An RF Dummy Load is a device used to simulate an electrical load during testing. It can test your RF equipment without interfering with the radio waves.

Whether you are experienced in the field of RF or not, you'll need an RF dummy load for testing the RF equipment for ensuring the radio station operating normally. But do you know how to recognize the best RF dummy load when facing the various choices in the market?

To help you buy an ideal and low-cost RF dummy load, we show up 6 key points to consider. Let's get started!

1# Power Rating

When you are testing the RF equipment, you'll get the RF dummy load running continuously. To operate safely, therefore, you should focus on whether the power rating is satisfied with your needs rather than the peak power.

Usually, it is recommended that the low power RF dummy load (under 200w) is for amateur radio stations and low power radio stations while the high power RF dummy load is for professional radio stations.

2# Frequency Range

You should note whether the frequency range covers your needs. Usually, an RF dummy load has a wide frequency band like DC (that is 0) to 2GHz, so you don't have to worry about it too much. 

3# Impedance Values

Just like the antenna systems, the RF dummy load should have a good match with the RF sources as well. Therefore, the dummy load impedance value should be the same as the antenna or transmission line.

The RF dummy load 50 Ohm and 75 Ohm are the standard types we use. And the RF dummy load 50 Ohm usually matches with the RF sources best in RF situations.

4# Heat Dissipation System

The purpose of the RF dummy load is to replace the antenna and receive the RF energy. The absorbed energy will be turned into heat in the dummy load, therefore, you should pay attention to the heat dissipation system.

Usually, the dummy load relies on the heatsinks, and they are made from alloy, aluminium, etc., and this kind of dummy load is called dry heatsink load. Besides the dissipation system above, there are some RF dummy loads dissipating heat by fluid, including water, oil and air, etc. 

According to our engineer Jimmy, water cooling is the best way to dissipate heat but it requires complicated maintenance.

5# Connector Types

Connecting the RF sources with the RF dummy load is the last step in preparation. All you need to do is that ensuring the connector is matched. 

The RF dummy load has a wide varieties of connectors types, including N type, BNC type, etc. And they have different sizes as well.

Conclusion

Speaking of which, you have been equipped with the knowledge to pick up the best RF dummy load. An ideal RF dummy load is generally the basic in building up the radio station. 

If you need more help in building up your radio station, why not find a reliable brand for help? For example, FMUSER can not only provide you with the RF dummy loads with a large range of power ratings from 1W to 20KW, equipped with different kinds of connectors types and heat dissipation methods that fulfil your different needs.

If you want more about RF dummy load, please feel free to contact us!