A Good range Of VWSR?

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

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

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.

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

Microwaves101 has a good introduction to VSWR. http://www.microwaves101.com/encyclopedia/vswr.cfm

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).

Thank you so much :)