Model Number QC-052-YR3 is a 3 dB, 90° Quadrature Coupler that when a signal is applied to any port will split equally between the ports on the other side with the adjacent port remaining isolated. The Phase relationship is 0° to the port directly opposite and -90° to the port on the diagonal.

Additional Product Information under, http://www.planarmonolithics.com/products/QC-052-YR3.htm

Product Specifications

General Parameters:
Status: Active
Frequency Min: 0.5 GHz
Frequency Max: 2 GHz
Amplitude Balance: ±2.5 dB Max
Phase Balance: 90° ± 2.5 V
Isolation: 18 dB
RF Input Power Handling: 10 Watts CW
VSWR: 1.5:1 Max
Weight: 1.0 oz Typ
Size: 1.45" x 0.75" x 0.22"
Connectors (In/Out): SMA (F)
Environmental Ratings:
Operating Temperature: -55 ºC to +85 ºC
Non-Operating Temperature: -65 ºC to +125 ºC
Humidity: MIL-STD-202F, Method 103B Cond. B
Shock: MIL-STD-202F, Method 213B Cond. B
Vibration: MIL-STD-202F, Method 204D Cond. B
Altitude: MIL-STD-202F, Method 105C Cond. B
Temperature Cycle: MIL-STD-202F, Method 107D Cond. A