24G雷达传感器CDM324C.pdf-资料库

CDM324C RADAR TRANSCEIVER Features          24 GHz K-band miniature I/Q transceiver 140MHz sweep FM input 2 x 4 patch antenna 2 balanced mixer with 50MHz bandwidth Excellent noise cancelling ability though I/Q technology Beam aperture 80°/34° 15dBm EIRP output power 25x25mm2 surface, <6.5mm thickness Lowcost desig Applications Security systems  Direction sensitive movement detectors   Object speed measurement systems Simple ranging detection using FSK  Industrial sensors  Description CDM324C Actual Size CDM324C is a 2 x 4 patch Doppler module with an asymmetrical beam for lowcost short distance applications. Its typical applications are move- ment sensors in the security and presence detection domain. In building automation this module may be an alternative for infrared PIR or AIR systems thanks to its outstanding performance/cost ratio. The module is extremely small and lightweight. With its IF bandwidth from DC to 50MHz it opens many new applications. FSK is possible thanks to the unique RFbeam oscillator design. This allows to use this lowcost module even in ranging applications. Powerful starterkits (ST100 and ST200) with signal conditioning and visualization on the PC's are available. Blockdiagram Tx Rx Fig. 1: Block diagram VCO 24 GHz I Q FM Input © www.relyking.com 2018-08-17 Page 1/6 Relyking Shenzhen Relyking Technology Co., Ltd

CDM324C RADAR TRANSCEIVER Characteristics Parameter Conditions / Notes Symbol Min Typ Max Unit Operating conditions Supply voltage Supply current VCO input voltage VCO pin resistance Operating temperature Storage temperature Transmitter VCO Pin open Driving voltage source Note 1 Transmitter frequency Frequency drift vs temperature Frequency tuning range VCO sensitivity VCO Modulation Bandwidth Output power Output power deviation Spurious emission Turn-on time VCO pin left open, Tamb=-20°C .. +60°C Vcc=5.0V, -20°C .. +60°C Note 2 f=20MHz EIRP Full VCO tuning range According to ETSI 300 440 Until oscillator stable, fTX < 5MHz Receiver Mixer Conversion loss Antenna Gain Receiver sensitivity Overall sensitivity IF output IF output resistance IF frequency range IF noise power IF noise voltage IF output offset voltage I/Q amplitude balance I/Q phase shift Supply rejection fIF = 1kHz, IF load = 1k fIF = 20MHz, IF load = 50 FTX=24.125GHz Note 3 fIF =500Hz,B=1kHz,RIF =1k,S/N=6dB fIF =1MHz,B=20MHz,RIF =50,S/N=6dB fIF =500Hz,B=1kHz,RIF =1k,S/N=6dB -3dB Bandwidth, IF load = 50 fIF =500Hz, IF load = 50 fIF =1MHz, IF load = 50 fIF =500Hz, IF load = 1k fIF =500Hz, IF load = 1k Full VCO range, no object in range fIF =500Hz, UIF = 1mVpp fIF = 1Hz - 20kHz Rejection supply pins to IF output Vcc Icc Uvco Rvco Top Tst fTX  fTX  fvco Svco BVCO PTX  PTX Pspur ton Dmixer1 Dmixer2 GAnt PRX1 PRX1 Dsystem RIF fIF PIFnoise1 PIFnoise2 UIFnoise1 UIFnoise1 UIF  UIF  Dsupply 5.0 35 570 4.75 -0.5 -20 -20 5.25 45 2.0 +60 +80 V mA V  °C °C 24.050 24.125 24.250 GHz -0.9 140 -55 3 +15 1 -6 -11 8.6 -96 -84 -111 50 -134 -164 -147 45 3 90 25 MHz/°C MHz MHz/V MHz dBm dBm dBm s dB dB dBi dBm dBm dBc  MHz dBm/Hz dBm/Hz dBV/Hz nV/Hz mV dB ° dB +17 +/- 1 -30 50 200 100 +12 0 -200 80 © www.relyking.com 2018-08-17 Page 2/6 Relyking Shenzhen Relyking Technology Co., Ltd

