Wide Band Systems, Inc.

When you consider advanced DFD/IFM technology,

consider that we….

� Developed the 2:1 ratio correlator array, extending DFD performance to lower RF SNR and improving pulse on pulse, pulse on CW trigger accuracy

�� Developed a Digital Temperature Correction Technique, in place of archaic

oven stabilization

�� Developed the RF to video digitizer, eliminating outmoded DC restoration design

�� Developed (and holds the patent on) the Coherent Threshold, providing the

DFD with a real time, leading edge, pulse on pulse threshold – after limiting – and providing a functional Multipath Blanking technique

�� Developed (and holds the patent on) the Associative Processor, providing

the DFD with a real time, leading edge, pulse on pulse threshold- after limiting- and providing a functional Multipath Blanking technique.

�� Developed the 40MHz clocked sampled DFD, allowing effective pulse on

pulse processing in dense signal environments

�� Provide “turnkey” IFM Receiver Systems, solving all of the technical issues of filtering, thresholding, estimation of RF frequency, RF amplitude, Pulse Width, and Time of Arrival, in a signal unit

ide Band Systems is the only organization

W

dedicated to the design, development, and

production of modern wide band receivers; this is

not one of our product lines, it is our one and only

product and we are dedicated to continuous

improvement of this technology. Wide Band

Systems is the first source of advanced technology

wide band DFDs and IFM Receivers.

on sider this partial list of IFM/DFD products-

Frequency Range (GHz)

Resolution (MHz)

Input Dynamic Range, dB

Amplitude Data

RF Pulse Width (nS)

DC Power (W) (Typ)

Dimensions (inches)

Weight (lbs)

0.05-0.5

0.5

-70 to 0

Yes

100 to CW

31

VME

0.75-1.25 0.534 -60 to +10 Yes 50 to CW 31 19 inch Rack 34 0.75-1.25 0.534 -60 to +10 Yes 50 to CW 31 7 x 10.5 x 3 12.5 0.5-1.1 0.25 -60 to +10 No 100 to CW 16 6 x 7.3 x 1 4 0.5-2 0.5 -60 to +10 Yes 50 to CW 31 VME 12.5 1-7.5 2.0 -60 to 0 No 85 to CW 18.1 6 x 8 x 2.5 9 1.2-1.7 0.5 -20 to +6 No 100 to CW 5.3 5 x 5 x 0.55 1.25 2-4 0.625 0 to +8 No 100 to CW 11.2 7 x 12 x 2 9 2-4 0.3125 -65 to +10 No 40 to CW 16 7 x 12 x 2 9 2-4 0.625 -40 to +10 Yes 100 to CW 31 7.5 x 10.5 x 3 12.5 2-6 1.25 -65 to +10 No 50 to CW 16 7 x 12 x 2 9 2-6 1.25 -60 to +10 No 50 to CW 16 6.2 x 7.3 x 0.8 3.3 2-6 1.25 -60 to +10 No 100 to CW 16 6 x 7.3 x 1 4 2-6 1.074 -65 to +10 No 25 to CW 12.5 6 x 7.3 x 0.8 2.8 2-6 1.25 -65 to +10 Yes 50 to CW 31 7 x 10.5 x 3 12.5 2-8 VME 12.5 3.8-8.2 1.25 0 to +8 No 50 to CW 11.2 7 x 12 x 2 9 5-7 0.3125 -65 to +10 No 40 to CW 16 7 x 12 x 2 9 8-10 0.3125 -65 to +10 No 40 to CW 16 7 x 12 x 2 9 6-18 3.0 -60 to +10 No 50 to CW 16 7 x 12 x 2 9 6-18 3.0 -60 to +10 Yes 50 to CW 31 7 x 10.5 x 3 12.5 6-18 3.0 -60 to +10 Yes 50 to CW 31 19 in 3U Rack 34 7-18.2 3.0 -60 to 0 No 85 to CW 18.1 6 x 8 x 2 9 7.5-18 3.0 -58 to +10 No 100 to CW 13 7 x 12 x 2 9 7.5-18 3.0 -17 to +10 No 100 to CW 13 7 x 12 x 2 9 8-18 11.3 -6 to +4 No 100 to CW 10 5 x 8 x 1.8 4 8-18 VME 12.5 2-18 2.5 -60 to +15 No 40 to CW 13 10 x 6 x 1.5 5

Summary of existing product line parameters

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designed, developed, and manufactured at Wide Band Systems, Inc.

