A Good range Of VWSR?

[pirok]

What is a good range for VWSR in HFSS design?

 

[jeeudr]

When designing antennas, the common specification for matching is quoted as a 10 dB return loss.

Converting to VSWR, this would mean a VSWR < 1.924 : 1

 

[pirok]

Thank you , if the VWSR is 1.041 is acceptable?
It should be near to the number you mentioned?
Thank you in advanced

 

[jeeudr]

A VSWR of 1.041 is quite good and definitely acceptable for most applications.

The physical limit of VSWR is 1. As you approach VSWR < 1.1, you can use return loss as a finer indicator of performance.

 

[pirok]

And how we can approach that? i mean which parameters affect VWSR?
THANK YOU

 

[jeeudr]

Microwaves101 has a good introduction to VSWR. **broken link removed**

VSWR is related to the impedance mismatch between your input feed and the device under test. You can achieve near perfect VSWR by achieving a good match between the input and load.

A VSWR of 1.041 would mostly be considered good enough. From an engineering point of view, efforts spent on further reduction might not be that effective (law of diminishing returns).

 

[pirok]

Thank you so much