The EMCO 3109B is a biconical antenna engineered for radiated emissions measurements in Electromagnetic Compatibility (EMC) testing. Operating from 30 MHz to 300 MHz, this antenna delivers dual-purpose transmit and receive capability across a broad frequency spectrum. Its modified Guanella balun (4-to-1 ratio) provides impedance transformation to 50 Ω, while welded aluminum construction and TFE thermoplastic balun components ensure durability in field and laboratory environments. The antenna handles 1 kW continuous input power and 2 kW peak, making it suitable for demanding test protocols including IEC 1000-4-3 immunity testing.
## Technical Specifications
• **Frequency Range:** 30 MHz to 300 MHz
• **Impedance:** 50 Ω nominal
• **Maximum Continuous Input Power:** 1 kW
• **Peak Power Handling:** 2 kW
• **Balun Configuration:** Modified Guanella, 4-to-1 ratio
• **Connector:** Type N female
• **Biconical Element:** Welded aluminum
• **Balun Materials:** TFE thermoplastics, machined brass, aluminum
• **Weight:** 3.2 kg (7.05 lb)
• **VSWR:** Typically elevated below 70 MHz; optional extended elements available to improve low-frequency performance
## Key Features
• Individual calibration at 1 meter (SAE ARP 958), 3 meters, and 10 meters (ANSI C63.5)
• Signed Certificate of Calibration Conformance included with each unit
• Portable, field-hardened design optimized for storage and transport
• Type N connector for direct integration with test systems
## Typical Applications
• Radiated emissions compliance testing
• IEC 1000-4-3 EMC immunity assessment
• Field strength measurements in the VHF band
## Compatibility & Integration
Calibration conforms to SAE ARP 958 and ANSI C63.5 standards, enabling direct deployment in accredited EMC test facilities.