Overview of advanced Digital Frequency Discriminators Digita

Frequency

Discriminators

l

ide Band Systems, Inc. offers a wide variety of Digital Frequency

Discriminator designs, responding to system requirements for bandwidth,

frequency accuracy, and resolution. All of our designs employ 2:1 ratio

correlator arrays, providing the highest phase margin. This allows our

DFDs to operate at a reduced RF SNR and in the presence of multiple

simultaneous signals, in situations where the older 3:1 and 4:1 designs

would produce errors. Our microwave circuits are broadband stripline

designs; our logical processing is in CMOS TTL, using standard ICs.

tem requirements have also demanded a wide variety of triggering

circuits; these have included the internal detector threshold, the external

trigger (with controlled RF to trigger delay), the synchronously clocked

DFD (at clock rates to 40MHz), and the asynchronously clocked DFD.

The diagram above illustrates an asynchronously clocked DFD, which

accomplishes a frequency measurement and RF SNR estimate every 25nS.

The sequence of frequency measurements and RF SNR estimates is

provided to an Associative Processor, which determines whether a new

signal has occurred, then latching the frequency data and setting the Data

Ready Flag. This design, patented by Wide Band Systems, provides a

leading edge noise riding, pulse on pulse, pulse on CW trigger without

requiring log amplitude data.

ysS

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Digital Frequency Discriminator

Designed for an airborne RWR, this clocked DFDset employs a dual seven correlator array toprovide two tracking channels over 2-6GHz.

Measuring just 7.3 x 6 x 1.4 inches, this uniquedesign sets a new standard in size and

p

mp

Designed for a fighter aircraft, this L-band DFD employs an RF limiting amplifier driving a five

correlator array over the 0.5-1.2GHz band, roviding a 10-bit frequency data word. At a size

of 5 x 5 x 0.55 inches, it represents the currentstate of the art in DFD miniaturization.

Designed for a shipboard application, this DFDloys an eight correlator array to “stare” over the

full 2-18GHz band, producing a 14-bit digital frequency data word.

IFM Receiver Basic Block Diagram

The “turnkey” approach to IFM Receiver Design

IFM

Receivers

he wide band IFM Receiver design integrates a Digital Frequency

Discriminator with RF amplitude digitizing (8-bit or 10-bit) circuits and

threshold circuits to provide a single, integrated assembly that includes all of

the necessary circuits to provide RF frequency, RF amplitude, RF envelope

pulse width, and Time Of Arrival data. It may also include FMOP, PMOP,

POP, CW Detection, and POCW flag outputs. These receivers employ an

internal 40MHz clock, which may be synchronized to an external 5MHz or

10MHz reference, improving TOA accuracy and allowing the

synchronization of multiple receivers.

lse width processing is via a Standard Video Processor which examines a u

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running serial sequence of amplitude data to locate the leading and trailing

edges of the RF envelope; this adapts automatically to fast or slow RF

envelope rise and fall times. Threshold is based on an internally sampled RF

SNR estimator, which ignores broad band noise inputs. This threshold may

also be programmed to a selected RF power level. In addition to the RF

input threshold power level, the CW time definition, TOA resolution, and

other parameters are also programmable via the serial RS-422/485 interface.

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0

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applicatiofrequen

data.exter

intern

IFM Receiver

Designed for a mobile ESM system n, this L band receiver provides RF

cy, amplitude, pulse width, and TOA This receiver incorporates both annal programmable threshold and anal automatic noise riding threshold.

This IFM receiver is provided in three bands:.5-2GHz, 2-8GHz, and 8-18GHz. As in the ESM

application, this receiver provides RF frequency, amplitude, pulse width and TOA

ta on a pulse by pulse basis. It also identifiesFMOP, PMOP, and CW signal events.

Designed for shipboard application, thisIFM Receiver covers the 6-18GHz band,

providing parametric data through a fast FIFO buffer, allowing a fast receiver to

interface to a slower computer.

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IFM/DFD Design Summary ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

DFD Frequency Accuracy vs RF SNR

ide Band Systems` main goal is to

provide reliable and produceable

IFM/DFD designs which both meet the

specifications and satisfy the system

design objectives. To accomplish this,

extensive design analysis of the basic

unit configuration is performed which

permits us to accurately predict the unit

performance. The chart at right

compares the design analysis

performance of a 2-6GHz DFD at low

RF SNR to the actual performance of a

finished unit.

comprehensive computer controlled

testing of the finished unit. The end

result is the reliable production of the

most technically advanced DFD/IFM

designs available for your system.

To learn morerequest appli

3Te

699

How to get more information…

hiT s design analysis is followed by the

extensive use of CAD (including

MICAD) of the stripline circuits,

ORCAD of the CCA, AUTOCAD of

the physical structure, and, finally,

about our capabilitcations assistance,

please get in to

89 Franklin Avenuelephone (973) 586-6

www.wideba

-1 Copyright © 1999 Wide

ies to meet your requirements, or to or system performance modeling, uch with us soon.

● Rockaway, NJ 07866500 ● Fax (973) 627-9190 ndsystems.com

Band Systems, Inc. Printed in U.S.A.