The Schwarzbeck VULB 9168 TRILOG hybrid log-periodic broadband antenna adopts integrated biconical + log-periodic structure, covering 25 MHz to 2 GHz with single unit to eliminate antenna replacement during testing and greatly boost chamber measurement efficiency. Constructed of lightweight aluminum alloy (3.1 kg only), it features low VSWR for perfect matching with EMI receivers and RF amplifiers. Bidirectional design supports both radiated emission receive test and radiated immunity transmit test, fully compliant with CISPR, ANSI and automotive CISPR 25 EMC standards, serving as the standard calibrated antenna for anechoic chamber radiated measurement.