Rigid rectangular waveguide water load CPR 284 F product photo Front View L
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Rigid rectangular waveguide water load CPR 284 F


SPINNER loads offer outstanding electrical and mechanical properties

The modular SPINNER system for loads offers you great flexibility in the selection of your components. It allows you to configure power, frequency range and connectors according to your individual requirements. The advantages are obvious: cost savings through standardization and reliable technical quality.

The Rigid rectangular waveguide water load CPR 284 F is placed to the end of the signal path and thus guarantees the correct impedance termination. This reduces disturbing reflections and ensures the maximum performance and quality of the overall system. You can individually combine your attenuator and adapt it to the requirements of your local installation.

One application area of the SPINNER Rigid rectangular waveguide water load CPR 284 F is in measurement environments. It is characterized by its excellent IM properties and optimized electrical and mechanical tolerances.

Outstanding RF characteristics, best possible passive intermodulation and VSWR

The load enables you to transmit high-frequency signals reliably and flawlessly with optimum protection of your sensitive equipment in a power range up to 700 kW.

The load offers an interface R 32.

SPINNER loads can be mounted vertically or horizontally. Only in a few cases a certain orientation is required for a product and therefore explicitly stated in our product data sheets.

We use liquid cooling for higher power levels. A mixture is used as the coolant which guarantees frost and corrosion protection. From 10 kW we also offer recooling units and safety devices such as Carrier safety loops or temperature monitoring.

The protection class is IP 66.

RF characteristics

Number of interfaces:
Interface type:
R 32 per IEC 60153-2
Interface direction:
Waveguide interface:
CPR 284 F (special)
Waveguide size:
R 32 (WR 284)
Frequency range:
3.7 GHz ± 5 MHz
Average power rating:
700 kW 1)
VSWR, max.:
1.05 @ output temperature main circuit above 40°C
1.15 @ output temperature main circuit 20 to 40°C

Mechanical characteristics

Cooling interface:
Main circuit: 2x thread G1
Secondary circuit: 2x Ø12x1
Differential operating pressure, max.:
Waveguide: 3·10⁵ Pa (3 bar)
Cooling water pressure, max.:
Main circuit: 6·10⁵ Pa (6 bar)
Secondary circuit: 8·10⁵ Pa (8 bar)
Cooling Pressure drop, max.:
Main circuit: 4·10⁵ Pa (4 bar) @ 3.8 l/s flow rate
Secondary circuit: 6·10⁵ Pa (6 bar) @ 10 l/min flow rate
Coolant input temperature, max.:
Coolant output temperature, max.:
Leakage rate, max.:
5·10⁻⁴ mbar·l/s @ 4 bar absolute operating pressure
Case material / surface:
copper-alloy, stainless steel, EPDM rubber, aluminum oxide / painted flat black (RAL 9005)
Material of cooling:
Main circuit: copper, stainless steel, aluminum oxide
Secondary circuit: copper, stainless steel
RF relevant parts surface:
IP protection level:
IP 66
IP protection level remark:
connected with appropriate gasket
Weight, approx.:
8.0 kg
adhesive label

Environmental conditions

Operating temperature:
+18 to +35 °C
Relative humidity, max.:
95% (condensation not allowed)
Storage ambient temperature:
-20 to +50 °C
Storage relative humidity, max.:
95% (condensation not allowed)

Scope of delivery & accessories

Main circuit: demineralised water (resistivity min. 4 kΩ·m)
Secondary circuit: any

Further remarks

- Flow rate cooling main circuit, min. 3.8 l/s,
- Flow rate cooling secondary circuit, min. 10 l/min;
- Coolant input temperature, max. 40°C;
- Absolute operating pressure main circuit, 6·10⁵ Pa (6 bar);
- Pulse width, max. 1000s;
- Duty cycle, max. 1/4.



Product data sheet – 268394 – 268394-DS.pdf