With the development of modern wireless communication system, communication systems such as mobile communication, radar and satellite communication have higher requirements for switching speed,RF Switch power capacity and integration of switching switches, so it is very important to study VXI bus technology and develop VXI bus module to meet the special requirements of the military.
With the development of modern wireless communication system, communication systems such as mobile communication, radar and satellite communication have higher requirements for switching speed, power capacity and integration of switching switches, so it is very important to study VXI bus technology and develop VXI bus module which meets the special requirements of the military. We will use the virtual instrument idea,RF Switch the hardware circuit to the software, the following design RF switch can be directly controlled by the computer, can be easily integrated with VXI bus test system, maximize the use of computer and microelectronics technology in today's testing field, with broad prospects for development.
RF and microwave switches can transmit signals efficiently within the transmission path. The functions of such switches can be characterized by four of basic electrical parameters.
Although several parameters are related to the performance of RF and microwave switches, the following four are considered critical parameters for their strong correlation with each other: isolation, insertion loss, switching time, power processing capability.
The isolation degree is the attenuation between the input and output of the circuit, and it is the index to measure the cut-off efficiency of the switch. Insertion loss (also known as transmission loss) is the total power of the loss when the switch is in the conduction state. Because the insertion loss can directly lead to the increase of the system noise coefficient, the insertion loss is the most critical parameter for the designer.
Switching time refers to the time required for a switch to change from "conduction" status to "cutoff" status and from "cutoff" state to "conduction" state. The time up to the high power switch of the number of microseconds, down to low power high-speed switch to the number of nanoseconds. The most common definition of switching time is the time it takes for the input control voltage to reach its 50% to the final RF output power of 90%. In addition,RF Switch the power processing capability is defined as the maximum RF input power that the switch can withstand without any permanent electrical performance degradation.
RF and microwave switches can be divided into electromechanical relay switches and solid-state switch two major categories. These switches can be designed into a variety of different configurations-from single-pole to single-pole 16-throw, or more-tossed configurations,RF Switch which can convert individual inputs into 16 different output states. Switch switch is a dual-knife double throw configuration switch. This type of switch has four ports and two possible switch states, allowing the load to switch between two sources.