Textbook Study Note, Active Microwave Circuits

U. L. Rohde and D. P. Newkirt, RF/Microwave Circuit Design for Wireless Applications, Wiley, 2000

 

Chapter 1 Introduction to Wireless Circuit Design

 

1-1 Overview

Wireless circuits

Cellular telephone technology: handsets, base stations

 

1-2 System Functions

FM(frequency modulation)

PM(phase modulation)

SSB(single-sideband): high linearit, classs A amp

TDMA(time-division multiple access)

 

Mobile handset:

- Block diagram

 

 

- P83CL580: 80C51 8-bit MCU

- UMA1002: baseband (data) processor

- SA606: cellular radio FM IF, RF > 500MHz, IF 44.545MHz

- SA601: LAN + mixer, 0.2-1.2GHz

- UMA1015: 0.4-1.1GHz synthesizer, dual output

- SA5753, SA5752: audio processor, microphone preamp + VOX + compressor + expandor

- TDA 7050: audio power amp

1) Receiver Chain

* RF front end SA601: 800-1200MHz, 1.6dB NF, 11.5dB gain, -2dBm IP3, 3V 7.4mA

* IF Demodulator SA605

 

* Data Processor UMA1002

 

*

- Antenna

- Duplex filter

- RF front end: preamplifier + filter + mixer, cascode for preamp

     * Cascode amp: CE+CB amp; high input-output isolation, high Zin and Zout, high bandwidth (due to the elimination of the Miller effect)

 

        

      * Class A amp

     

     

      * Duplexer

        Figure 9. Comparison of measured filter responses for PCS SAW duplexer.Advanced Crystal Technology ACTF8156 897.5MHz 897.5MHz SAW Filters for Mobile Radio / Walkie Talkie

 

      * SAW filter by Murata

           saw filter handset murata 이미지 검색결과