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XEC24P3-30G Datasheet(PDF) 12 Page - Anaren Microwave |
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XEC24P3-30G Datasheet(HTML) 12 Page - Anaren Microwave |
12 / 19 page USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 411-6596 +44 2392-232392 Available on Tape and Reel for Pick and Place Manufacturing. Model XEC24P3-30G Rev B Pin 1 Pin 4 Input Port Coupled Port Isolated Port Direct Port PIn POut(RL) POut(DC) POut(CPL) POut(ISO) Figure 1 The coupler is excited at the input port with Pin (watts) of power. Assuming the coupler is not ideal, and that there are no radiation losses, power will exit the coupler at all four ports. Symbolically written, Pout(RL) is the power that is returned to the source because of impedance mismatch, Pout(ISO) is the power at the isolated port, Pout(CPL) is the power at the coupled port, and Pout(DC) is the power at the direct port. At Anaren, insertion loss is defined as the log of the input power divided by the sum of the power at the coupled and direct ports: Note: in this document, insertion loss is taken to be a positive number. In many places, insertion loss is written as a negative number. Obviously, a mere sign change equates the two quantities. ) dB ( P P P log 10 IL ) DC ( out ) CPL ( out in 10 (2) In terms of S-parameters, IL can be computed as follows: ) ( log 10 2 41 2 21 10 dB S S IL (3) We notice that this insertion loss value includes the power lost because of return loss as well as power lost to the isolated port. For thermal calculations, we are only interested in the power lost “inside” the coupler. Since Pout(RL) is lost in the source termination and Pout(ISO) is lost in an external termination, they are not be included in the insertion loss for thermal calculations. Therefore, we define a new insertion loss value solely to be used for thermal calculations: |
Similar Part No. - XEC24P3-30G |
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