RFID Reader with range bigger than 25cm?

Hi, recently i have read about RS232 Module and antennas UHF (Serial), i need make a RFID reader with Arduino Mega that have a range of 1m, 0,5m... On minimal it.

Currently i'm using RC522 with tags classics, but, this range is aproximately 3cm, or less yet it. Bad.

Is possible use a long range UHF and RS232 (Or others any modules) that use tags rfid. Or other devices to the use read tags long range?

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spycatcher2k:
A reader that can read from over 1 meter is very expensive. Why do you think you need this?

To control input/output on a Farm, and register animals from the same farm in a app android, by example.

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spycatcher2k:
Use crush gates, and Loop antenna based readers.

What is it? You recommend someone specify?