There are many types of power combiners, including hybrid combiners, to help you with your tasks. However, you can’t choose just any part that you find. You want to make sure the combiner you pick meets certain standards for your project.
1. High In-Band Isolation
You want to look for a wideband device that can combine many different frequencies with at least 30 dB of port to port isolation. Ensuring this high isolation is the key to choosing a quality part.
2. Very Low PIM
Having very low PIM goes hand in hand with low insertion losses. Therefore, you want to look for combiners that have the lowest PIM available.
3. High Power Handling
If your combiner can handle up to 500 W continuously per port, they will be great for combining signals from base stations to antenna systems. Having a high power handling like this is also good for powering tower mount amplifiers. Additionally, it would be best to look for a part with a peak envelope performance of 3 KW per port. These high power enabled specs will depend on how the part is made, not its overall size.
4. DC/AISG Input Pass-Through
A DC/AISG input pass-through on all of your ports is a huge benefit. This enables your device to power certain things, like tower mount amplifiers. When you are purchasing a combiner, look for multiple DC paths.
5. Outdoor Rated Unit
Units that are rated for outdoor use are the most durable. They can also be mounted outdoors so that you can combine more than one base station signal to your antenna system. They may also cover a wider range of frequencies than some types, with spectrum capabilities of around 700 MHZ to 2700 MHZ. Outdoor units are also available in various sizes, so you will be able to find the right one for you.
Picking the right power combiners can be difficult. However, there are certain things you can look for to make sure that you pick a quality combiner.