The Keysight 87104B is a high-performance, multiport electromechanical coaxial switch designed for RF and microwave signal routing applications. It is a single-pole four-throw (SP4T) terminated switch operating from DC to 20 GHz, delivering exceptionally low insertion loss, high isolation, and outstanding repeatability over a long operating life of more than 5 million cycles.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Solder terminals (Option 100) or 16-pin ribbon cable connector (Option 161) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 24 VDC nominal (Option 024, range 20-30 VDC), 15 VDC nominal (Option 015, range 12-20 VDC), or 5 VDC nominal (Option 011, range 4.5-7 VDC) |
| Operating Temperature | -25 to +75 °C |
| Dimensions (W×H×D) | 63.5 mm x 56.1 mm x 63.5 mm |
| Weight | 0.227 kg |
| Mounting Hole Thread | 4-40 UNC or M3 × 0.5 |
Mechanical & Design Characteristics
| Parameter | Value |
|---|---|
| Switch Configuration | SP4T (Single Pole 4 Throw), Terminated |
| RF Connector Type | SMA (female) |
| Switching Sequence | Break-before-make |
| Life Cycle Rating | 5,000,000 cycles (guaranteed minimum) |
| Life Cycle Rating (Typical) | 10,000,000 cycles |
RF Performance Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 20 GHz |
| Characteristic Impedance | 50 Ω |
| Insertion Loss (DC to 4 GHz) | < 0.3 dB |
| Insertion Loss (4 to 12.4 GHz) | < 0.4 dB |
| Insertion Loss (12.4 to 20 GHz) | < 0.5 dB |
| Isolation (DC to 12.4 GHz) | > 100 dB |
| Isolation (12.4 to 20 GHz) | > 90 dB |
| SWR (DC to 4 GHz) | < 1.15 |
| SWR (4 to 12.4 GHz) | < 1.25 |
| SWR (12.4 to 20 GHz) | < 1.40 |
| Insertion Loss Repeatability | 0.03 dB (maximum up to 5,000,000 cycles) |
| Maximum CW Input Power (Thru-path) | 2 W CW (cold switching) |
| Maximum Peak Input Power | 100 W (pulse width ≤ 10 µs, 1% duty cycle) |
Actuator & Control Specifications
| Parameter | Value |
|---|---|
| Actuator Type | Latching |
| Switching Speed / Switching Time | < 15 ms |
| Actuation Current (at 24 VDC Nominal) | 120 mA |
| Actuation Current (at 15 VDC Nominal) | 188 mA |
| Actuation Current (at 5 VDC Nominal) | 350 mA |
| Current Interrupt Feature Support | Yes, built-in current interrupt paths to prevent continuous coil dissipation |
Environmental & Reliability
| Parameter | Value |
|---|---|
| Storage Temperature Range | -55 to +85 °C |
| Relative Humidity Range | 95% RH at 40 °C for 5 days |
| Operating Altitude | 4,600 m (15,000 ft) |
| Storage Altitude | 15,300 m (50,000 ft) |
| Vibration (Operating) | 10 g peak, 55 to 2000 Hz |
| Mechanical Shock (Operating) | 500 g @ 0.5 ms (half-sine) |
| Mechanical Shock (Non-operating) | 500 g @ 0.5 ms (half-sine) |
Ordering & Accessory Options
| Parameter | Value |
|---|---|
| Drive Control Option 300 | TTL / 5V CMOS drive compatibility |
| Position Indicators Option 400 | Electronic position indicators |
Control Options
| Parameter | Value |
|---|---|
| Option 100 Actuator Voltage | Option 024 |
| Option 150 Actuator Voltage | 15 VDC (12 to 20 VDC) |
| Option 160 Actuator Voltage | 5 VDC (4.5 to 7 VDC) |
| Drive Control Option 500 | TTL/CMOS compatible drive |
| DC Connector Option 201 | Solder terminals (replaces ribbon cable) |
Drive Control
| Parameter | Value |
|---|---|
| Standard DC Connector | ribbon cable with 16-pin DIP plug |
| TTL Low State Voltage | 0 to 0.8 V (Option 500) |
| TTL High State Voltage | 3.0 to 5.0 V (Option 500) |
Environmental Compliance
| Parameter | Value |
|---|---|
| Moisture Resistance Standard | MIL-STD-202, Method 106 |
| Altitude Standard | MIL-STD-202, Method 105C |
| Vibration Standard | MIL-STD-202, Method 204D, Condition B |
| Shock Standard | MIL-STD-202, Method 213B, Condition G |
RF Characteristics
| Parameter | Value |
|---|---|
| Termination Type | 50 Ω internal termination |
Power Handling
| Parameter | Value |
|---|---|
| Internal Termination CW Power | 1 W |
| Internal Termination Peak Power | 50 W (10 µs max pulse width, 0.01% duty cycle) |
| Maximum CW Input Power at 2 GHz | 100 W |
| Maximum CW Input Power at 4 GHz | 70 W |
| Maximum CW Input Power at 12.4 GHz | 50 W |
| Maximum CW Input Power at 20 GHz | 40 W |
Position Indicators
| Parameter | Value |
|---|---|
| Position Indicator Maximum Contact Current | 100 mA |
| Position Indicator Maximum Contact Voltage | 30 V |
Control
| Parameter | Value |
|---|---|
| TTL Control Input Current (High State) | 1.4 mA (at 5.0 V) |
| TTL Control Input Current (Low State) | 0.1 mA (at 0 V) |
Technology
Electromechanical Coaxial Switch
Applications
RF and Microwave Signal Routing