CDM324C RADAR TRANSCEIVER Parameter Antenna Conditions / Notes Symbol Min Typ Max Unit Horizontal -3dB beamwidth Vertical -3dB beamwidth Horiz. sidelobe suppression Vertical sidelobe suppression E-Plane H-Plane Body Outline Dimensions Weight Connector 5pin single row jumper W W D D -12 -12 80 34 -20 -20 25*25*6 4.5 ° ° dB dB mm3 g Note 1 The VCO input has an internal voltage source with approx. 0.9VDC. For driving this pin it is necessary to source and Note 2 Transmit frequency stays within 24.050 to 24.250GHz over the specified temperature range when the VCO pin sink current is left open Note 3 Theoretical value, given by Design Antenna System Diagram This diagram shows module sensitivity in both azimuth and elevation directions. It incorporates therefore the transmitter and receiver antenna characteristics. Horizontal 80° , vertical 34° at IF output voltage -6dB (corresponds to -3dB Tx power) 80° 34° Remarks: The broader the antenna, the narrower the beam. Fig. 2: System diagram © www.relyking.com 2018-08-17 Page 3/6 Relyking Shenzhen Relyking Technology Co., Ltd

CDM324C RADAR TRANSCEIVER FM Characteristics VCO Voltage generates an output signal even without an object in range because of the finite isolation between transmitter and receiver path. This effect is called self-mixing and leads to a DC signal that depends on the carrier frequency. Mixer offset voltages are also dependent on production tolerances. Pin Configuration Pin 1 2 3 4 5 Description IF Q output VCC IF I output GND VCO in Typical Value load 1kOhm 5VDC supply load 1kOhm ground Open = f0 1 Outline Dimensions Fig. 3: Mechanical data © www.relyking.com 2018-08-17 Page 4/6 Relyking Shenzhen Relyking Technology Co., Ltd

CDM324C RADAR TRANSCEIVER Application Notes Sensitivity and Maximum Range The values indicated here are intended to give you a 'feeling' of the attainable detection range with this module. It is not possible to define an exact RCS (radar cross section) value of real objects because reflectivity depends on many parameters. The RCS variations however influence the maximum range only by 4  . Maximum range for Doppler movement depends mainly on: S: - Module sensitivity - Carrier frequency f0: - Radar cross section RCS ("reflectivity") of the object 1): -111dBc (@0.5kHz IF Bandwidth) 24.125GHz 1m2 approx. for a moving person >50m2 for a moving car note 1) RCS indications are very inaccurate and may vary by factors of 10 and more. The famous "Radar Equation" may be reduced for our K-band module to the following relation: r  .0 0167  s 4010 4  Using this formula, you get an indicative detection range of - >10 meters for a moving person. - >26m meters for a moving car Please note, that range values also highly depend on the performance of signal processing, environment conditions (i.e. rain, fog), housing of the module and other factors. For simple detection purposes (security applications e.g.) without the need of speed measurements, range may be enhanced by further reducing the IF bandwidth. With 250Hz bandwidth and a simple comparator, we get already a 20m detection range. Datasheet Revision History Version 1.0 1.1 1.2 1.3 1.4 1.5 1.6 2.0 Date Aug-2008 Oct-2008 Apr-2009 May-2009 June-2009 May-2011 April-2014 July-2014 Changes Preliminary release Replaced diagram FM characteristics Replaced Fig. 4. Changes dual 4 patch to single 4 patch antenna Fig. 1 changed blockdiagram Updated System diagram Cosmetic text correction Fig. 2 System diagram comments added New antenna design starting from production lot 1421. Better sensitivity. © www.relyking.com 2018-08-17 Page 5/6 Relyking Shenzhen Relyking Technology Co., Ltd

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