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SiPSoC Integration of RF SAWBAW Filters

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SiPSoC Integration of RF SAWBAW Filters Powered By Docstoc
					SiP/SoC Integration
 of RF SAW/BAW
      Filters
         Ken-ya Hashimoto
             Chiba University
             k.hashimoto@ieee.org
      http://www.em.eng.chiba-u.jp/~ken
                                          1
   Integration trends in mobile
      phones, RF-subsystem
• dual band
• >200 L-R-Cs    • triple band
• 10 ICs         • 100 L-R-Cs     • quad band
• 4 RF-filters   • 3 ICs          • 30 L-R-Cs
• 1 IF-filter    • 3 RF-filters   • 2 ICs          • quad band + UMTS
                 • no IF-filter   • 4 RF-filters   • 20 L-R-Cs
                                                   • 1 IC
                                                   • 6 RF-filters




                                                               ?


                                                                        2
   Contents
   Contents
• RF SAW and BAW Devices
• Front-End Modules
• SiP/SoC Integration
• Variable Filters




                           3
   Contents
   Contents
• RF SAW & BAW Filters
• Front-End Modules
• SiP/SoC Integration
• Variable Filters




                         4
      SAW Resonator Filter
               Interdigital Transducer
               (IDT)
                                  Reflector (Al)




Piezo-Substrate (42oYX-LiTaO3)


    • Mass Production by Photolithography
    • High Frequency, Low Loss, High Stability
    • Cheap(?), Small(?)

                                                    5
Ladder-Type SAW Filter
Ladder-Type SAW Filter
           • Low Loss
           • High Power Durability
           • Moderate Out-of-Band Rejection




                    Topology

                                      6
   Antenna Duplexer for US PCS
               strip line SAW filter, TX
                   /4
Tx Band                                    TX-port

    Antenna-
    port       strip line SAW filter, RX
                   /4
Rx Band                                    RX-port




                                                 Fujitsu FAR-
                                                 D6CZ-1G9600-
                                                 D1XC        7
Double Mode SAW (DMS) Filter
                                                         Symmetrical
                                                           & Anti-
                                                         symmetrical
                                                         Resonances
                      Electrically Isolated I/O

                          s     a           • Good Out-of-Band
Insertion loss (dB)




                           r      r
                                                Rejection
                                              • Balun Function
                                              • Transformer Function
                                              • Lower Power Durability

                       Frequency                                 8
Performance of Double-Mode SAW Filter
Performance of Double-Mode SAW Filter

                                    0                                  0




                                                                       Scattering parameter. S21 [dB]
     Scattering parameter. S21 [dB]

                                  -10                                 -1
                                  -20                                 -2
                                  -30                                 -3
                                  -40                                 -4
                                  -50                                 -5
                                  -60                                 -6
                                  -70                                 -7
                                  -80                                 -8
                                     800   850   900 950 1000 1050
                                                 Frequency [MHz]
                                             Fujitsu FAR-F5EB-942M50-B28E                               9
Balanced/Unbalanced Transmission
Balanced/Unbalanced Transmission
                                     +
                                     -

   Unbalanced Input and Output
                                 +
                                 -
   Balanced Input and Output



                                         10
Embedded Balun in Interstage SAW
 Front-end     Inter-stage
 BPF       LNA BPF        Balun Mixer LPF   IF-Amp




Embedded Balun in Frontend SAW
   Front-end    Inter-stage
   BPF      LNA BPF       Mixer LPF   IF-Amp


                                               11
DMS Filter (Ideally No Common Signal)
 Acoustically Coupled but Electrically Isolated

   Vin                                       Vout+



                                             Vout-

    Common Signal Generation by Parasitics

                                                     12
Z-conversion by DMS Filter
                             Vout+

  Vin

                             Vout-
        Vin


                         Vout+
                         Vout-
                                     13
Film Bulk Acoustic Resonator, FBAR

Piezoelectric Thin Film (AlN)
            resonator

 Si
              cavity



                                 14
Avago’ FBAR PCS
Duplexer
ACMD-7402 (3.8*3.8*1.3mm)




                            15
Merits of FBAR Filters
• Higher Q (Lower IL, Sharper TB)
• Better Power Handing
• Robustness Against Electrostatic-Discharge
• RF Integration Possibilities
Advantageous for Above 2 GHz Applications

Demerits
• Higher Price
• Balun & Z-Conv. Functions Not Realized
• Only Applicable to Huge Markets
                                           16
Cascaded Coupled FBAR Filter
Cascaded Coupled FBAR Filter




                 Electrically Isolated I/O
                                                    By Infineon

G. G. Fattinger, et al., IEEE Microwave Symp. (2004) pp.927-930
                                                             17
FBAR with Balun & Transformer Func.




