Thursday, August 22, 2013

RPL0045 Low Band Modules: 20 More Deliveries!

20 more LB Modules, built using our internal amplifier designs, were built and tested and delivered to our customer on time! These modules are being deployed in a subsystem on board U.S. Navy submarines.
Posted by Bob Wood at 12:39 PM
Edited on: Friday, July 25, 2014 3:16 PM
Categories: 60 Hardware Products-Archive

Friday, February 22, 2013

Equalizer Product Line Keeps Growing and Expanding!

We keep improving and adding to our lineup of available equalizer products. We currently have over 155 low loss equalizers designs with more to come. Each design is unique with a range of choices of various slopes, along with a mixture of different frequency bands from 5 kHz to 20 GHz. We can provide a selection of male and female combinations of connectors on the inputs and outputs. We'll keep updating the equalizer main page as we get more designs completed, so feel free to stop by again, or ask us if we don't have what you are looking for.
Posted by Bob Wood at 2:53 PM
Edited on: Friday, August 19, 2016 6:45 PM
Categories: 60 Hardware Products-Archive

Tuesday, September 29, 2009

R. A. Wood Associates awarded contract from NSWC Crane Division

R. A. Wood Associates has been awarded a contract from Naval Surface Warfare Center (NSWC), Crane Division. The contract involves designing and delivering an automated test rack consisting of:

  • A 40U rack with rack mount PC, work table, LCD monitor, GPIB controller cards,
  • A state of the art Vector Network Analyzer (VNA) with 10 port extension
  • A PXI chassis with PXI cards providing thermocouple temperature measurement, serial ports, 2 X 96 digital I/O signals
  • A custom designed RF Load Box for testing up to eight transmitter/receiver modules, capable of providing 50 Watts of RF power
  • Custom designed software for controlling the Load Box and the VNA equipment

We are fortunate to be able to work with Viewpoint Systems on this contract.

This contract was won on a competitive bid, and our solution was selected out of many other submissions. We are very excited about the opportunity to work with NSWC Crane Division!

TSDMS Rack drawing  
Posted by Bob Wood at 10:19 PM
Edited on: Tuesday, October 08, 2013 5:10 PM
Categories: 60 Hardware Products-Archive, 70 LabVIEW Examples-Archive, 80 Consulting Examples-Archive

Thursday, December 18, 2008

LB RF Amplifier Modules delivered

Using our Extreme BW RF amplifiers, we designed, built, and tested 7 LB RF amplifier modules for one of our customers. Our customer's original vendor failed to deliver their amplifier products and meet the requirements. So we stepped in and helped them meet their delivery schedules. These modules were made to "drop in" to our customer's modules.

These modules will be used in our customer's systems, which will be installed on board Navy vessels.

A full set of test data was provided for each LB RF Amplifier Module delivered. Our automated RF test software (RFSpecTest and Painless Extraction) helped to quickly capture the test results and create the test reports.

LB RF Amplifier Rf PLAte
Posted by Bob Wood at 1:08 AM
Edited on: Tuesday, October 08, 2013 4:27 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Monday, November 03, 2008

Equalizer Designs now extended up to 18 GHz

Hello Everybody

We've enhanced our portfolio of equalizer designs with new high frequency equalizers, with low losses all the way up to 18 GHz!

We also now have a smaller package design (M02 package).

We can now offer low loss, high linearity equalizers over the following frequency bands:

  • 5 KHz to 2.0 GHz
  • 0.5 to 8.0 GHz
  • 1.0 to 8.0 GHz
  • 1.0 to 2.0 GHz
  • 2.0 to 4.0 GHz
  • 4.0 to 8.0 GHz
  • 4.5 to 12.5 GHz
  • 4.0 to 18.0 GHz
  • 8.0 to 18.0 GHz
For more detailed information on available designs, including measured S21 ans S11 plots, and package outlines, visit our "Equalizers on Demand" product page.
Posted by Bob Wood at 10:45 PM
Edited on: Tuesday, October 08, 2013 4:26 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Wednesday, October 01, 2008

Electronics Support Switching Unit (ESSU) designed, built, and tested by R. A. Wood Associates

R. A. Wood Associates designed, built, tested, and delivered 2 Electronics Support Switching Units (ESSU) to one of our customers. This was another set of hardware slated to to be installed on a Navy Vessel. The ESSU was designed to be installed between the front end (Antennas, RF amplification switching, filtering) and back end (RF processing) of a complex RF/Microwave system. The purpose of the ESSU was to allow a second front end (RF Subsystem 2) to be switched into the same back end, to make use of the RF signal processing in the back end.

