Based on this product's specifications, here are some alternatives and similar models
Omni-directional antenna DeLOCK 12697
Summary description:
The DeLOCK 12697 is an omni-directional antenna with a gain of 2 dBi and a 50 Ω impedance. It features a vertical polarization and an N-type connector. Compact and lightweight, with a width of 17.8 mm and a diameter of 2 cm, it is ideal for enhancing wireless signals in various applications. Each pack contains one antenna, packaged in a box for easy storage and transport.