Taking a look at every kind of EMI antenna

A conical spiral antenna from ETS-lindgren, model 3101.

The DPA3000 dipole antenna from Teseq is used to evaluate fields inside a chamber.

The 6502 loop antenna from ETS-Lindgren can measure signals down to 9kHz. You can use it for testing to commercial emissions standards testing, such as CISPR 16-1-4. You can also use it for magnetic testing, particularly for MIL-STD-461B.

The SAS-551 monopole antenna from A.H. Systems lets you measure electric fields for performing perform shielding effectiveness and immunity testing.