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TDD 200‑300MHz 20W RF Linear Power Amplifier
This is a 200‑300MHz TDD 20W linear power amplifier supporting uplink/downlink dual links and TX_EN/RX_EN intelligent switching. Powered by 32V DC with operating current ≤5A, it delivers downlink max output 43±0.5dBm, gain 48±1.5dB; uplink gain 25±1.0dB, noise figure ≤3dB, in‑band spurious ≤‑36dBm, with excellent EVM and ACLR performance. Integrated with 0‑16dB numerical control attenuation, over‑temperature/over‑power/VSWR protection, it supports RS485 real‑time monitoring and SWIM firmware upgrade. Operating at ‑10℃~+55℃ and sized 165×160×33mm, it is ideal for private network communication, TDD wireless systems and RF relay amplification.
TDD 200-300MHz 20W Linear Power Amplifier Technical Specifications
I. RF Indicator
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Test Item |
Indicators |
Unit |
Remark |
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Downlink |
Uplink |
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Frequency Range |
200-300 |
200-300 |
MHz |
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Maximum Output Power |
43±0.5 |
15 |
dBm |
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Gain |
48±1.5 |
25±1.0 |
dB |
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Noise Figure |
≤15 |
≤3 |
/ |
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Flatness |
≤3 |
≤2 |
dB |
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PA Voltage |
32 |
V |
32V |
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Power Conversion Efficiency |
＞15% |
% |
@43dbm |
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Gain Adjustment Step Size |
1.0 |
Not supported |
dB |
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Numerical Control Regulation Error |
1-16dB |
≤1.0 |
Not supported |
dB |
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Spurious Emission |
In-Band |
≤-36 |
dBm |
Tested with CW signal at the center frequency and output power set to maximum |
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Out-of-Band |
9KHz-1GHz |
No Clutter Above Normal Noise Floor |
dBm |
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1G-12.75GHz |
dBm |
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EVM |
≤10% |
≤1.2% |
Dynamic testing @43dbm |
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ACLR |
≤-35dBc |
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Maximum Allowable Input Power |
≤+10dBm |
≤-10dBm |
dBm |
No damage occurs for continuous operation for 1 min |
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Input VSWR |
≤1.50 |
≤1.50 |
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Output VSWR |
≤1.50 |
≤1.50 |
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≤1.50 |
≤1.50 |
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Switching Delay |
≤2us ≤4.8us |
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High and Low Temperature Test |
Ambient Temperature (℃) |
-10～+55 |
℃ |
Starts normally at low temperatures, monitoring works normally |
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EVM |
≤15% |
≤1.2% |
@43dbm |
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Gain Stability |
±2 @-10℃～+55℃ |
dB |
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Power Stability |
±1.5 @-10℃～+55℃ |
dB |
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Current |
≤5A@32V |
A |
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Power Interface |
KF2EDG5.08-4P |
Male Connector |
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Monitoring Interface |
XH2.54-8P |
Male Connector |
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RF Input/Output Connectors |
RF-IN/LAN OUT/ANT |
SMA-K/MCX-K |
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Uplink/Downlink Switching Methods |
TX_EN and RX_EN signal |
10 indicates transmit state, 01 indicates receive 00: Power amplifier and receive are both off. Simultaneous setting to 11 is prohibited |
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II. Monitoring Function (Implemented via Interface)
Monitoring Function |
Description |
Remark |
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Setting Parameters |
RF Signal Switch |
Turn the power amplifier on or off |
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Downlink Switch |
Turn the power amplifier on or off |
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Downlink Attenuation Value ATT |
Numerical control attenuation, with a gain attenuation range of 0–16 dB and a step of 1 dB; |
Attenuation accuracy:1-20dB≤1.0； |
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PA Over-Temperature Shutdown Threshold |
The over-high temperature shutdown threshold of the power amplifier is configurable; the power amplifier will shut down automatically when its temperature exceeds this threshold. |
Generally setting 90℃ |
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Power Amplifier Over-power Shutdown |
The actual power value is 1dB higher than the downlink ALC start-up threshold, which will shut it down. |
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Amplifier Fault Alarm |
When the enable switch is set to ON, the query module will generate a fault alarm. |
Reserved |
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Query Parameters |
Amplifier Switch Status |
If the amplifier is set to "off", the query should show the amplifier as off; otherwise, it should show the amplifier as on. |
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Downlink Output Power Level Value |
Detecting the output power value of the power amplifier, detection range（Pomax+2，Pomax-20） |
Detection accuracy: Pout±1dB |
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Downlink VSWR Value |
When connected to a mismatched load with a VSWR of 1.5 or 2.0, the queried value is ±0.2. |
The VSWR value is readable in real time |
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Temperature Query |
Detection module internal temperature, detection range: -40℃～+100℃ |
Detection error: ±3℃ |
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ALC Value Query |
The displayed value is equal to the actual set ALC value. |
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ATT Value Query |
The displayed value is equal to the actual ATT value set. |
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Alarm Parameters |
Over-Power Alarm |
An alarm will alarm when the maximum output power exceeds Pomax +1dBm, and will shut down when Pomax +2dBm. |
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Power Amplifier Over-Temperature Alarm |
When the internal temperature of the module exceeds the "amplifier over-temperature shutdown threshold", an over-temperature alarm will be displayed, and the amplifier will be shut down. The module can only resume operation when the temperature returns to below (amplifier over-temperature shutdown threshold -20℃). |
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Amplifier Fault Alarm |
When the power amplifier tube is damaged, a power amplifier fault alarm will be displayed. |
This monitored quantity is reserved in the program, with configurable alarm enable/disable. |
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Module Communication Method |
Using RS-485 serial port |
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Module Upgrade |
SWIM interface upgrade |
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III. Appearance
External Dimensions |
165*160*33mm (Width * Length * Height, excluding interface dimensions) |
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Interface Type |
2w2/2w4 |
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Mounting Hole Diameter |
3.6mm |
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Screw Installation and Fixing |
Screws are of the same specification, installed securely, and none are missing. |