Our History

Delta-Sigma, Inc. Company Origins

Our president had a well traveled history studying first in the Free Territory of Trieste, moving to Eddystone Radio in the UK as a Test Engineer, and working his way up to Chief Engineer for the High Power (MRI) Amplifier Division in Birmingham while continuing to study.  The competition at the time was tube technology.  He established his credentials by being the first to obtain 2kW from a single solid state device (MRF154G).  This attracted the attention of Motorola’s Helge Granberg who encouraged him to move again, this time to the USA.  After careers at RF PowerLabs, Kalmus, Lucas-Zeta and AMT (SPECTRIAN), he was determined not to accept any more compromises and established his own company in sunny California.  The company began in 1995 in his garage in Corona in very cramped conditions before quickly moving into larger quarters in Riverside.  He acquired his first contracts building a 10kW radar transmitter and quickly built up a volume manufacturing business supplying to Universities, research organizations and large companies.  Since then, DELTA-SIGMA Inc. (DSI) has rapidly grown its horizons to become a major international supplier of niche high power RF amplifiers in the frequency band 0.01-2.0GHz.

The product focus is on small size, extreme linearity, high power amplifiers operating in CW and pulse formats, with high power output to 16kW and beyond.  Users are largely Airborne or Space or at Remote sites.  Both commercial and MIL SPEC products have been delivered with the emphasis on meeting the requirements of “special projects” for certain customers.  DSI first offered comprehensive product support, as a way of developing a large customer base.  Looking back, it is clear that his success has been due to his very low warranty return rate that has resulted from an attention to quality.  There have been very few returns in or out of warranty that enhanced DSI’s value to customers in the field, as well as further building its reputation as a reliable product manufacturer.  DSI maintains its state-of-the-art technology by means of its relationships with academic and other institutions, along with its association with a variety of domestic and international programs, and an established customer base (Lockheed Martin, Raytheon, HARRIS GCS, EDO, Rockwell, US DoD, NASA/JPL, Stanford Research Institute among others), especially within the AUSTCANUKUS countries and Israel.

DSI continues to develop new products with a variety of innovative patented features.  This includes couplers that serve a dual use for Vector Feedback systems, extreme isolation switches that radically reduce the complexity of system architectures, ultra linear wideband systems, and efficient control for pulse systems.  We meet or surpass the requirements while maintaining low intermodulation products.  We are also able to respond quickly to customers.  New designs rely on the availability of large numbers of modules and configurations that are made to adapt to multiple program requirements upon customer request.    This modular approach provides for variants that are basically COTS with only minor

tailoring for the final product.  Adaptation is then very low risk, and has the added advantage of driving down cost to the customer with volume production.  It has therefore become economically efficient.

Many of our customers already use this modular architecture.  One has used similar equipment on a program named RIGEL on the Peace-Link program with the Taiwan Defense.  That system was delivered back in 1996 and has been operational 24hr per day since then with no field returns.  As a matter of fact, personnel from the prime contractor jokingly commented to us that they couldn’t make money on predicted sales of spares, since “the equipment you make is so damned reliable, the customer does not think he needs to buy any spares.”

DSI purchased a new facility in 2006, close to the previous building in Riverside CA.  This new building has 12,500 sq. ft with an additional 20,000 sq. ft. of secured parking facility.  It has a bay dock for shipping and receiving heavy loads, and is located approx. ¼ mile from the Riverside Municipal Airport (KRAL).  We continue to seek niche “compact RF” programs for mobile applications which stand to benefit from this approach.