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You are here: Home / Calculators / VSWR Calculator

VSWR Calculator

VSWR Calculator

The VSWR Calculator uses the Root-Sum-of-Squares (RSS) Analysis to calculate the most probable VSWR values in a single waveguide assembly with multiple bends, twists, or a chain of Waveguide Assemblies when added together.   To use the calculator, enter the VSWR value for each of the assembly components being added.

Enter VSWR of up to 8 components. If you have less than 8 components, leave the unused inputs as 1.0.

If you need further assistance please scroll down for more detailed instructions for how to use the VSWR Calculator.

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How To Use The VSWR Calculator

Example 1

Waveguide Fixed Attenuator Assembly

This diagram illustrates how multiple elements contribute to the total VSWR of a typical W/G subassembly.  In the above case, elements of interest such as a triple crossguide coupler at figure A, a fixed attenuator at fig. B, and a crossguide coupler with multiple bends at fig. C are shown with their corresponding contributing VSWR values.  By entering the values given above into the VSWR calculator, we see that the probable assembly-chain VSWR of: 1.05 + 1.15 + 1.09  = 1.19

Example 2

To use the calculator, enter the VSWR value for each of the assembly components being added, as exampled below. 

(3) ea 90°E-Bend - 1.05 VSWR max
(1) ea Flex Assy - 1.12 VSWR max

For this assembly you would enter:
Input VSWR #1 = 1.05
Input VSWR #2 = 1.05
Input VSWR #3 = 1.05
Input VSWR #4 = 1.12
Input VSWR #5 = 1.0
Input VSWR #6 = 1.0
Input VSWR #7 = 1.0
Input VSWR #8 = 1.0

The probable VSWR of the chain is 1.15 max

Example 3

284_flexassy

This diagram illustrates how multiple elements contribute to the total VSWR of a typical waveguide subassembly.  In the above case, elements of interest such as: Cast Miters at figures A, C, D, and E, and a Flex WG section at Fig. B, are shown with their corresponding contributing VSWR values.  By entering the values given above into the VSWR calculator, we see that the probable assembly-chain VSWR of: 1.05 + 1.08 + 1.05 + 1.05 + 1.05 = 1.13

Example 4

To use the calculator, enter the VSWR value for each of the assembly components being added, as exampled below. 

(3) ea Miter Bend - 1.03 VSWR max

For this assembly you would enter:
Input VSWR #1 = 1.03
Input VSWR #2 = 1.03
Input VSWR #3 = 1.03
Input VSWR #4 = 1.0
Input VSWR #5 = 1.0
Input VSWR #6 = 1.0
Input VSWR #7 = 1.0
Input VSWR #8 = 1.0

The probable VSWR of the chain is 1.05 max

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