    




                   By Infineon
                                   18
  Filter Response for Wireless LAN
                          0
                                                   FBAR filter
      Attenuation (dB)   -10

                         -20                         SAW filter
                                                                  Fujitsu
                         -30                                      Labs
                         -40

                         -50
                           4.5    5.0        5.5          6.0
                                 Frequency (GHz)

Influence of Electrode Resistance Obvious for SAW at
5 GHz Range
      FBAR Beneficial over 2 GHz?                19
Acoustic Migration
Acoustic Migration
 Stress-Induced Movement of Grain
 Boundary  Electrode Shortage




 Countermeasure: Development of New Electrode
 Material System

   Electrode Scarcely Stressed in BAW Case
                                                20
Wideband and Low Loss SAW Filter Using
Cu/15oYX-LiNbO3 Structure
                        0
                        10
  Insertion loss [dB]




                        20
                        30
                        40
                        50
                        60
                          0.7   0.8   0.9    1       1.1   1.2   1.3
                                      Frequency, f [GHz]
Not achievable performance by current FBAR                             21
      Bandwidth Control by Modified
      Ladder Configuration
                 res1    res3'     res3'   res1

         input                    res4             output
(a)
                        res2      res2'    res2


                         res4’

                 res1    res3''    res3     res1
(b)

                        res2''    res2''   res2
                                                            22
Wideband and Low Loss SAW Filter Using
Cu/15oYX-LiNbO3 Structure (Continued)
                        0
                       10
 Insertion loss [dB]




                       20
                       30
                       40
                       50
                       60
                         0.7   0.8   0.9    1       1.1   1.2   1.3
                                     Frequency, f [GHz]
                       Bandwidth Reduction by New Design              23
   Contents
   Contents
• RF SAW & BAW Filters
• Front-End Modules
• SiP/SoC Integration
• Variable Filters




                         24
                          RF-IC from Analog
Othello-G Chip (5x5mm2)
                          Devices       25
Avago’s UMTS2100
Front End Module
AFEM-7708 4 471.1 mm3




                          26
     Triquint’s PAiD (TQM676011)




M.Solal, et al., “Some Recent Advances in SAW Duplexers and PA Duplexers Modules” , 3rd
                                                                                  27
Intern. Symp. on Acoustic Wave Devices for Future Mobile Communication Systems, 2D-1 (2007)
            Merit of PAiD
•   Miniaturization
•   Optimal Placement for Components
•   User Friendly
•   Co-Design Taking Nonlinearity, Complex Z,
    and Z Variation of PA into Account



                                           28
 Balanced RX




OB Rejection Improvement
by Using DMS Filters
 M.Solal, et al., “Some Recent Advances in
 SAW Duplexers and PA Duplexers
 Modules” , 3rd Intern. Symp. on Acoustic
 Wave Devices for Future Mobile
                                    29
 Communication Systems, 2D-1 (2007)
Skyworks' Single Packaged Radio
BiCMOS Base for EGSM900 + DCS1800
                             HBT (GaAs)




                             SAW
                                            External
                                            C*2+Xtal


                             pHEMT (GaAs)       30
       6026:1010mm2
                       Polaris 2 Total Radio
       3178: 78mm2
                       by RF Micro Devices
                      SAW+SiGe+CMOS




                                          31
GaAs HBT
Polaris II
SMD SAW+SiGe, CMOS Chip




                          32
Miniaturized
FEM Employing
WLP SAW &
RF CMOS


 B.Wilkins, “Wafer Level
 Packaging of SAWs Enables
 Low Cost 2.5G and 3G Radio
 Modules” , 3rd Intern. Symp.
 on Acoustic Wave Devices for
 Future Mobile Communication
 Systems, 3B-3 (2007)


