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.

For interconnection of ordinary waveguides there exists a plurality of waveguide flanges. They are defined in detail by the standards IEC 60154-2, EIA RS-166, EIA RS-271, MIL-DTL-3922, MOD UK DEF-5352and others. These standards also specify the designations for the constructive flange design. The designation lists the type, e.g. flat flange without sealing groove, flat flange with sealing groove or choke flange with sealing groove. Furthermore, the types, i.e. the specific flange geometry (as in EIA and IEC standards) or the part number of a specific flange made of a specific material (as in MIL and DEF standards) are indicated. Finally, the designation of the waveguide is given. For the specific details, please refer to the SPINNER technical document TD-00077. In addition to these standardized flange designs, there are other specific designs such as LIL (CERN), DESY or Merdinian. The compatibility is indicated in the data sheets.

EIA flanges are designated CMR (for Connector, Miniature, Rectangular) or CPR (Connector, Pressurizable, Rectangular). Then follows the EIA number (WR number) for the relevant waveguide.

RF characteristics

Number of interfaces:
Interface type:
R 32 per IEC 60153-2
Interface direction:
Waveguide interface:
CPR 284 F (special)
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 type:
Cooling interface:
Main circuit: 2x thread G1
Secondary circuit: 2x Ø12x1
Differential operating pressure, max.:
3·10⁵ Pa (3 bar, waveguide)
Cooling water pressure, max.:
6·10⁵ Pa (6 bar, main circuit)
8·10⁵ Pa (8 bar, secondary circuit)
Coolant input temperature range, max.:
40 °C
Coolant output temperature range, max.:
90 °C
Leakage rate, max.:
5·10⁻⁴ mbar·l/s (at 4 bar absolute operating pressure)
Housing material / coating:
stainless steel
EPDM rubber
aluminum oxide
copper (main cooling circuit), stainless steel (secondary cooling circuit), copper (secondary cooling circuit), aluminum oxide (main cooling circuit), stainless steel (main cooling circuit)
black (RAL 9005)
Degree of protection:
IP 66
Degree of protection 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

Coolant composition:
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