Here are some common WiFi chip manufacturers:
1. Broadcom: One of the world's leading suppliers of semiconductor and RF solutions.
2. MediaTek: Headquartered in Taiwan, Mediatek is a semiconductor company with global influence, mainly producing processors, simulators and wireless communication products.
3. Qualcomm: An American manufacturer of radio communications and semiconductor electronics.
4. Realtek: A semiconductor company headquartered in Taiwan, Realtek is a leading manufacturer of microcontrollers, multimedia processors and networking chips in the field of networking and communications.
5. Intel: One of the world's leading semiconductor chip manufacturers, its WiFi chip is one of the mainstream products in the market.
6. Gainspan: A chip and system solution provider specializing in low-power WiFi wireless connectivity and smart home systems.
In addition, there are many other large semiconductor companies and small companies are producing WiFi chips, such as Cisco, Atheros, Marvell semiconductor (Marvell), radio frequency microelectronics (RFMD) and others.