AF002C4-39 Просмотр технического описания (PDF) - Alpha Industries
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AF002C4-39 Datasheet PDF : 4 Pages
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GaAs IC Control FET Series DC–2.5 GHz
AF002C1-39, AF002C4-39
T/R and Antenna Changeover Switch for Mobile Cellular Systems
Mobile
Antenna
Phone
Antenna
Diplexer
LNA
PA
T/R Switch
Disconnect
Changeover
Switch
From Transmitter
To Receiver
T/R Switch
System Block Diagram
T/R Switch Schematic
LT (nH)
Antenna
Changeover Switch Schematic
Antenna
D
S
TX
λ/4
RX
CT
DS
GaAs FET
AF002C
Series
G
VCTL
10 kΩ
G
C (pF)
D
GaAs FET
AF002C
S Series
G
To T/R Switch
VCTL
Truth Table for T/R Switch
VCTL (V)
0
TX to Antenna
Low Loss
-5
High Isolation
See next page for positive voltage operation.
RX to Antenna
High Isolation
Low Loss
Component Values for T/R Switch Circuit
Part Number
AF002C1-39
AF002C4-39
AF002C1-39
AF002C4-39
LT (nH)
165
85
44
22
CT (pF)
18.8
18.8
4.7
4.7
Freq. (GHz)
0.45
0.45
0.90
0.90
Truth Table for Changeover Switch
VCTL (V)
-5
0
See next page for positive voltage operation.
Antenna
Connected
Isolated
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
3
Specifications subject to change without notice. 3/99A
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