mdu1020 series microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 1 planar transceivers fixed frequency tm ? copyright ? 2008 rev: 2009-02-10 features ? low cost ? small and flat profile ? rugged, reliable construction ? low power consumption ? high sensitivity ? meet fcc part 15 reqts. description the mdu (motion detector unit) is an x-band microwave transceiver that utilizes the doppler shift phenomenon to "sense" motion. the unit is available with either of two physically interchangeable forms; a rugged cast metal housing or a lightweight plastic housing. the circuit 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 and a balanced mixer for enhanced sensitivity and reliability. applications ? intrusion alarms (room, vehicle) ? automatic door openers ? speed measurement ? collision avoidance ? traffic control ? presence sensing this document only gives a general description o f the product and shall not form part o f any contract. microwave solutions pursue a polic y o f continuous product improvement and reserve the ri g ht from time to time to amend the specifications o f products.
mdu1020 series microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 2 planar transceivers fixed frequency tm ? copyright ? 2008 rev: 2009-02-10 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 unit produces a low level output signal which can be amplified and processed to provide an audible or visual alarm signal and employs low cost surface mount manufacturing techniques which are field proven as being rugged and reliable. electrical characteristics transmitter frequency : see table frequency setting accuracy : 3mhz power output (min.) : 13dbm eirp operating voltage : +5v 0.25v operating current (cw) : 60ma max. : 40ma typ. harmonic emissions : < -7dbm pulse mode operation average current (5% dc) : 2ma typ. pulse width (min.) : 5sec duty cycle (min.) : 1% receiver sensitivity (10db s/n ratio) : -86dbm noise : 10v (both in 3hz to 80hz bandwidth) antenna gain : 8dbi -3db beamwidth e plane : 72o h plane : 36o mechanical characteristics weight : see table tab connections : 0.1? spacing environmental characteristics power/temp. coefficient (over operating temp. range) : 3db frequency/temp. coefficient (over operating temp. range) : 6.5mhz 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 10.687ghz is 31hz/m.p.h. unit functions over -30oc to +70oc but harmonics may exceed specified levels. model application order code frequency weight comments mdu1020 usa, canada etc. c900505 C900503 c900506 10.515ghz 10.525ghz 10.535ghz 80 grams usa fcc part 15 indoors metal housing mdu1020 usa, canada etc. c900605 c900603 c900606 10.515ghz 10.525ghz 10.535ghz 15 grams usa fcc part 15 indoors plastic housing
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