Sensor for cellular activity Supervised by : Yossi Hipsh Preformed by : Assaf Haim Ohad Fremder

Creating a sensor for a specific cellular device We will detect the presence of a specific working cell phone in the class room (cellcom), by using an Energy Detector.

Specific Device, Max R Room area 4x8 3m 6m supervisor Relevant area R max = 5.7m

Meeting project’s goals

Room Presentation Room area 4x8 3m 6m supervisor Relevant area

Antenna We use multi-beam antennas, with 3 beams, so we will be able to get a direction from each antenna. The desired opening angle for the antennas is degrees. -9db line Relevant area

The specific System

Pre-Conditions The cellular device works at a frequency – 1.7 – 1.9 Ghz  Bw = 200Mhz We require a 10db for SNR After an experiment we concluded that the device is emitting a: Pin = -30dbm R=30cm  R=5.7m  Pin =~ -56dbm For the detector we demand Pin(min)=12dbm Gain needed = = 68db (At least)

The system H.Pass 1.7Ghz Antenna L.Pass 1.9Ghz 20db L.O 1.5Ghz Mixer 26db Energy Detector L.Pass 400Mhz -1db -7db -1db 20db

Amplifier-1 ( GHz) SGA-4563(Z) DC-2500 MHz Silicon Germanium HBT Cascadable Gain Block Product Features DC-2500 MHz Operation Single Voltage Supply High Output Intercept: +27.1dBm typ. at 850MHz Low Noise Figure: 1.9 dB at 850 MHz Low Current Draw: 45mA at 3.6V typ.

Amplifier-2 ( MHz) SGA-4563(Z) DC-2500 MHz Silicon Germanium HBT Cascadable Gain Block Product Features DC-2500 MHz Operation Single Voltage Supply High Output Intercept: +27.1dBm typ. at 850MHz Low Noise Figure: 1.9 dB at 850 MHz Low Current Draw: 45mA at 3.6V typ.

Antenna We will use a dipole isotropy antenna. (with lamda/4 length) Rf = 1.797Ghz Transmition Line 4.17cm=

Mixers Features SURFACE MOUNT MIXER Frequency Range: LO & RF 80 – 2500 MHz, IF DC – 1000 MHz L.O. Drive : +7 dBm Industry Standard SMT package Available in Tape-and -Reel Low Cost Description The MXJ is a low-medium drive level, surface mount mixer designed for applications that require small, low cost and highly reliable surface mount components. This mixer is a double/double-balanced design for wideband, high dynamic range use in communications up and down-converter applications.

Local Oscillator VCO U(Y) High Performance Signal Source Product Features Low Cost Single Supply Operation Low Power Consumption Monotonic Tuning Across Entire Operating Band Low Phase Noise Operation Guaranteed at 0V Tune Voltage VCO T(Y) High Performance Signal Source Product Features Low Cost Single Supply Operation Low Power Consumption Monotonic Tuning Across Entire Operating Band Low Phase Noise Operation Guaranteed at 0V Tune Voltage

Filters Low Pass  CERAMIC LOW PASS DC to 5400 MHz High Pass  CERAMIC HIGH PASS 1300 to 7000 MHz

Energy - Detector Energy detector Spec.

Antennas angles 2m 6m 2m ~5.7m

Antenna