Based on this product's specifications, here are some alternatives and similar models
Antenna DeLOCK TETRA MHF
Summary description:
The DeLOCK TETRA network antenna operates in the frequency band of 0.430 - 0.470 GHz with a 50 Ω impedance. It features a linear polarization and comes with a 0.15 m cable. The compact design includes a width of 67.5 mm and a depth of 20 mm, making it suitable for various applications. Each pack contains 1 antenna, packaged in a polybag for convenience.