Where to put the extra module antennas on a 12S

So, I got myself a 12S to have a play with this project. First job is I want to add a couple of the extra modules, the A7105, and the CC2500. Question is where are you guys putting the antennas ? The 12S antenna has an SMA connector so you can't just stick the next antenna up the pipe with the old one.

Putting holes in the rear of the case would make life easy but I'd rather not butcher the case. If I have no alternative then this will only happen if I get a spare first.

Any ideas very welcome !

Cam.

We had this discussion in some other threads. Maybe you can find them, but don't ask for the right keywords...

In general there are some limitations: length of the antenna / length of the shielded part of the antenna, covering esp. with electrical or metal parts and direction to the model.
You can try to place the new antenna at the upper front side of the Devo12 (in front of the switches), so the antennas will be oriented good to the model (the worst thing you can do is to point with the antenna to your model since the power in this direction is very low - mounted from left to right or vice versa gives you black holes sidewise to your tx / you and you will probably not fly there too often).

But we have some rf specialists here who can tell you more.

Ah, should have explained myself better. Ultimately I would like to use the CC2500 module to control aircraft via the FrSky protocol, and I would like full range (i.e. 1mile). Would hiding the antenna in the case be wise with this in mind ? My gut says no.

I know the options are limited, so limited in fact I'm not really sure why I asked. Guess I was hoping for something obvious I had missed.

Cam.

Hi Cam

The problem is not so much having (a proper dipole) antenna inside the devo12 enclosure - the bigger factors influencing range would be where and how it is mounted in the case, e.g. it should not be shield by your hands, and secondly the orientation in relation to the model. Due to the dimensions and space available, an internal antenna would normally points to the model, which is the worst possible option.

These two factors basically mandate that the antenna should be outside in "free air" and positioned 90 degrees to the direction of the model if you want maximum range. However, for short-range park flyers and indoor models a well positioned internal antennae is normally sufficient.

As RBE suggested there are a few antenna threads on this forum which should give you a few ideas and guidelines in this regard.

Thanks for the confirmation. I understand the radiation pattern, and that objects in and around the Tx may cause problems. Butchering my Tx and excellent RF seem bound together still

Can you tell me as I have searched without success, in these threads are people using a 12S and exterior antennas ?