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VSWR Detector |
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Description |
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COMPACT DESIGN
• DUAL
MONITORING COUPLER
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LOW INSERTION LOSS
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HIGH COUPLER ISOLATION
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VSWR ALARM |
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| 800MHz VSWR Detector
for CDMA 2000, located at output port of LPA(Linear
Power Amplifier) for CDMA 2000, normally operates
"Forward Power", which is outputted
from the amplifier, through 27dB Coupler,
13dB Coupler, 35dB Coupler Isolator, and prevents
LPA from being damaged when upstreamed current
"Reverse Power" reflected from the
"isolator". It functions as a Correction
13dB Coupler, settled at LPA for "Feed-Forward",
and also makes it possible to operate as a
watcher for the System because VSWR alarm
is turn on when "reflection wave"
is generated over the standard level by detecting
"Reverse Power". |
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Specifications |
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| Model No. |
AVDA-880 |
AVDA-881 |
Remark |
| Operating Frequency[MHz] |
869~894 |
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| Onsertion Loss |
0.2dBmax.for Port4->port5
0.6dBmax.for Port8->Port6 |
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| Flatness |
0.2dBmax.@Port8->Port6, POrt1->6, 855~910MHz |
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| Coupling Coefficient |
13dab±0.5dB for coupler9 |
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| 27dab±0.5dB for coupler12 |
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| 35dab±1.0dB for coupler10 |
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| 35dab±1.0dB for coupler11 |
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| Isolation of Coupler |
33dB min. for coupler9(Port8->Port1) |
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| 45dB min. for coupler12(Port5->Port3) |
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| In/Output Isolation |
20dB min. for Port6->Port8 |
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| Return Loss |
15dB min.@Port 2,7 |
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| 25dB min.@Port 1 |
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| 20dB min.@Other Port |
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| VSWR Alarm Output |
6dB±2dB, 35dBm P out 48dBm Alarm:High(+5V),Normal(GND) |
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| >RF Power Capacity |
Forward power 75watts min. |
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| Reverse power 20watts min. |
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| Supplying Voltage |
+12 Vdc 100mA |
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