RF High Switching Speed High Isolation Test Systems SP12T PIN Diode Switches

Pin diodes are typically used as switching units for single pole multiple throw switches. The PIN diode acts as a flow control resistor for signals with a frequency greater than 10 times the diode cutoff frequency (fc). By adding a forward bias current, the junction resistance Rj of the PIN diode can change from high resistance to low resistance. In addition, the PIN diode can be used in both series switching mode and parallel switching mode.

The Pin diode acts as a current control electron at radio and microwave frequencies. It can provide excellent linearity and can be used in very high frequency and high-power applications. Its disadvantage is the large amount of DC power required for bias, making it difficult to ensure isolation performance specifications and requiring careful design to achieve balance. To improve the isolation of a single PIN diode, two or more PIN diodes can be used in series mode. This series connection allows sharing the same bias current to save power.

The SP12T PIN Diode switch is a passive device that sends high-frequency RF signals through a set of transmission paths, thereby achieving the transmission and switching of microwave signals. The number of transmission heads in the middle of the single pole twelve throw switch is one, and the number of transmission heads in the outer circle is twelve.

The SP12T PIN Diode switch is widely used in various microwave systems, automatic testing systems, radar and communication fields, and is widely used in electronic reconnaissance, countermeasures, multi beam radar, phased array radar, and other fields. Therefore, studying microwave switches with low insertion loss, high isolation, broadband, miniaturization, and multi-channel has practical engineering significance.