Passive balanced probes are disclosed for use with a signal analysis device. The probes are very low cost relative to typical commercially available probes and provide an extremely flat response over a frequency range of approximately 0 to at least 1.5 gigahertz. The probes include a probe body constructed...http://www.google.se/patents/US7015709?utm_source=gb-gplus-sharePatent US7015709 - Ultra-broadband differential voltage probes
