3

Vcc=5V, Pout=31dBm Pin=19dBm G=12dB VCC=6VDC

DC

Q1 2N2222A_0

TX/RX=H-----> PA PATH ON TX/RX=L-----> RXPATH ON R9 2.4k

1

TX/RX=L-----> PA PATH ON--> TX_6VDC TX/RX=H-----> RXPATH ON---> RX_6VDC TX_6VDC

D2 TX Indicator

TX/RX

2

U10 C15

OUT2

RFC VDD

R8 2.4k

3

CTRL

R10 4K

4

6VDC

6 5 1

Q2 MMDF1N05E / MMDF1N05ER2OSCT-ND 2

RX_6VDC

D3 RX Indicator

7 8

6

C26 10pF

Q1

5 C18

R5

Q_SWITCH

CNTRL=H ----->OUT2 CNTRL=L ----->OUT1

TX_6VDC

Q2

4

33pF

R4 1.7K

RX_6VDC

UPG2010TB

2

-20Log{1+R1/Rin} Rin=Detector input imp. 1.7K gives -30dB fix -20 to 20 dBm

2

R14 200

CNTRL=H ----->OUT2 CNTRL=L ----->OUT1

J2 Antenna 3

3A

AGC_IN

3

C25 .1uF

C22 1000pF

1

3VDC 1000pF

ERA-5SM

1

IL -1.7dB

10uF

100pF

4

MAX2644

Gain=15dB IIP3=-8dBm NF=2dB IP1dB=-13dBm

C7

L2 436-1092-1-ND, 1uH

C27

1VDC

3 OUT

100pF

D1 DC Indicator

R12 33pF L6 3.3nH

Antenna

MIMIC

1 IN

5

R59 10k

C28 .1uF

C63

C23

1 3

GND GND

RFIN

C62

1VDC

1 2

1

RF FIL 4

U7

3

R1 10K

3VDC

R6 3.9k

U6 LFB2H2G45SG7A134 or TKS2610CT-ND

L18 30nH

U21

U22 UA741CD 2

5 4 6

33pF

1

TX/RX

+

R13 10K

C52

-

R60 23

R11 4K

6VDC

WLAN PROJECT , Dr. M.K. Nezami , Dr. Zul, Eng. Kamal, Eng. Faisal Title WLAN PROJECT: Bi-Directional WLAN Amplif ier 2.4GHz Size D Date:

Document Number Tuesday , April 05, 2005

Rev A Sheet

1

of

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