This is a small Broadband Alpha MiniLoop, which has:
- Receive that has low noise characteristics from 1.8MHz through 1GHz and higher frequencies.
- Transmit support without a tuner for Digital Modes from 10MHz through 54MHz and All Modes from 54MHz to 1GHz.
SPECIFICATIONS
- Deployable with quantum and/or spread-spectrum equipment.
- For equipment that simultaneously uses many frequencies.
- Missions that require digital communications using Ground-wave and/or Skywave signal patterns.
- Useful when an isolated solution is required that requires no counterpoise.
Power Rating: 250W at 25% duty cycle, 125W at 50% duty cycle, and 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.
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 Loop 30M TX](https://www.alphaantenna.com/wp-content/uploads/2024/04/WSPR-Loop-30M-TX-min-300x134.jpg)
WSPR 20M TX Test
Coverage = 675km to 2427km
![WSPR Loop 20M TX](https://www.alphaantenna.com/wp-content/uploads/2024/04/WSPR-Loop-20M-TX-min-300x136.jpg)
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 Loop 40M RX](https://www.alphaantenna.com/wp-content/uploads/2024/04/WSPR-Loop-40M-RX-min-300x227.jpg)
WSPR 30M RX Test
Max Range = 1797km
![WSPR Loop 30M RX](https://www.alphaantenna.com/wp-content/uploads/2024/04/WSPR-Loop-30M-RX-min-300x227.jpg)
WSPR 20M RX Test
Max Range = 1838km
![WSPR Loop 20M RX](https://www.alphaantenna.com/wp-content/uploads/2024/04/WSPR-Loop-20M-RX-min-300x227.jpg)
USAGE SCENARIOS
Although deployable in the following Usage Scenarios, here we display one option in this depiction.
Where secrecy is paramount, communication through unseen methods plays a crucial role. Some of the usage scenarios of clandestine antennas include:
- 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 Loop.
Reviews
Broadband tuning across all the digital frequencies necessary for NVIS and Groundwave communcations are delivered in this small loop antenna.