Demonstrated capability in 2010 on a NASA program (TxACE) to a DSCS Sat

  • Autonomous self-calibration of atmospheric effects
  • Autonomous continual self-calibration of all electronics and fiber 
  • Instantly available when switched on - no calibration needed after initial installation
  • ​NASA HQ Medals awarded for Exceptional Engineering Achievement​

Applicability

  • Reflector antenna arrays for Deep Space  missions where return signal latency prevents use of Closed-Loop Methods
  • Open-Loop transmit and receive arrays for Mars mission

Benefits

  • High bandwidth uplink for Deep Space Communication
  • High frequency (e.g. Ka-band) uplink due to atmospheric mitigation​   Read more...

Code of Conduct

Our company code of conduct can be downloaded here:  code of conduct

sai very widely spaced array using a cooperative target

Image Credit: NASA, Guardian Express (Pijttersen), News.com

Image Credit: NASA KSC

What are the choices?   Optical space-based optical systems are useful for decades-in-advance asteroid mapping.   Although they can't image these objects beyond producing a 'bright spot', with multiple observations they can deduce orbit, rotation rates,  and material composition.    Ground-based optical systems such as Pan-STARRS are limited by the inability to view the Sun-lit sky.  They would have missed the Russian asteroid.  Traditional single dish ground-based RADAR systems can perform object imaging and characterization based on tip-offs from optical space-based systems.  However, they are limited by power, antenna availability, and sky coverage.  Expensive space-based RADAR vehicles such as spacecraft DAWN have to travel  to each 'rock'.  We propose an always ready, multi-antenna, ground-based RADAR array for high resolution asteroid imaging and characterization.    Read more...

Specialized Arrays Inc. 700 Wavecrest Ave Unit 103, Indialantic, FL 32903

Designed for Your platform, your mission

The most challenging environment for coherent transmit arraying is on multiple moving platforms such as UAVs or satellites.  This is due to the relative motion between the antennas and the need for precision spatial knowledge and wireless time/phase transfer.      Retrodirective methods have major limitations.  We offer novel solutions to these challenges.

U.S. Utility Patent Application Serial No. 15/013,283 SYSTEM AND METHOD FOR WIDELY-SPACED COHERENT TRANSMIT ARRAYING USING A REMOTE RECEIVER

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sai Equatorial radar array for orbital debris

Terms and Conditions

Detailed terms and conditions for this website can be downloaded here:  terms and conditions 

Image Credit: Permission of AIAA 

website terms of use


Our patented low-cost system offers a 24/7 ground radar system for Space Situational Awareness (SSA) able to:

  • Detect and characterize centimeter size objects at altitudes dependent on the number of antennas
  • All propagating Earth-orbiting objects including will periodically pass through the array beam due to the system's location and orientation - LEO, MEO, GEO
  • Detects low orbit, low inclination objects missed by terrestrial Space Fence
  • Measure orbiter parameters precisely in only one-pass due to mitigation of the too short arc (TSA) problem   ​Read more...
SAI Quick Deployable widely-spaced transmit arrays

U.S. Utility Patent Application Serial No. 15/013,283 SYSTEM AND METHOD FOR WIDELY-SPACED COHERENT TRANSMIT ARRAYING USING A REMOTE RECEIVER

U.S. Utility Patent 9,989,634 SYSTEM AND METHOD FOR DETECTION AND ORBIT DETERMINATION OF EARTH ORBITING OBJECTS

Applications
•  Quick deployable systems for soldiers on-the-move
• Communications to a GEO satellite from widely-spaced antennas
•  Arraying shipboard reflector antennas on a flexing structure
​Benefits

  • On-the-move high bandwidth uplink capability
  • Low profile, distributed radiation sources; mitigates discovery,
    • AOA/geolocation/ARM targeting
  • Built-in redundancy and fault tolerance
  • Quick setup, teardown
  • EIRP is proportional to the number of elements squared

​​​What are traditional transmit phased arrays?  The elements are closely and regularly spaced - about 1/2 wavelength apart (1.5cm at 8 GHz or 0.5 cm at 32GHz).   Phase errors due to the element separations are relatively easy to accommodate.  The Marconi wireless station in Cape Cod  demonstrated transatlantic transmit arraying from 4 elements about 1/2 wavelength apart on January 18, 1903.  A telegram was sent from Roosevelt to King Edward VII.

What are specialized transmit phased arrays?  The elements may be thousands of wavelengths apart, arbitrarily located and oriented.  Intractable element-to-element phase errors previously made this approach impossible.  We demonstrated widely-spaced Tx/Rx arraying using 3-12m antennas spaced over 2000 wavelengths apart.

Open-Loop vs Closed-Loop coherent transmit arraying:   Our Open-Loop methods are applicable to missions, particularly Deep Space, where a cooperative response is NOT available and where the return signal latency is too great to be of use in forming the transmit beam.  Our Closed-Loop methods utilize a cooperative responder (assuming acceptable latency) for quick set-up.   Both systems are instantly available for COMM and/or radar missions after the initial installation.

ORBITAL DEBRIS DETECTION & CHARACTERIZATION, AN OVERVIEW

Antenna elements located on available space on platforms such as rockets, space vehicles, and ships, can be configured to operate as a coherent transmit/receive array. Demonstrated benefits include:

1. Nearly spherical coverage with much greater than omni gain

2. Reduced power and mass for a given data rate

3. Superior coverage between subarrays -where traditional 'switched' arrays often fail  Read more...

Decades of experience in advanced adaptive signal and image processing techniques including precision angle of arrival (AOA), blind signal sorting, and sensor fusion


Our high-fidelity modeling and simulation reduces risk and time when implementing prototype systems.

A closed-loop method which uses feedback from the remote receiving target to achieve an optimum response, and which is feasible for targets that are not too distant from the transmitting array, so that feedback latency is low enough that circuit and propagation variation can be corrected quickly enough to keep losses acceptable

Applicability

  • Missions where the dishes are not mutually visible or easily surveyed
  • Transmit arraying to a  GEO or SatCom
  • High-bandwidth receive arrays for Near-Earth Network missions
  • Orbital debris detection
  • Moving platforms (UAVs)  with 3D near-field pattern control

Benefits

  • Less complexity compared to model-based Open-Loop methods   Read more...

sai very widely spaced open-loop coherent transmit array 

Until recently open-loop coherent transmission from very widely-spaced antennas was thought to be unrealizable due to circuit, transmission line, and atmospheric variations.  According to NASA, "the principals are the originators of and the only team in the world that has demonstrated operationally feasible, real-time radio frequency adaptive optics techniques."  ​Read more...