NTi MegaLoop FX

NTi MegaLoop FX HF Active Loop Antenna

The MegaLoop FX makes the most diverse radiating elements possible. As standard, a loop made of flexible PVC-coated and seawater-resistant (V4A) stainless steel wire is available.
Additionally, an aluminum rigid loop with a diameter of 40 cm or 80 cm is also available. Due to its versatility and adjustment of amplification, there will always be an ideal combination of the loop size and amplification.

Key Facts

  • Ultra-wideband design from 9 kHz - 180 MHz
  • High dynamic range with an IP of typ. +40 dB and IP 2 of typ. +85 dB
  • Compact and lightweight design
  • Perfect for mobile use
  • Low Noise as H-Field is used
  • Rigid loop or stainless steel cable

Excellent IP values with power supply as low as 5V

With two signals in the 7 MHz range, an excellent IP3 value of typ. +40 dB and a IP 2 value of +85 dBm is achieved with mere 5 V ( max. 40mA) and so the loop can be powered via USB or power bank. A power inserter (bias tee) supply is included in the standard scope of delivery.

Integrated threefold surge protection of the active parts

Coarse protection by gas arrester with 60V trigger voltage and a max. pulse leakage current of 1 kA (8/20µs) and by twofold additional integrated fine protection of max. 2 kV and 8 kV respectively. Additionally, the loop connections are connected to ground with high impedance to avoid static charges.

FX = Flexible

The Megaloop FX is our latest active loop amplifier for the 9kHz to max. 180MHz range. It combines all the outstanding features of the successful MegaLoop ML 200 and ML 052. Due to its integrated selectable FM band stop filter and the three-step amplification a maximum of flexibility for all kinds of use is possible.

Flexible range of application

This broadband magnetic loop antenna is especially suitable for places with difficult reception due to electrical interference (E-field) in the near-field area, it is also made for indoor use or on the balcony/patio. You can put it up in the attic, at the window, on the balcony, in the carport fixed to the wall or permanently attached to a mast.

Flexible FM-band stop filter and three-step amplification

Based on the well proven MegaLoop platform, an additional low pass filter and a FM-band stop filter were integrated which can be activated or deactivated with a jumper. In case of FM-interference, the FM band stop filter can be activated with a jumper and so FM signals between 88 MHz and 108 MHz will be attenuated by 25 – 40 dB.

The gain of the MegaLoop FX can be adjusted in three steps by an internal jumper (High/Medium/Low)

Flexible power supply

The antenna can be operated by two different kinds of power sources. It can be powered either by a conventional plug power supply (5,5 / 2,1mm round plug) or via USB with a optional cable. Powering via USB has the advantage that no external power supply is needed and that the antenna can be operated  autonomously and noise-free with a separate USB Powerbank. The supply voltage range is 5 - 15V DC and thus the antenna is also well suited for portable use.

Technical Data

Feature Value
Frequency range 9kHz - 180 MHz
Size 80 cm loop or 5 m stainless steel cable
IP3 > +40 dBm typical
IP2 > +85 dBm typical
Impedance 50 Ohm
Gain, FM Band Stop Off High: 25 dB (9 kHz- 110 MHz)
Medium: 20 dB (9 kHz- 150 MHz)
Low: 15 dB (9 kHz- 180 MHz)
Gain, FM Band Stop On High: 25 dB (9 kHz- 52 MHz)
Medium: 20 dB (9 kHz- 60 MHz)
Low: 15 dB (9 kHz- 66 MHz)
Housing 98 mm x 90 mm x 38 mm, IP65
Weight 0.12 kg
Power Supply 5 - 15 DC (typ. 20mA, 40mA max) 2.1 mm pin
Connector BNC
Operating temperature range -20 to +60 grd C
Scope of delivery - MegaLoop FX
- 5m (16,40ft) PVC-coated, seawater-resistant stainless steel wire
- Power inserter
- Manua
Options - Power supply with noise filter
- Rigid loop 80 cm
- Antenna mast mounting bracket
- Weather protection case
- Common mode noise filter
- Galvanic antenna isolator

NTi MegaLoop FX

A small H-Field antenna for the HF range.
Small loops offer several key advantages, such as low absorption of interference from electric fields (making them ideal for use in locations with strong interference) and their compact size allows for flexible placement.