                        33
Miniaturized
FEM Employing
WLP SAW &
RF CMOS
  B.Wilkins, “Wafer Level
  Packaging of SAWs Enables
  Low Cost 2.5G and 3G Radio
  Modules” , 3rd Intern. Symp.
  on Acoustic Wave Devices for
  Future Mobile Communication
  Systems, 3B-3 (2007)


                      34
Configuration in Next Generation
                           •Large SAW
                           Filter Count
                           •Use of SP9T
                           SW
                            U.Bauernschmitt, et
                            al., “RF Front-Ends
                            for Multi-Mode, Multi-
                            Band Cellular
                            Phones” , 3rd Intern.
                            Symp. on Acoustic
                            Wave Devices for
                            Future Mobile
                            Communication
                            Systems, 3B-2 (2007)


                                              35
   Contents
   Contents
• RF SAW & BAW Filters
• Front-End Modules
• SiP/SoC Integration
• Variable Filters




                         36
 SOC Integration




                                                   By Infineon




L. Elbrecht, et al., IEEE Microwave Symp. (2004) pp.395-398   37
         CMOS/BAW-SoC?
•FBAR Fab. After IC Fab.  SoC Beneficial
•No Bonding Pad  SoC Beneficial
•Difference in Fab. Process  SiP Beneficial
•Different Yield Difficulties  SiP Beneficial
•Film Thickness Control for Each Frequency 
SiP Beneficial
•Size Reduction by High Z Design
•Digital Compensation Possible?                38
    RF Front End FBAR Integration




M.A. Dubois, et al., IEEE J. Solid State Circuits, Vol. 41
                                                          39
(2006) pp. 7-16
 Performances of Integrated FBAR




Balanced Topology Offers Improved OB Rejection
                                          40
Integrated FBAR VCO

                      M.A.Dubois, et al.,
                      “Above-IC
                      Integration of BAW
                      Resonators and
                      Filters for
                      Communication
                      Applications” , 3rd
                      Intern. Symp. on
                      Acoustic Wave
                      Devices for Future
                      Mobile
                      Communication
                      Systems, 2B-3
                      (2007)

                                 41
Phase Noise of Integrated FBAR VCO




M.A.Dubois, et al., “Above-IC Integration of BAW Resonators and Filters for Communication
Applications” , 3rd Intern. Symp. on Acoustic Wave Devices for Future Mobile Communication
                                                                                   42
Systems, 2B-3 (2007)
   Contents
   Contents
• RF SAW & BAW Filters
• Front-End Modules
• SiP/SoC Integration
• Variable Filters




                         43
               RF-SiP/SoC
•   Miniaturization, Multi-Functional, Low Loss
•   Reduction of Influence of Parasitics
•   Optimal Design for Particular Devices
•   Giving Controllability to Passives By
    Combining with Actives

 Adjustability for Digital Compensation and
 Variable Filters


                                             44
       Reconfigurable Front-End

            RF-BPF
                        LNA



            RF-BPF
                        PA



Low Loss, Narrow TB, Temperature
Stable & Variable Filters Realizable?   45
     Possible Variable Filters
• Ferromag. Resonance Based
 Bulky & Non-Linearity (IMD)
• Tuned LC (L, M-Strip, Ferroelec., etc.) Based
 Low Q (High Loss, Gradual TB), Bulky
• Active Circuit Based
 Non-Linearity (IMD)
• Acoustic Resonator Based
 Small Adjustability (?)
• Dielectric Resonator Based
 Bulky (?)
                                                  46
Switching RF Configuration

              LNA




        MEMS SW


              PA


                             47
    MEMS-Based Resonator Filter




Wideband, RF Operation & Low Z Possible?
         Use of Ferroelectric Piezo Film
Or Low Loss & Wideband Z Transformer 48
Possible Variable Bandwidth Filter
Based on Passband Width Reduction

         res1   res3”    res3”   res1
 input                                  output
                res3’    res3’
                        res4'    res2
         res2
                        res2'



                                                 49

				
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