As the demand for Radio Frequency (RF) spectrum grows, many areas of the world are already saturated with RF transmitters that cause widespread interference with one another.  In the future, the assignment of radio frequency spectrum may require a system that prioritizes national, international and global allocation or distribution that limit the available microwave frequencies creating an increasing potential for congestion in the available spectrum. 

Troll Systems’ airborne and ground high-gain tracking antennas and radio frequency ground stations are designed to manage spectrum efficiently.  Already, the technologies we deploy are well suited to a future where spectrum management is likely to be required for military, civil and commercial interests.

1. Narrow Directional Bandwidths

  • Are resistant to interference and jamming
  • Require less power to transmit to the radio horizon.
  • Improve spectrum management in crowded RF environments, leading to better frequency availability.

 2. Radiation Patterns Directional vs. Omni

  • Omni antennas radiate RF energy in every direction, making frequency availability and / or reallocation difficult in concentrated RF environments.
  • Omni antenna radiation patterns are easy to locate, jam and interfere with in operational environments.   
  • To increase range, omni antennas generally require more power leading to more heat, weight and spectrum inefficiency.

“Both Iraq and Afghanistan produced examples of an environment where nearly anything that was turned on interfered with something else.” ¹ Troll Systems microwave antennas utilize tracking systems and directional, narrow beamwidths to achieve the greatest possible efficiency and performance.

Directional Sector Antenna

Reception on up to three frequency bands simultaneously

The A1 is a ground sector antenna designed to provide approximately 60° of coverage. The A1 is lightweight and easy to mount on buildings or the side of a tower. The A1 is designed to be installed around a structure to create an overlapping high-gain reception system. Multiple A1s can be used to form a 360° diversity antenna system capable of up to 15dBi of gain in any one direction when positioned correctly.

The A1 can be purchased in either single or multi-band versions. It incorporates a high-performance down-converter that has exceptional selectivity and noise figure characteristics. This enables the A1 provide a UHF output regardless of the input frequency. Power for the A1 is provided through coaxial cable that connects the antenna to the diversity receiver.

The output of each antenna is fed into Troll Systems’ packet diversity networkingReceiver-StackTwo to eight input diversity receiver with touchscreen interface products that are designed to perform all the packet switching, decoding, transcoding and routing. Troll’s new DMR series receivers provide two to eight antenna inputs that can be deployed individually or daisy chained together to increase the number of unique data streams the A1 can receive.

  • Lower installation costs
  • Reception on up to three frequency bands simultaneously
  • Packet-based IP distribution
  • 1.4GHz to 7.1GHz down-converted to UHF Band
  • Ethernet backhaul capability
Antenna Characteristics Low L Band High L Band S Band Lower C Upper C
Type: Dual Can Dual Slot Dual Slot Quad Slot Quad Slot
Mid-Band: 1.4-1.5 GHz 1.7-1.9 GHz 2-2.5 GHz 4.4-5.0 GHz 6.4-7.1 GHz
Beamwidth: 65°AZ / 35°EL 63°AZ / 33°EL 60°AZ / 30°EL 63°AZ / 14°EL 60°AZ / 12°EL
Antenna Gain: 11 dBi 12 dBi 13 dBi 14 dBi 15 dBi
Polarization: Vertical Vertical Vertical Vertical Vertical

Dual-Polarized Omni Antenna

Supporting Multi-Frequency or MIMO (Multiple Input Multiple Output) Systems

Troll’s dual-polarized antennas, contain both horizontal and vertical polarizations in a single, lightweight aircraft rated package. The antennas are available in S and C bands.

Dual-polarized antennas maximize MIMO (Multiple Input Multiple Output) radio performance. By providing orthogonal RF paths the dual-stream capability of a MIMO radio can be realized. Dual-stream systems provide greater bit rate or increased robustness of the data link.

These antennas support 1x2, 2x2 and 4x4 channel MIMO systems. They work with any 802.11, WiMax, Wi-Fi, applications and are suitable for ground or airborne installations.

Antenna Characteristics
Type Vertical: Vertical Dipole
Type Horizontal: Turnstile Slot
Frequency Band:  S BAND - 2.3 GHz - 2.5GHz
Frequency Band:  C BAND - 4.7 GHz - 5.3GHz
Frequency Band:  C BAND - 5.3 GHz - 5.8GHz
Vertical Beamwidth:  360°
Horizontal Beamwidth:  360°
Antenna Gain Vertical:  3dBi minimum
Antenna Gain Horizontal  3dBi minimum
Elevation Horizontal:  +/- 26°
Elevation Vertical:   +/- 30°
Polarization: Vertical/Horizontal
Cross Polarization:  20dB Typical 

  • Dual-polarity in a single enclosure
  • Airborne rated antenna
  • Various mounting options
  • Optimized within elevation bandwidths
  • Multiple bands available

DualpolarizedOmni 2







Radiation Pattern All Bands
Horizontal
2.4GHz Vertical pattern
Radiation Pattern All Bands
Vertical
2.4GHz horizontal pattern