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參數(shù)資料
| 型號： | CV210-3 |
| 英文描述： | Dual-Branch Downconverters |
| 中文描述： | 雙分行下變頻器 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 286K |
| 代理商： | CV210-3 |
Specifications and information are subject to change without notice
WJ Communications, Inc
Phone 1-800-WJ1-4401
FAX: 408-577-6621
e-mail: sales@wj.com
Web site: www.wj.com
November 2003
CV210-2
Cellular-band Dual-Branch Downconverter
Product Information
The Communications Edge
TM
Device Architecture / Application Circuit Information
Typical Downconverter Performance Chain Analysis (Each Branch)
Cumulative Performance
Input
P1dB
(dBm)
-9
11
10
8
10
+8
Stage
Gain
(dB)
Input
P1dB
(dBm)
Input
IP3
(dBm)
NF
(dB)
Current
(mA)
Gain
(dB)
Input
IP3
(dBm)
30
27.5
+27.5
NF
(dB)
LO Amp / MMIC Mixer
IF Amplifier
CV210-2
-9
19
11
2
30
22
9.3
1.8
60
150
360*
9.3
11
11
Cumulative Performance
* The 2
nd
branch includes another mixer and IF amplifier, which increases the total current consumption
of the MCM to be 360 mA.
CV210-2
: The application circuit can be broken up into three main
functions as denoted in the colored dotted areas above: RF/IF diplexing
(blue), IF amplifier matching (green), and dc biasing (purple). There are
various placeholders for chip components in the circuit schematic so that
a common PCB can be used for all WJ dual-branch converters. Further
details are given in the Application Note located on the website titled
“CV2xx Series - PWB Design Guidelines”.
External Diplexer:
In a downconversion application, the incoming RF
signal impinges on the switching elements of the mixer; the interaction
with these switches produces a signal at the IF frequency. The two
signals (RF and IF) are directed to the appropriate ports by the external
diplexer. A six-element diplexer is used in the circuit implementation.
IF Amplifier Matching:
The IF amplifier requires 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. Proper
component values for other IF center frequencies can be provided by
emailing to applications.engineering@wj.com.
DC biasing:
DC bias must be provided for the LO and IF amplifiers
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.
Printed Circuit Board Material:
.014” FR-4, 4 layers, .062” total thickness
1
2
3
4
5
6
7
21
20
19
18
17
16
15
28
27
26
25
24
23
22
8
9
I
10
G
11
A
12
13
14
G
IF Amp 2
IF Amp 1
LO Driver Amp
BIAS
GND
N/C
GND
LO
GND
N/C
N/C
GND
BIAS
GND
N/C
GND
N/C
G
M
I
G
A
I
G
G
G
M
G
RF/IF
RF/IF
I
I
O
I
O
LPF
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| CV210-3A | 制造商:WJCI 制造商全稱:WJCI 功能描述:Cellular-band Dual-Branch Downconverter |
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| CV210-3APCB240 | 功能描述:射頻開發(fā)工具 800-960MHz RF Brd 240MHz IF RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| CV211-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual-Branch Downconverters |
| CV211-1A | 制造商:WJCI 制造商全稱:WJCI 功能描述:PCS/DCS-band Dual-Branch Downconverter |
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