Function difference: The main function of 4G antenna is to receive and send 4G network signal to achieve fast Internet access on 4g lte router sim card. But Wi-Fi antenna is primarily used to receive and send Wi-Fi network signal to enable high-speed Internet access on fixed devices.

Working frequency band: WiFi antenna mainly work in 2.4GHz and 5GHz frequency bands, while 4G antenna work in higher frequency bands such as 2.5-2.6GHz frequency band, this difference in frequency bands leads to differences in their signal propagation characteristics and coverage.

Transmit power: 4G antenna transmit power is usually much higher than WiFi antenna, for example the transmit power of one channel of LTE FDD RRU is about 20W-40W (about 43-46dBm), generally dual-channel (single carrier, adapted to 2×2 MIMO). In contrast, the maximum transmit power of 4g lte router sim card is only 20dBm (about 0.1W), which greatly limits the coverage and penetration capabilities of WiFi.

Antenna gain: 4G antenna usually use high-performance filter and radio frequency module to ensure signal stability and reliability; While WiFi antenna use high-sensitivity and wide-band antenna to achieve high-speed data transmission and stable network connection. 4G antennas generally have higher gain than WiFi antenna, which help improve signal propagation distance and reception quality.

Usage method: 4G antenna usually require an external antenna interface, while Wi-Fi antenna normally built in 4g lte router sim card and do not require additional interface.

Application scenarios: Due to differences in transmit power and antenna gain, 4G antenna has been designed to achieve wide-area and pan-public coverage from beginning, so there will be obvious differences in terms of protocols and practical engineering applications. 4G antennas are more suitable for scenarios require wide coverage and long-distance transmission. The original design intention of WIFI (802.11a/b/g/n/ac) is small-scale, popular coverage so WiFi antennas are more suitable for wireless LAN connections in small areas such as homes and offices.