The UMS CHA6094-QKB and CHA6095-QKB are packaged GaN-on-SiC power amplifiers covering 35GHz to 42.5GHz. The CHA6094-QKB provides approximately 2W output with 26dB gain, while the CHA6095-QKB increases the output to approximately 4W with 25dB gain.

Both models target Q-band telecom, 5G active phased-array, satellite communication and radar transmit systems. They are supplied in compact surface-mount QFN packages with internally matched RF ports.

CHA6094-QKB vs CHA6095-QKB Specifications

Which Model Should You Choose?

Choose CHA6094-QKB for Lower Power Consumption

The CHA6094-QKB is better suited to systems where approximately 2W output is sufficient and power consumption or thermal loading must be minimized.

Its lower quiescent current can be advantageous in dense phased arrays containing many amplifier channels. It also provides slightly higher small-signal gain, reducing the drive requirement of the preceding stage.

Choose CHA6095-QKB for Higher Transmit Power

The CHA6095-QKB provides 3dB more saturated output power, equivalent to approximately twice the RF power. It is the better option when the system requires greater per-channel transmit power, additional link margin or fewer amplifier-combining stages.

The higher-power model also supports greater average output with a wideband 256QAM signal, but requires a power supply and thermal solution designed for its higher current demand.

Typical Applications

Both amplifiers are suitable for:

5G millimeter-wave active phased-array antennas

Q-band satellite communication transmitters

Radar transmit and phased-array modules

Point-to-point telecom radio systems

35–42.5GHz RF front ends

Microwave and millimeter-wave test equipment

The CHA6094-QKB is generally suited to lower-power or high-channel-count systems, while the CHA6095-QKB is intended for applications prioritizing higher output from each amplifier channel. UMS identifies 5G phased arrays, Satcom, radar and telecom systems as target applications for both devices.

CHA6094-QKB and CHA6095-QKB RFQ

Pricing and lead time depend on the selected model, order quantity and current factory availability.

For an accurate quotation, provide the required part number, quantity, target delivery date and any lot, date-code or traceability requirements.

Frequently Asked Questions

1. What is the main difference between CHA6094-QKB and CHA6095-QKB?

The main difference is output power. The CHA6095-QKB provides approximately twice the RF output power, while the CHA6094-QKB requires less quiescent current and places a lower load on the power and thermal system.

2. Are CHA6094-QKB and CHA6095-QKB drop-in replacements?

Both use a 24-lead 4 × 4mm QFN package, but they should not automatically be treated as drop-in replacements. Pin assignments, bias connections, RF drive and thermal requirements must be checked against each datasheet.

3. Which model is better for an active phased-array antenna?

The CHA6094-QKB may be preferable for arrays with many channels and a limited thermal budget. The CHA6095-QKB is more suitable when higher output power is required from each antenna element.

4. Can both amplifiers support modulated communication signals?

Yes. UMS provides performance data for both models using 256QAM signals with 120MHz modulation bandwidth, making them relevant to wideband telecom and 5G transmitters.

5. Does the CHA6095-QKB require a different power supply?

Both models use the same nominal drain voltage, but the CHA6095-QKB requires a higher current capability. The power supply and thermal design must therefore be sized for the selected amplifier.