This ring coupler is also called a hybrid ring, which is a kind of power divider. It can also be regarded as a directional coupler with 3DB coupling. Generally, when measuring the main signal, take the 3DB signal as a test Use, because there is a certain degree of isolation between the two channels, so the measurement will not have much impact on the main signal product Parameters: 1. Frequency range 2.3GHZ-2.5GHZ 2. S21 is -3.8dB 3. S11 is less than -15dB 4. S22 is less than -15dB 5. Test results Performance parameters: Product size: 50x50MM without SMA SMA outer screw inner hole Product weight: 12 grams Material:PCB colour:brown Package Contents: 1 x Ring Coupler Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.