Based on this product's specifications, here are some alternatives and similar models
External 4G/5G LTE antenna QOLTEC 9 dBi with SMA connector and 3 m cable
Summary description:
External QOLTEC 4G/5G LTE antenna with 9 dBi gain, SMA connector and a 3 m cable. Designed to improve mobile broadband reception for routers, modems and gateways supporting LTE and 5G NR frequencies. Suitable for mounting outdoors or near windows to increase signal strength, data stability and throughput in areas with weak coverage.