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K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet

Features

 24 GHz short range monopulse transceiver

 Dual receiver +/- 15° angle coverage

 Beam aperture 30°/ 12° @ -3dB

 180MHz sweep FM input

 High sensitivity, integrated RF/IF amplifier

 Buffered I/Q IF outputs for both channels

 Temperature compensated oscillator

 RSW Rapid Sleep Wakeup for power saving

 Extremely compact: 78x98x7mm

construction

Applications

 Ranging, distance and direction finding measurements

 Traffic supervision and counting

 Object speed measurement systems

 Indµstrial sensors

Description

K-MC4 is a Doppler Transceiver with an

asymmetrical beam and two receiver

antennas. This configuration allows measuring

the angle of moving objects. This technique is

often simply called “Monopulse Radar”, but in

fact it is a “Phase-Comparison Monopulse”

technique.

Target deviation of +/-15° from main axis

results in a phase deviation of +/- 100° at the

IF outputs I1/I2 or Q1/Q2 respectively.

The unique "RSW" Rapid Sleep Wakeup func-

tion with <5µs wakeup time makes this module

ideal for battery operated equipment. Typical

duty cycle in RWS mode may be < 1% with full

movement detection capability by sampling the

IF signals.

An extremely slim construction with only 6mm

depth gives you maximum flexibility in your

equipment design.

A powerful evaluation kit ST200 is available.

Blockdiagram

Fig. 1: K-MC4 Blockdiagram

Rx2

Rapid Sleep Wakeup

4x100R

Tx Rx1

I,Q

I1,Q1

24.00..24.25GHz

20dB

I2,Q2

/Enable

FM Input

Temp. Compensation

LNA

Summary of content (14 pages)

PAGE 1
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Features          24 GHz short range monopulse transceiver Dual receiver +/- 15° angle coverage Beam aperture 30°/ 12° @ -3dB 180MHz sweep FM input High sensitivity, integrated RF/IF amplifier Buffered I/Q IF outputs for both channels Temperature compensated oscillator RSW Rapid Sleep Wakeup for power saving Extremely compact: 78x98x7mm3 construction Applications     Ranging, distance and direction finding measurements Traffic supervision and cou
PAGE 2
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Characteristics Parameter Conditions / Notes Symbol Min Typ Max Unit Vcc 4.75 5.00 5.25 V Operating conditions Supply voltage Supply current Module enabled (Pin 1 = VIL) Icc 180 Module RSW mode (Pin 1 = VIH) VCO input voltage VCO pin resistance 5 Uvco Internal pullup to 5V 1 Rvco mA 7 mA 10 V  10K Operating temperature Top -20 +80 °C Storage temperature Tst -20 +80 °C VIH Vcc -0.7 Vcc+ 0.3 V VIL -0.
PAGE 3
K-MC4 MONOPULSE RADAR TRANSCEIVER Parameter Datasheet Conditions / Notes Symbol Min Typ Max Unit TX vertical -3dB beamwidth E-Plane Wφ 12 ° TX horizontal -3dB beamwidth H-Plane Wθ 30 ° RX vertical-3dB beamwidth E-Plane Wφ 12 ° RX horizontal -3dB beamwidth H-Plane Wθ 40 ° Horiz. sidelobe suppression Dφ -20 dB Vert. sidelobe suppression Dθ -20 dB Rx1, Rx2 mechanical distance dRx 13.
PAGE 4
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Object Angle Phase Conditions A moving object generates Doppler Signals on both I and Q outputs. Phase relations between Ix an Qx indicate forward or backwards movements. Objects approaching the sensor generate 90° shift between Ix and Qx outputs. Objects moving away from the sensor generate -90° shift between Ix and Qx outputs. Phase relations between I1 an I2 or Q1 and Q2 indicate the object's deviation α from the 90° axis .
PAGE 5
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet FM Characteristics Frequency modulation allows FSK (Frequency Shift Keying) and FMCW (Frequency Modulation Continuous Wave) techniques for ranging applications. For optimal FMCW results, the VCO characteristic should be linearized by the driving software. f0 Fig. 4: Typical frequency vs.
PAGE 6
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Application Notes Using Monopulse Phase Comparison Features Using multiple antennas allows discrimination of the angle of moving objects. K-MC4 uses two receiver antennas Rx1 and Rx2. On the right half, there are the two receiver antennas shown in different colors. The angle detection happens in the horizontal plane as shown in the picture. The antenna layout results in a horizontal -6dB (IF voltage) beam width of 30° according to Fig. 2.
PAGE 7
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Using VCO and IF Outputs The IF amplifier provides two outputs per channel according to Fig. 1. These outputs are designed for different requirements in processing radar signals. Both I (imaginary) and Q (real) mixer signals are available. The I and Q signals are phase shifted by +90° or -90°, depending on the moving direction of objects in range.
PAGE 8
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Rapid Sleep Wakeup (RSW) RFbeam's unique rapid sleep wakeup feature allows power savings of more than 90% during 'silent' periods. The module may be used in a relaxed sampling mode as long as no movements are detected. RSW also helps saving power, if the full IF bandwidth is not needed. In battery operated equipment such as traffic control, RSW may significantly lower battery and equipment volume and cost.
PAGE 9
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Sampling Requirements Using RSW requires sampling of the IF signals during the active enable time. Normally, AD conversion and asserting /Enable signal on K-MC4 must be synchronized. If the ADC contains a sample-and-hold (S&H) device, sampling command can be fired at the end of the /Enable signal. Enable time ton must be > 5µs or > setup time of the S&H, whatever value is higher.
PAGE 10
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Integrators Information Installation Instruction Mechanical enclosure It is possible to hide the sensor behind a so called radome (short for radar dome) to protect it from environmental influences or to simply integrate it in the case of the end product. A radar sensor can see trough different types of plastic and glass of any colour as long as it is not metallized. This allows for a very flexible design of the housing as long as the rules below are observed.
PAGE 11
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet United States (FCC) and Canada (ISED) This module has been granted modular approval for fixed and/or mobile applications. The modular approval allows the end user to integrate the module into a finished product without obtaining subsequent and separate FCC/ISED approvals for intentional radiation, provided no changes or modifications are made to the module circuitry. Changes or modifications could void the user’s authority to operate the equipment.
PAGE 12
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Europe (CE-RED) This module is a Radio Equipment Directive assessed radio module that is CE complaint and have been manufactured and tested with the intention of being integrated into a final product. According to the RED every final product that includes a radio module is also a radio product which falls under the scope of the RED. This means that OEM and host manufacturers are ultimately responsible for the compliance of the host and the module.
PAGE 13
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Outline Dimensions Rx1 Rx2 Tx Fig. 10: Module dimensions module mounting side Module may be mounted on an optional mounting plate in 0° or 90° position: Fig. 11: Mounting plate © RFbeam Microwave GmbH, Schuppisstrasse 7, CH-9016 St.
PAGE 14
K-MC4 MONOPULSE RADAR TRANSCEIVER Datasheet Ordering Information Module Part #: K-MC4 Transceiver (includes Mounting Plate Type1) Datasheet Revision History Version 1.0 1.1 1.2 1.3 2.0 Date 2010-10-29 2011-04-18 2011-05-10 2011-05-26 2011-11-15 2.1 2.2 2.