Some of the major components in the ESSU are as follows:
  • Wideband RF/Microwave amplifiers
    • Our Extreme BW RF amplifier was used in this design for the low frequency, wide bandwidth RF path
  • Equalizers and attenuators to align the RF paths
    • Some vendor purchased equalizers were used
    • R. A. Wood Associates equalizers were also used where vendor equalizers were not available
  • Terminated mechanical RF switches (50 ohms)
  • Terminated mechanical RF switches (75 ohms)
  • HDRFI external RF interface to save RF connector space
  • DC power conditioning
  • FPGA card to control switches and provide Built-in-test (BIT) status
  • LED displays for BIT and switching status
  • Custom designed audio switching board
ESSU Front View  ESSU Rear View 
For additional information, please visit our ESSU information page.
Posted by Bob Wood at 6:48 PM
Edited on: Tuesday, October 08, 2013 4:26 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Monday, June 30, 2008

Extreme BW RF Amplifiers

We've taken a challenge and come out on top again! We've developed an Extreme BW RF Amplifier, providing ~22 dB gain, and high dynamic range (~36 dBm Third Order Output Intercept Point) over the frequency band of 5 KHz to 2 GHz. An integrated RF package of 1.9" L X 1.3" W X 0.4" H was developed for the Extreme BW RF Amplifier and also included:

  • DC filter to suppress power supply ripple and noise
  • An input Equalizer where you can specify the full band slope desired
  • An output Resistive Power Divider for providing 2 equal RF outputs

The input Equalizer and output Power Divider can be "zeroed out" if not needed. The input Equalizer can be used to compensate for the amplifier slope and/or passive loss slopes. We can provide a variety of RF slopes in the input Equalizer. More information is available from our Extreme BW RF Amplifier page. Let us know if you are interested in this product line! Bob Wood.

Extreme BW RF Amplifier
Posted by Bob Wood at 10:53 PM
Edited on: Tuesday, October 08, 2013 4:25 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Wednesday, June 25, 2008

JBU RF Plate Assemblies designed and delivered for Naval Application

R. A. Wood Associates designed, built and tested and delivered 2 "JBU RF PLate" Assemblies. These RF assemblies were used to provide wideband gain, equalization, and Built-in-test (BIT) injection between two very long RF cable runs (between an Antenna Assembly and below decks receivers). The gain and equalization was needed to preserve the RF path noise figure and dynamic range performance through the long cable run.

The exciting part for us is that this design will actually be deployed on a US Naval vessel. This is our first of several LRU's that were designed to be used on a US Naval vessel.
 JBU RF Plate 
Posted by Bob Wood at 11:09 PM
Edited on: Tuesday, October 08, 2013 4:25 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Thursday, June 19, 2008

New "Equalizers on Demand" RF products available

Greetings! We've been very busy working on creating a new series of RF/microwave products: "Equalizers on Demand". "Equalizers on Demand" are wideband, low loss frequency equalizers made to provide a positive gain slope from the lower frequency to the upper frequency. These equalizers are designed to flatten out slope caused by long cables or other passive losses, or amplifier negative gain slopes. We have developed a wide series of equalizers with various slopes covering the following frequency bands:

  • 5 KHz to 2.0 GHz
  • 0.5 to 8.0 GHz
  • 1.0 to 8.0 GHz
  • 1.0 to 2.0 GHz
  • 2.0 to 4.0 GHz
  • 4.0 to 8.0 GHz
  • 4.5 to 12.5 GHz

Equalizers are very important to help your system obtain the best dynamic range performance. You can use them to flatten out a negative gain slope to reduce gain tolerances/differences before going into high dynamic range amplifiers.

We're hoping this series of products create a new paradigm in RF performance. We can provide these very quickly to help correct slope in an RF path, "Equalizers on Demand" can trim RF path slopes almost as easily as attenuators can be used to adjust nominal gains.

These products were developed internally to fill a void in the RF industry. It's very difficult to quickly order a fixed slope equalizer to correct an excessive sloped RF path without waiting 10-12 weeks for delivery. Our losses at the high frequency are the lowest available in the industry. We've searched far and wide to find products with the characteristics of our products, but could not find vendors to supply them. So we bit the bullet (many bullets) and worked on these designs ourselves.

We've worked very hard to make these products easily producible. We can deliver these very quickly (typically 2-4 weeks). If you pre-order an equalizer in a certain frequency band, and then let us know what slope you need, we can most likely incorporate the slope and deliver a tested equalizer within 1-2 weeks.

For more information for the current products and designs available, please visit our "Equalizers on Demand" product page.

We hope we can help improve your RF/Microwave system performance with these products! Bob Wood

Posted by Bob Wood at 5:39 AM
Edited on: Tuesday, October 08, 2013 5:11 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Sunday, November 04, 2007

RF Receiver Simulator Delivered!

