The Research Of Embedded Wireless Net System

Embedded wireless net system is discussed from a systematic aspect in the dissertation, and a blue tooth wireless gateway is designed based on ARM CPU. The thesis also presents the design of microstrip patch antenna.First, a multi arc slot microstrip patch antenna loaded with a shorting post is presented. Dual-band operation centered at 2. 441GHz and 5. 2GHz has been obtained. The proposed antenna is of high gain 6. 8dBi (2. 441GNz) and 5.8dBi (5.2GHz), and its impedance bandwidth 121MHz (2.4GHz) and 205MHz (5. 2GHz) defined at VSWR<=2 can meet the requirement of WLAN.Second, an Embedded network system based on S3C4510B ATM7TDMI 32-bit CPU is designed with 2M FLASH, 16M SDRAM, 2 serial port and a 100/10M network communication interface. JTAG soc Debug system and uClinux operating system can be run in this systemFinally, according to the system resources of the ARM platform designed, an uClinux embedded operating system is embedded. The BootLoader code is programmed. This makes preparation for the transplantation and debug of the embedded operating system complying with the wireless communication protocol stackThis dissertation is divided into six sections. The first part is the preface which introduces the significance and the foundation of the thesis; the second part discusses the principle of the system and the bluetooth protocol, and presents the division of the functional module and the design method; the third part discusses the design of dual-frequency microstrip antenna and emulation is done with CST emulation software; the fourth part discusses the embedded system design that is based on S3C4510B ARMTDMI; the fifth part discusses the embedded uClinux operating system and the transplantation of the system; the last part concluded the whole design.