The **M2PHSW-161-R/CE** is a specialized high-performance coaxial switch, typically categorized as a **failsafe electromechanical switch**. These components are critical in RF (Radio Frequency) and microwave systems for routing signals between antennas, transmitters, and receivers. --- ### 1. Technical Specifications Overview Based on standard naming conventions for this series of RF switches, the primary electronic and mechanical characteristics are as follows: | Feature | Specification | Description | | :--- | :--- | :--- | | **Switch Type** | SPDT (Single Pole Double Throw) | Switches one input between two possible output paths. | | **Actuator Type** | Failsafe | Automatically returns to a "default" position when DC power is removed. | | **Frequency Range** | DC to 18 GHz (Typical) | High-frequency capability suitable for satellite and telecom. | | **Impedance** | 50 Ohms | Standard matching for RF systems to prevent signal reflection. | | **Voltage** | 12V or 28V DC | Standard operating voltage for the internal solenoid. | | **Connectors** | SMA Female | Standard precision interface for coaxial cables. | --- ### 2. Core Electronic Components The device consists of several integrated sub-assemblies that manage the signal flow: #### A. The Solenoid Actuator The "heart" of the switch. When DC voltage is applied to the control pins, an electromagnetic field is generated, pulling a mechanical plunger to move the internal RF contacts. #### B. RF Cavity and Contacts * **Gold-Plated Contacts:** Used to ensure low insertion loss and high conductivity. * **Isolation:** Designed to prevent "leakage" of the signal into the inactive port (typically >60dB isolation). #### C. Control Circuitry Depending on the specific "CE" suffix variation, it may include: * **Suppression Diodes:** To prevent Back-EMF (voltage spikes) from damaging the driving electronics when the switch is toggled. * **Indicator Circuitry:** Mechanical or electronic sensors that provide a "feedback" signal to a computer to confirm the switch has actually moved. --- ### 3. Functional Behavior (Failsafe vs. Latching) As a **Failsafe** model, the electronic behavior is defined by power state: 1. **Power OFF:** The internal spring holds the switch in **Position 1**. 2. **Power ON:** The solenoid overcomes the spring, moving the switch to **Position 2**. 3. **Power Loss:** The switch immediately reverts to **Position 1**. --- ### 4. Typical Applications * **Redundancy Switching:** Switching to a backup transmitter if the primary fails. * **Signal Routing:** Directing a single antenna to either a receiver or a spectrum analyzer. * **Automated Test Equipment (ATE):** Routing signals through different filters or amplifiers during hardware testing.