WAVEGUIDE TRANSCEIVERS
TM
®
Fixed Frequency
MDU19xx Series
Features
Low cost
Standard Waveguide output
Rugged, Reliable Construction
Low Power Consumption
High Sensitivity
Description
The MDU (Motion Detector Unit) is an X-Band
microwave transceiver that utilizes the Doppler shift
phenomenon to "sense" motion.
The unit, contained in a rugged diecast housing,
features a dielectric resonator stabilized FET oscillator,
which provides stable operation over a broad
temperature range in either CW or low duty cycle pulse
mode. The unit is available as a “transmit only” unit,
with a single mixer or with a pair of orthogonal mixers
for direction sensing applications.
Applications
Traffic Control
Automatic Door Openers
Speed Measurement
Direction of motion detection
Energy Management Systems
Sports Radar Guns
This document only gives a general description of the product and shall not form part of any contract.
Microwave Solutions pursue a policy of continuous product improvement and reserve the right from time to time to amend the specifications of products.
Copyright
2008
Rev: 2009-02-10
Microsemi
Microwave Products
Page 1
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
WAVEGUIDE TRANSCEIVERS
TM
®
Fixed Frequency
MDU19xx Series
Operation
The basic principle of operation consists of detecting the frequency shift between a transmitted and a received
signal reflected back from a moving object within the field of view of the unit.
The MDU1900 unit produces two low level output signals which can be amplified and processed to provide an
audible or visual alarm. These signals are nominally orthogonal in phase and the direction of the detected
target can be ascertained from the lead/lag between the two outputs
The MDU1910 unit produces a single low level output signal which can be amplified and processed to provide
an audible or visual alarm.
The MST1950 unit includes the transmitter only and can be used with a separate receiver as one end of a
microwave link.
All the units employ low cost surface mount manufacturing techniques which are field proven as being rugged
: +5V
±0.25V
: 60mA max.
: 50mA typ.
Frequency
: see table
Frequency Setting Accuracy : 3MHz
: 3MHz/V
Frequency Pushing (Max)
Power Output
MDU1900/MDU1910
: +7dBm (Typ)
MDU1900/MDU1910
:+10dBm (Typ)
Power Variation
: 3dB/v (Max)
: < -7dBm
Harmonic Emissions
Pulse Mode Operation
Average Current (5% DC)
: 2mA typ.
Pulse Width (Min.)
: 5µSec Duty
Cycle (Min.)
: 1%
Receiver
: >1000µV p-p Noise
Output Signal*
: <150µV p-p
(Both in 3Hz to 80Hz bandwidth)
* With standard test system
Output Connection
Waveguide
:WG16/WR90/R100
Waveguide Flange
:UBR100
Model
MDU1900
MDU1910
MST1950
Application
Dual Orthogonal
Mixers
Single Mixer
Transmit Only
Order Code
C950503
C950501
C960503
C960501
C970503
C970501
Electrical Characteristics
Transmitter
Operating Voltage
Operating Current (CW)
Mechanical Characteristics
Weight
: 85 grams
Tab Connections
: 0.1” spacing
Environmental Characteristics
Power Drift
(over operating temp. range) : 3dB
Frequency Drift
(over operating temp. range) : 10MHz Operating
Temperature :
-10ºC to +55ºC Storage
Temperature :
-30ºC to +70ºC
NOTES Detection range is dependent on size and reflectivity of
target and S/N ratio Doppler shift at 10.587GHz is 31Hz/m.p.h.
Unit functions over -30ºC to +70ºC with reduced performance
Outline Drawing
Frequency
10.525GHz
10.587GHz
10.525GHz
10.587GHz
10.525GHz
10.587GHz
Comments
Holland, Belgium, Italy, USA
UK
Holland, Belgium, Italy, USA
UK
Holland, Belgium, Italy, USA
UK
Copyright
2008
Rev: 2009-02-10
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 2
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