| Attenuators / Loads |
The Aspen Electronics range of fixed / variable attenuators and loads is truly comprehensive. Covering the frequency range from DC to 60GHz and power ratings from 2W to 2kW, in coax and waveguide we are confident we have what you need no matter what the applications.
For any further information or to request a quotation, please do not hesitate to Contact Us.
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ATM
A range of coaxial loads & attenuators including fixed, variable and step attenuators for production or test applications up to 18GHz. ATM's range of waveguide terminations are available in 5 different power ratings with models up to WR22 (50GHz), aswell as double ridge designs. |
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Bird Electronics
Aspen Electronics Ltd, as Bird's only approved European stockist has available for same day delivery a wide range of Attenuators with power ratings from 2W to 2kW, plus Loads/Terminations from 2W to 10kW. |
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Res-Net
Specialising in chip and flange mount resistive products, ResNet can supply both custom and industry standard products for all applications. In addition their range of coaxial attenuators & terminations provide a cost effective solution to any production requirement. |
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Lorch Microwave
Produces a range of custom designed digital attenuators for military and commercial applications up to 3GHz. |
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HXI
The HVA series broadband PIN diode attenuators cover the waveguide bands from 18 ~ 110 GHz. The attenuators are available for applications requiring variations in power levels using a control voltage. |
Standard Coaxial (2W - 250W)
Bird Electronics RF attenuators are renowned for their high-quality, robust construction and conservative power ratings. The use of non-magnetic materials and plating provide naturally lower intermodulation performance and safety when used in high magnetic fields such as MRI equipment.
We have a range of Bird equipment for sale on our online shop, this includes the attenuators and loads listed below, for price and delivery costs please click here.
Features: 
- Bi-directional, 1 thru 6, 10, 20 & 30 dB Standard Values.
- Temperature range typically -40°C to +45°C
- Convection-cooled for quiet, maintenance-free operation
- Robust, Rugged, Reliable and Easy To Use
Please click on the links in the table to see the Price and Availability of Attenuators. If you see a x, please Contact Us for a part number and pricing.
If you can't see your required combination of Power, Attenuation or Connectors, please contact us.
Medium / High Power (300W - 4kW)
Bird Electronics has a wide range of both “dry” and oil-cooled attenuators,
 The Tenuline® RF Coaxial Attenuator range, are a valuable and reliable accessory for reducing power levels and VSWR, for isolating components under test, for harmonic signal analysis, and as comparison standards. Bird's RF attenuators are world renowned for their high-quality, robust construction and conservative power ratings.
Features:
- 4 KW continuous with blower on, 1000 W with blower off
- DC to 500 MHz at Input 1.1 max.
- LC (F) input, N-Type (F) output
- 30 dB Attenuation
Units come in the following power values.
Microwave / Millimeterwave to 60GHz
 Anritsu attenuators offer superior performance in a low cost package. The low VSWR (excellent return loss) minimizes signal reflections and simultaneously reduces ripple effects in the output frequency response. This assures flat, consistent attenuation characteristics regardless of other devices reflection characteristics.
In addition to being available as individual units of 3, 6, 10, or 20 dB, the 41K and 41V Series Fixed Attenuators are also available in sets with certified calibration data. Available frequency ranges cover DC to 26.5 GHz, 40 GHz, or 65 GHz.
Continuously Variable
Aspen Electronics can offer Continuously Variable and Step Attenuators for frequency ranges from DC-40GHz in Coax, Waveguide and PCB configurations, available in Narrow Band and Broadband designs.
Different options include, Digital Counting and/or Direct Reading Dials plus Remote Controllable Motor Drive versions.
- Low Frequency Models (DC ~ 1.0 GHz)
- Miniature Models
- Medium to High Power Models
- Voltage Controlled Attenuators
Step Attenuators
ATM Step attenuators are typically used in test systems where it is necessary to “dial up” the required attenuation value. Available in 1dB steps and 10dB steps (plus dual 1db & 10dB versions) these are ideal for integration into production test rigs or for use during installation and service scenarios.
Standard Models - Single Dial
| Frequency (MHz)
| Model
| Model Overview |
| DC~2500 |
AS013-10-1 |
Attn Range: 0~10dB in 1dB Steps, IL:0.5dBMax ,VSWR: 1.5:1Max. |
| DC~2200 |
AS013-60-10 |
Attn Range: 0~60dB in 10dB Steps, IL:0.5dBMax ,VSWR: 1.4:1Max. |
| DC~2500 |
AS013-70-10 |
Attn Range: 0~70dB in 10dB Steps, IL:0.6dBMax ,VSWR: 1.5:1Max. |
Standard Models - Dual Concentric
| Frequency (MHz)
| Model
| Model Overview |
| DC~2500 |
AS113-50-1 |
Attn Range: 0~50dB in 1dB Steps, IL:1.0dBMax ,VSWR: 1.5:1Max. |
| DC~2200 |
AS113-110-1 |
Attn Range: 0~110dB in 1dB Steps, IL:0.5dBMax ,VSWR: 1.5:1Max. |
Please note the above specifications are an overview only, for full specifications please visit http://www.atmmicrowave.com/coax-Atten-step.html#Step Attenuators.
Chip and Flange Attenuators
Aspen Can supply high/low chip designs as well as chip on flange designs, Aluminium Nitride Solutions are also available.
| Part No. |
Frequency |
Power (W) |
Specifications |
| SMA & N |
| RA2-XX, RA5-XX |
DC-18.0GHz |
2 & 5 |
Datasheet |
| RA10-X, RA20-X |
DC-6.0GHz |
10 & 20 |
Datasheet |
| Flange Attenuators |
| RPA-20, RPA-25, RPA-35 |
DC-2.5GH |
20, 25, 35 |
Datasheet |
| RPA-50, RPA-125, RPA-200 |
DC-3.0GHz |
50, 125, 180 |
Datasheet |
| RPAX-25, RPA-50, RPA-250 |
DC-2.4GHz |
50, 100, 250 |
Datasheet |
| Chip Attenuators |
| STANDARD, STYLE C, W, W3, |
DC-8.0GHz |
1; 200 peak |
Datasheet |
| RPCAXX-X |
DC-4.0GHz |
30 & 50 |
Datasheet |
| Chip Resistors |
| RPCXX-XXX |
DC-18.0GHz |
5, 10, 15 |
Datasheet |
| RPCXXX-XXX |
DC-18.0GHz |
67 - 700 cw |
Datasheet |
Specials
Aspen Can also supply:
- 1kW bi-directional 6dB attenuator for “wafer-fab” RF generator power control
- 5W, 130dB attenuator for radio system dynamic range testing
- 1200W, 40dB high accuracy attenuator for 470-860MHz Digital TV application
- 100W, weatherproofed attenuator with 7/16DIN connectors for outdoor RF systems
Lastly, something special. Do you operate a radio system and would like to attenuate the output of your radio but maintain the receiver sensitivity?
If so you might be interested in the Aspen “one way attenuator”. This was supplied to a customer who needed to reduce the output power of their telemetry radios whilst maintaining the full dynamic range of the receiver.
Because it was not possible to simply “turn down” the transmitter, as the radio was a sealed type approved system, the only option was to fit an attenuator to the duplexer output.
The Aspen “one way attenuator” provided 20dB in the transmit path, but only 0.4dB in the receive path. The result, one happy customer and the confirmation that “lateral thinking” does come in useful sometimes.
For any further information or to request a quotation, please do not hesitate to Contact Us.
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