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| Microwave Motion Sensor Preliminary Data Description The KMY 24 is a microwave rader motion sensor based on the Doppler effect. It transmits a low energy microwave radiation at 2.45 GHz which is reflected by objects. If the object is moving relative to the sensor, a Doppler shift occurs. The shifted wave is mixed with the original wave in two mixers, resulting in two output voltage signals. The phase shift between these two signals is negative or positive depending on whether the target is approaching or receding from the detector. Features * * * * * * * * High sensitivity Dual Mixers enabling direction detecting High reliability Low power consumption Low harmonic emission Small size Light weight Low cost Marking KMY 24 Ordering Code Operating frequency Q62702-R323 2.45 GHz KMY 24 Engineering Sample Typ KMY 24 License No. BZT G127520H Pin Configuration 1 2 3 4 - VS (GND) VD1 (output voltage D1) VD2 (output voltage D2) + VS SIEMENS KMY 24 FG Notes: 1. Solder pads must not be perforated, as this will damage, 1234 EHA07260 and may destroy the multilayer PC Board. 2. Regulations on the use of High frequency devices. The use of high frequency devices is regulated in most countries and certain frequencies can be subject to restrictions. The use of the KMY 24 should be clarified with the respective authorities in each country to ensure compliance with the prevalent legislation. Semiconductor Group 1 1997-09-01 KMY 24 Absolute Maximum Ratings Parameter Operating temperature range Storage temperature range Supply voltage Electrical Characteristics at TA = 25 C Parameter Supply voltage Operating frequency Operating current Detecting range1) Amplitude of signal 1 Quotient of amplitude of 1 and 2 Phase difference Equivalent isotropic radiated power at fo Symbol min. Limit Values typ. 12 2.45 23 5...8 1) Symbol Top Tstg VS Limit Values - 20 ... + 60 - 30 ... + 80 15.6 Unit C C V Unit max V GHz mA m mV Degrees dBm VS fo Iop rop VD1 VD1/VD2 2 - 1 10.8 2.40 - - - - - - 15.6 2.48 - - - - - 2 8 40 ... 120 - EIRP 1) The amplitude of the signal depends on the object size and its distance from the detector. Measurements taken with 5 cm high, cylindrical metallic objects, moving in circles at a distance of 1 m for example, give signal amplitudes of typically VD1 = 40 mV. Semiconductor Group 2 1997-09-01 KMY 24 Output Signal The phase difference between VD2 and VD1 is positive, if the target is receding from the detector. ( 1 - 2 ) 0 EHA07261 VD1 VD2 Receding Ch1 10 mV Ch2 10 mV M 100 ms The phase difference between VD2 and VD1 is negative, if the target is approaching the detector. ( 1 - 2 ) 0 EHA07262 Approaching VD1 VD2 Ch1 10 mV Ch2 10 mV M 100 ms Semiconductor Group 3 1997-09-01 KMY 24 Typical Radiation Pattern The diagram shows the typical radiation pattern in the x-z- and y-z-planes. The z-direction is perpendicular to the patch antenna, x shows the longer and y the shorter side of the rectangular antenna. 0 0 dB -10 dB 60 -20 dB 90 30 EHA07263 Package Outline The outline of the package has, to date, not been determined. Semiconductor Group 4 1997-09-01 |
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