CV211-2A_07 WJCI [WJ Communication. Inc.], CV211-2A_07 Datasheet - Page 3

• Manufacturer Part Number: CV211-2A_07
• Description: UMTS/WiMax-band Dual-Branch Downconverter
• Manufacturer: WJCI [WJ Communication. Inc.]

IF Amplifier Matching:
elements to optimize the performance of the amplifier to the desired
IF center frequency. Since IF bandwidths are typically on the order
of 5 to 10%, a simple two element matching network, in the form of
either a high-pass or low-pass filter structure, is sufficient to match
the MMIC IF amplifier over these narrow bandwidths.
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com
CV211-2A
UMTS/WiMax-band Dual-Branch Downconverter
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
Application Circuit: IF = 75 MHz (CV211-2APCB75)
The IF amplifier requires matching
PCB Layout
RF = 1900 – 2700 MHz, IF = 75 MHz
DC biasing:
in the converter. R1 sets the operating current for the last stage of the
LO amplifier and is chosen to optimize the mixer LO drive level.
Proper RF chokes and bypass capacitors are chosen for proper
amplifier biasing at the intended frequency of operation. The “+5 V”
dc bias should be supplied directly from a voltage regulator.
DC bias must be provided for the LO and IF amplifiers
Ref. Desig.
R1
R2, R3, R4, L3, L7
L10, L11
R6, R7
C1, C5, C10, C15
C4, C11
C6, C12, C14
C7, C13
L1
L4, L8
L5, L9
C2, C3, C8, C9, C16
C17, C19, C20, C21
C22, L2, L6
U1
The Communications Edge
Specifications and information are subject to change without notice
Bill of Materials
Component
11.3 Ω chip resistor
0 Ω chip resistor
3.3 Ω chip resistor
1000 pF chip capacitor
22 pF chip capacitor
.018 µF chip capacitor
100 pF chip capacitor
120 nH chip inductor
150 nH chip inductor
220 nH chip inductor
Shown on silkscreen, but
not used in actual circuit.
CV211-2A WJ Converter
Product Information
Page 3 of 9 June 2007
TM
Size
0805
0603
0603
0603
0603
0603
0603
0603
0603
0805
QFN