As always, if you ask for advice you should explain what you need/want to do. We do not have a crystal ball to find out what you want. This is for you to decide and tell us before anyone can give you an advise. Similiar if you say I need transportaion is a motorcycle or a car sufficient, dou you need a truckor a bus to allow you to transport what you want
. It is similar for RF devices, there are many different options how to achieve distriution of signals from a single source to multiple outputs. To give you an idea:
-How many ports 2, 4 or more do you want?
-How broadband/which freqncy band do you want to use the Divider/Combiner/Splitter for?
-Which coax connector type (e.g. C, N, SMA, SMB, SMC)?
-WHich impedance 50, 60 75 Ohm?
-DC-pass through or not?
-Are you willing to built it yourself, or want to buy it?
The cheapest Divider/Combiner/Splitter that does not maintain the impedance asr T-coax connectors, they are just the inner conductor to all three ports
Crude resistive devises are made/sold for CATV/SAT-TV use like RCA T56476 4 Way Signal Splitter Coaxial Cable which are broadband.
Than there are other option like a rat race or splitter which have a limited bandwidth
Directional coupler provide a low attenuation through path (>0.5 dB) and have one or more pickups each 10 or more dB attenuated, while the feed through attenuation is >0.5 dB, which are broadband.
If you start searching you can easily find manufacterer names and their distributors e.g. minicircuits.com, mcli.com