Aeroflex/Metelics has released a family of surface mount PIN diodes ideal for higher power, higher linearity RF and microwave applications for military radio, MRI, and WiMAX markets. The MSW2000 series is manufactured using Aeroflex/Metelics’ proven hybrid manufacturing process incorporating high voltage PIN diodes and passive devices integrated within a ceramic substrate. Measuring 8x5x2.5mm), the PIN diodes offer superior low and high signal performance to comparable MMIC devices in QFN packages. The RF cover provides a suitable degree of EMI shielding, moisture protection, and a flat surface suitable for high volume, surface mount manufacturing and test equipment.
The PIN diodes, available in a SP2T switch configuration, are designed in both asymmetrical and symmetrical topologies. The asymmetrical SP2Ts are available with the Tx RF port on either the left side of the device, or the right side, for design versatility. The symmetrical configuration consists of a series and shunt PIN diode in both RF ports for improved RF isolation in both ports. The asymmetrical SP2T design consists of a unique geometry Tx Series PIN diode that provides a lower Rs, (<0.7Ω at 100mA) for improved power dissipation and higher IIP3 values. The Rx port incorporates a series PIN diode in addition to a shunt PIN diode floated on an RF bypass capacitor, allowing for positive voltage only operation. This arrangement provides improved Tx-Rx isolation in excess of 40dB, or allows less than 10dBm leakage to the receiver port with a 50dBm Tx applied signal.
The switches are capable of operating in either a high signal 100W CW cold switched mode or in a hot switched condition where the RF power state change commutation period from Tx-Ant to Ant-Rx is less than 100ns. With breakdown voltage rating at least 1kV, the switches are capable of operating at higher peak RF power levels than comparable surface mount MMIC switches. Rated RF peak power levels for the SP2T family is 500W peak power at 50μs RF pulse width at 5 percent duty cycle.
Aeroflex/Metelics
www.aeroflex.com/metelics
