Active Monopole Antenna : 3301C | ETS-Lindgren

The ETS‑Lindgren Model 3301C Active Monopole Antenna is a broadband receive-only antenna designed to measure electric fields across a wide frequency range without band switching or tuning. It includes a high input-impedance amplifier and a counterpoise for accurate EMC measurements.

Benefits :

• Very broad frequency coverage from 30 Hz to 50 MHz
• Flat antenna factor (±1 dB) between 250 Hz and 20 MHz
• Selectable low cutoff frequencies to prevent saturation
• Portable design with internal battery and BNC output

Key Features :

• Frequency range: 30 Hz – 50 MHz
• Low‑frequency roll‑off: switchable at 170 Hz, 1.9 kHz, or 22 kHz
• Antenna factor: flat within ±1 dB (250 Hz–20 MHz)
• Dynamic range: up to 141 dB; saturation threshold ≈ 0.8 V/m
• Operation time: ~30 h continuous per charge
• Connector: Grounded BNC female output
• Calibration: Individually calibrated; MIL‑STD‑461G and CISPR16‑1‑6 compliant
• Construction: Stainless steel rod with 61 cm counterpoise and internal rechargeable battery base
• Weight: ~1.4 kg

Typical Applications :

• Low‑frequency electric field measurements in EMC labs
• Compliance testing per CISPR 16‑1‑6 and ANSI C63.5
• Portable field surveys and immunity testing

Further Information :

• Battery-powered with saturation indicator and auto‑attenuation
• No need for external preamp or band switching
• Designed for long-term field deployment and repeatable measurements