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Smart Device RF & Antennas

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Smart Device RF & Antennas

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Smart Device RF & Antennas

  1. 1. Smart Device RF & Antennas Yong Heui Cho @ Mokwon University
  2. 2. 2 Smart Device Structure 7. Android – Phone Calls 8. Introduction to IoT 9. Smart Device RF & Antennas 10. Introduction to RTOS
  3. 3. 3 3G & 4G Comparison Attribute 3G 4G Major Characteristic Predominantly voice- data as add-on Converged data and VoIP Network Architecture Wide area Cell based Hybrid – integration of Wireless LAN (WiFi), Bluetooth, Wide Area Frequency Band 1.6 - 2.5 GHz 2 - 8 GHz Component Design Optimized antenna; multi- band adapters Smart antennas; SW multi- band; wideband radios Bandwidth 5 – 20 MHz 100+ MHz Data Rate 385 kbps - 2 Mbps 20 – 100 Mbps Access WCDMA/CDMA2000 MC-CDMA or OFDM Forward Error Correction Convolution code 1/2, 1/3; turbo Concatenated Coding Switching Circuit/Packet Packet Mobile top Speed 200 km/h 200 km/h IP Multiple versions All IP (IPv6.0) Operational ~2003 ~2010
  4. 4. 4 RF Transmitter (Tx)  )cos()cos( 2 1 )cos()cos( yxyxyx  BBf BBLO ff  BBLO ff   • Superheterodyne • Up-conversion: frequency
  5. 5. 5 RF Receiver (Rx) • Down-conversion: frequency  )cos()cos( 2 1 )cos()cos( yxyxyx  BBfBBIF ff BBLO ff  IFLO fff  IFff  
  6. 6. 6 Simple Model for Antenna • Antenna: I ↔ E, H
  7. 7. 7 First Cell-phone • Dr. Martin Cooper in Motorola Thin phone: 7.1 [mm] Motorola RAZR
  8. 8. 8 Intennas for 3G Phone • Internal antenna: The antenna is in a phone. You can’t see it. • A metal pattern is served as an antenna.
  9. 9. 9 Smartphone Antennas ←raymaps.com
  10. 10. 10 Smartphone HW: AP • Application Platform Chip – AP: Application Processor – Flash memory – Mobile Dynamic RAM – PMU: Power Management Unit – Audio Codec – Bluetooth – WiFi
  11. 11. 11 Smartphone HW: CP • Connectivity Platform Chip – CPU: Central Processing Unit – DSP: Digital Signal Processing • RF baseband processing • Voice processing – PA: Power Amplifier – Tx-Rx switch – DAC + ADC
  12. 12. 12 Openmoko Project • Open source mobile phone project UART: Universal Asynchronous Rx/Tx SDIO: Secure Digital I/O GPIO: General Purpose I/O I2C: Inter-Integrated Circuit
  13. 13. 13 Nexus5 Block Diagram

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