RF power amplifiers are chosen by the signal level needed at the DUT, not just by headline output power. Frequency range, CW or pulsed operation, gain, input drive, load mismatch protection, harmonics, cooling, and remote control all affect the final bench design.
Current XGY Fit
| Need | Recommended fit | Why it fits |
|---|---|---|
| High-power broadband drive from 0.7 to 2.7 GHz | XPA-0727-200 RF Power Amplifier | Solid-state amplifier delivering 200 W CW output with at least 53 dB gain and N-type RF connectors. |
| Frequency outside 0.7 to 2.7 GHz | Project quote | Share band, power, duty cycle, and load condition so XGY Tek can recommend the correct amplifier class. |
Selection Factors
| Factor | What to check |
|---|---|
| Frequency range | The amplifier must cover the full signal band, including margins and modulation bandwidth. |
| Output power at the DUT | Include cable loss, coupler loss, chamber path loss, antenna gain, and required field strength. |
| Gain and input drive | Confirm the signal generator can drive the amplifier without overdrive or compression. |
| Protection and duty cycle | Check VSWR protection, over-temperature handling, cooling, and continuous-duty requirements. |
How to Decide
| Decision | Accept when | Reject when |
|---|---|---|
| 200 W broadband amplifier | The 0.7 GHz to 2.7 GHz band, DUT power target, 53 dB gain class, and cooling path match the bench. | The actual requirement is outside band, pulsed-only, or depends on an unmeasured fixture loss. |
| Chamber or antenna stimulus | Forward power, reflected power, coupler path, field target, and RF safety boundary are documented. | The power budget ends at the amplifier output instead of the DUT or antenna plane. |
| Automated production rack | Remote enable, status polling, interlock behavior, warm-up time, and failure logging are specified. | The rack depends on manual front-panel operation during a repeatable test sequence. |
Calculate power at the DUT
Start from the required DUT input power or field strength and work backward through cables, couplers, switches, antennas, and fixtures. The amplifier should provide margin without forcing the source or amplifier into unwanted compression.
Protect the amplifier and the DUT
High-power RF benches should include directional couplers, power monitoring, attenuators where needed, interlocks, and a clear load-mismatch plan. The XPA-0727-200 includes over-VSWR, over-temperature, and over-excitation safeguards, but system protection still matters.
Plan control and cooling
Production and EMC benches often need remote control, status logging, rack airflow, and controlled warm-up. Confirm GPIB or LAN integration, rack space, exhaust path, and operator safety before finalizing the amplifier.
Engineering Acceptance Checkpoint
Accept an RF amplifier only after the power budget is traced from source output to DUT input. For XPA-0727-200 class work, record the 0.7 GHz to 2.7 GHz band, 200 W CW output requirement, at least 53 dB gain, connector plan, cooling path, and load-mismatch protection. The evidence package should include 1 forward-power check, 1 reflected-power or VSWR protection check, 1 temperature or airflow note, and 1 spectrum or harmonic review at the intended drive level. Reject the selection if cable, coupler, fixture, or antenna losses are still estimates.
The acceptance review should also define operating mode. A chamber stimulus bench may need continuous CW operation, directional-coupler feedback, and an RF safety boundary; a pulsed radar bench may need duty-cycle evidence, rise/fall behavior, and pulse flatness; a production rack may need remote enable, status logging, warm-up control, and an interlock input. If any of those behaviors are required, they belong in the quote and factory acceptance checklist, not in an email after delivery.
Keep the power budget with the final quote.
For an RF amplifier quote, share frequency band, required CW or pulsed power, input source level, duty cycle, load type, connector preference, and remote-control requirements. XGY Tek can size the amplifier and monitoring accessories together.
Related Guides
- How to Choose an RF Signal Generator — for driving amplifier input.
- How to Choose a Spectrum Analyzer — for verifying amplifier output.
FAQ
Engineering FAQ
Should RF amplifier power be specified at the amplifier output or at the DUT?
Specify the required power at the DUT, then work backward through cable loss, couplers, switches, antennas, fixtures, and safety margin. Amplifier output power alone can be misleading when the bench has several lossy elements.
What is the minimum acceptance evidence for a high-power RF amplifier?
Keep forward-power evidence, reflected-power or VSWR protection evidence, temperature or airflow notes, harmonic or spectrum review, connector plan, and the source drive level used during the test.
When should the quote include interlocks or remote enable?
Include interlocks, remote enable, status logging, and warm-up control when the amplifier will be used in an EMC chamber, production rack, automated test cell, or any bench where operator access is restricted during RF output.