This is a small Digital Broadband MiniLoop Antenna that is deployable in two physical arrangements to affect efficiency, which provides 0-2500km coverage on 10MHz through 54MHz, which has:
- Receive with low noise characteristics from 1.8MHz through 1GHz and higher frequencies.
- Transmit support without a tuner for Digital Modes from 10MHz through 54MHz.
SPECIFICATIONS
OPERATIONAL SPECIFICATIONS
Specifications of this broadband digital mode Mini-Loop:
- Receive: Low noise characteristics for digital mode from 1.8MHz through 1GHz.
- Transmit: Support without a tuner for digital mode from 10MHz through 54MHz.
- 5W minimum digital input signal required with a maximum input power rating of 25W for Digital Modes. Including but not limited to the MIL-STD-188 M110a digital communications mode that is rated at 25 watts continuous with bursts of 100 watts digital for up to 1 minute using the MIL-STD Data Modem Terminal (MS-DMT) and Automated Message Terminal (AMT) software applications.
USAGE SPECIFICATIONS
- Deployable with quantum and/or fixed/spread-spectrum digital mode equipment.
- Missions that require digital Ground-wave and/or Skywave HF communications.
- Useful when an isolated solution is required.
DEPLOYMENT SPECIFICATIONS
The Mini-Loop is deployable in two ways using the included hardware, where Deployment Option B provides the most efficiency.
ANALYSIS
The following results were nearly identical, whether taken indoors, outside, or in a backpack.
Analysis from 0-1GHz
Analysis from 0-54MHz
WSPR TX Test baselines at 250mw
For TX we purposely tested the loop while deployed between two metal buildings & at 250mw.
NOTE – TX efficiencies increase as power increases, which can lower the usable frequency.
WSPR 30M TX Test
Coverage = 236km to 1506km
WSPR 20M TX Test
Coverage = 675km to 2427km
WSPR 40M RX Test
For all RX tests we purposely tested the loop while deployed indoors and between floors of a multi-story building.
Max Range = 1337km
WSPR 30M RX Test
Max Range = 1797km
WSPR 20M RX Test
Max Range = 1838km
USAGE SCENARIOS
Where secrecy is paramount, communication through unseen methods plays a crucial role. Some of the usage scenarios of clandestine antennas include:
- SCADA
- Context: Protecting infrastructure is key to providing continuity, integrity, and availability.
- Scenario:
- Solution:
- Clandestine Deployment: A small out-of-site antenna is significant to hiding communications capabilities are less likely to be thwarted.
- Clandestine Communications in Cyber-Denied Environments:
- Context: In an era where internet-based communications are vulnerable to surveillance and attacks, intelligence operatives seek alternative methods.
- Scenario: Imagine a situation where an operative needs to communicate without exposing themselves to internet-based surveillance.
- Solution:
- Physical Separation: Platforms physically separated from the internet can be used. These platforms are not susceptible to internet-based surveillance or attacks.
- Radio Technology: Combine modern computer-based software with radio technology.
- Importance: Counterintelligence and law enforcement must adapt to these evolving communication methods.
- Countermeasures: Detect radio-based clandestine communications and secure evidence.
- Operational Scenarios where concealment and minimizing visibility are critical:
- Inside a Parked Car:
- Example: Monitoring a nearby building while parked outside.
- Setup: Transmitter, receiver, and antennas positioned out of sight from windows.
- Between Floors in an Office Building:
- Example: Operating from the third floor to the first floor.
- Setup: Transmitter, receiver, and antennas positioned out of sight carried out of site under clothing.
- Out in the Open:
- Example: Providing regional communications support while deployed in the field.
- Setup: Transmitter, receiver, and antennas positioned out of sight inside a backpack.
- Example: Providing regional communications support while deployed in the field.
- Example: Operating from the third floor to the first floor.
- Example: Monitoring a nearby building while parked outside.
Remember, clandestine antennas are designed to operate covertly, avoiding detection by adversaries. Their success lies in striking a balance between effective communication and maintaining secrecy with a right sized antenna.
All these solutions are enabled by the Broadband Alpha Mini-Loop.
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Broadband tuning across all the digital frequencies necessary for NVIS and Groundwave communcations are delivered in this small loop antenna.