Long-range passive RFID

I'm trying to figure out the best way to implement passive RFID reading over relatively long ranges. (Around a meter)

According to Radio-frequency identification - Wikipedia, the 13.56Mhz readers can get up to a meter, but I haven't found any readers in that range that spec higher than 10cm.

Is this possible using regular RFID solutions. I am hoping to be able to do this in a relatively small form factor, and preferably with passive tags.

Range depends on the aerial. To get 1m you need sonething quite large.

The low frequency ones are better.
They are used for security and animal counting type stuff.
The big hoops you see at supermarket exits will give you some ides of the aerial size required.

Boardburner2:
Range depends on the aerial. To get 1m you need sonething quite large.

The low frequency ones are better.
They are used for security and animal counting type stuff.
The big hoops you see at supermarket exits will give you some ides of the aerial size required.

Im am unsure how they are driven however perhaps a more powerful driver is required.

Thanks. I’m thinking that 1m might be a bit much to expect at this point. Optimally, I’d like something that people can have in their pockets, and have it read by the system as the walk past. For this, perhaps even 30cm might do the trick.