Hello Everybody

We just delivered our latest product: a multi-channel RF/Microwave Receiver Simulator. This device simulates the RF front end of an ESM (Electronic Support Measures) system. The simulator matched the noise figure, gain and dynamic range of the RF front end. The simulator contained 9 channels of RF bands covering from 10 MHz all the way up to 40 GHz.

Some pictures of the RF Receiver Simulator are shown below. The RF Receiver Simulator is a 3U rack-mounted assembly mounted in a protective roll-away cart for ease of transportability.

Rf Receiver Simulator pictures   Rf Receiver Simulator picture

Posted by Bob Wood at 2:40 AM
Edited on: Tuesday, October 08, 2013 5:01 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Wednesday, September 12, 2007

EW Receiver Simulator designed, built, tested, and delivered

'We just delivered an EW Receiver Simulator to one of our customers. The simulator provided the simulated RF and microwave front end performance of an EW (Early Warning) Receiver subsystem. Our simulator allows the EW Receiver/Processor to be evaluated without requiring the actual front end system. The simulator was designed to match the system front end noise figure, gain, and dynamic range. This also represents a new modular and mechanical design for us.

A block diagram of one channel of the EW Receiver Simulator is shown below:

EW Receiver Simulator Diagram

Some pictures of the EW Receiver Simulator are shown below. The box is built to be used as bench-top equipment or as a 3U rack-mount installation. This is the first design of our standard rack-mount chassis, capable of supporting up to 16 plug-in modules (1 inch standard width). Cooling air is pulled from front to back, and the modules are thermally clamped (with Calmark Clamps) to the top and bottom of the chassis.

EW Receiver Simulator Pciture   EW Receiver simulator Picture

Posted by Bob Wood at 2:25 AM
Edited on: Tuesday, October 08, 2013 5:00 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Friday, September 15, 2006

New Integrated RF Test Rack Designed and Delivered

On September 15 2006, R. A. Wood Associates delivered the first two of 15 complete Integrated RF Test Racks. The Integrated RF Test Rack provided a complete solution for complete automated testing of 7 RF/Digital modules. All equipment was controlled through GPIB interfaces. All automated test software was written in National Instruments LabVIEW by R. A. Wood Associates. RFSpecTest was used in "script" mode to perform most of the RF measurements. The rack consisted of:

  • 2 Signal Generators (one for RF signals, one for LO signals)
  • 1 Spectrum Analyzer (for measuring RF signal amplitudes and frequencies)
  • 1 Multimeter (for monitoring resistances and voltages at various points on the modules)
  • 3 Power Supplies (for providing DC power to the modules under test)
  • A rack mount PC with GPIB and Digital I/O cards, loaded with software for controlling test equipment and reporting test results
  • A rack mount interruptible power supply (UPS)
  • R. A. Wood Associates Automated RF Test Fixture
  • Laser Bar Code Reader (for reading and automatic entry of module serial numbers)
  • A 19" Flat Panel Display (mounted on movable monitor arm)
  • Keyboard and Mouse in a slide-out ergonomic tray

The full rack was designed to be a comfortable testing environment, as well as easy to maintain. Equipment is easy to remove if needed with minimal interference to other equipment.

More information about the Integrated RF Test Rack is available from this link.

Posted by Bob Wood at 1:36 AM
Edited on: Wednesday, October 09, 2013 11:32 AM
Categories: 10 QuickNews, 30 LabVIEW Projects-Current, 60 Hardware Products-Archive, 80 Consulting Examples-Archive

Friday, December 02, 2005

New Computer Automated RF Test Station developed and delivered

We designed and developed a Computer Automated RF Test Station for one of our customers. The Computer Automated RF Test Station is capable of testing 7 different RF and RF/digital modules, but is flexible enough to test many possible RF modules. The Test Stations were built and tested at R. A. Wood Associates. Computer automated test software was also developed to test the 7 different modules using LabVIEW. RFSpecTest was used in a "scripted" mode to perform all RF tests. More information about the Computer Automated RF Test Station is available at this link.
Posted by Bob Wood at 3:09 AM
Edited on: Tuesday, October 08, 2013 4:53 PM
Categories: 60 Hardware Products-Archive, 70 LabVIEW Examples-Archive, 80 Consulting Examples-Archive

Sunday, April 17, 2005

New RF Receiver Simulator Delivered

We delivered a wideband RF/microwave Receiver Simulator to one of our clients on March 1. The simulator was designed to simulate the front end of an RF/Microwave system. Frequency coverage went from HF to SHF Ka Band. The simulator was required to have very low noise figures and very high intercept points/compression points. The unit was delivered in 6 months after order. More information is available at this link location.
Posted by Bob Wood at 11:53 PM
Edited on: Tuesday, October 08, 2013 5:17 PM
Categories: 60 Hardware Products-Archive, 80 Consulting Examples-Archive