The Compact X-Wing® BiLog® for RF EMC immunity testing The combination of BiLog® technology with novel low frequency, folded elements (X-Wings®) allows low frequency power to be efficiently projected forward without significantly affecting the high frequency performance and, at the same time, reduces the chamber coupling effects. The CBL 6143 has a unique matching network which will allow powers of up to 300 Watts CW to be transmitted, making it suitable for most immunity measurements requiring fields of 10 V/m, or even greater.