A good antenna is a guarantee of success. You can have excellent coverage, the perfect IoT module, but if you don't have a good antenna, your project is at risk. And thus, do not risk and choose from the most widely used 2J connector antennas.
If you are using 4G networks in your application for fast data transfer, it is crucial to have a reliable and high performance antenna. The new 2J4A24Pa adhesive mount antenna is the most competitive solution on the market.
Things are getting smaller (except for cars) and this is true also for antennas. 2JE18 is a small surface mounted antenna with dimensions of only 40x7x3mm. It is designed for a surface mounting directly on PCB- and thanks to its excellent parameters, it is intended to be used in IoT devices.