High   Power   Pulse   Applications   like   phased   array   radar   and   laser   targeting   require   bulk  capacitance,  high  currents,  and  fast  response  time  for  pulse   forming.  EVANSCAPS,  Tantalum  Hybrid   Capacitors   from   Evans   Capacitor   Company   have   over   a   decade   of   experience   in  powering  these  systems.    EVANSCAPS  unique  chemistry  and  construction  provides  the  low  ESR  and  high  power  density  for   high   current   pulse   power   in   Phased   Array   Radars   or   LASER   drivers,   as   well   as   the  highest   available   energy  density   for  power   interruption  back  up   in   avionics   or   subsystems.  EVANSCAPS  save   space,  weight  and  power   (SWAP)  over  other   capacitor   technologies.  They  are  not  cycle  limited  and  can  provide  very  high  current  discharge. EVANSCAPS  are  available  in  a  very  wide  range  of  ratings  in  voltages  from  10V  to  125V.  

In   large   phased   array   radar   systems,   high  current   pulse   capability,   minimal   voltage   droop,  and  keeping   cool   are   a  necessity   for  driving  high  power   T/R   modules.   EVANSCAPS   THQ   and   THS  capacitors   have   been   the   pulse   generators   of  choice,   with   the   high   capacitance,   low   ESR   and  reliability   required   for   aggressive   applications.  The   TDD   series,   with   ultra   low   ESR   provides  improved   pulse   characteristics   and   excellent  frequency  response.    Reduced  heat  generation  and  

high   current   capability,   allows   higher   duty   cycles   or   increased   pulse   power.   The   lower   I2R  induced  heating   can  eliminate  external   cooling   requirements,   saving  weight   and   cost   in   the  overall  system.  Cooler  operation  results  in  longer  life.    EVANSCAPS  are  driving  the  highest  power  GaN  T/R  Modules  !    Gallium  Nitride   technology  provides   the   capability  of  very  high  power  T/R  modules.  The  higher  power  GaN  T/R   modules   require   large   bulk   capacitance,   higher  currents   and   faster   rise   times   to   realize   their   full  potential.     Evans   TDD   series   Hybrid     Capacitors   can  provide   the   input  pulse  current  and  power   to  realize  the  full  benefit  of  GaN  T/R  modules.  The  high  energy  density  of  TDD  EVANSCAPS  allows  more   capacitance  in   a   small   volume,   reducing   size   of   the   overall   T/R  power  module,  yet  providing  higher  power  pulse  and  

For  High  Power  Pulse  Applications  

E2D Advanced Hawkeye AN/APY-9 RADAR

EVANSCAPS Advanced Capacitors

for Demanding Applications  

aggressive   duty   cycles.   The   TDD   series   encompasses   a   unique   internal   construction   that  greatly  reduces  ESR,  providing  greater  efficiency  and  generating  less  heat,  The  excellent  heat  transfer  characteristics  allow  for  higher  currents  but  with  reduced  cooling  requirements.    EVANSCAPS  -­‐  driving  the  highest  power  solid  state  LASERS    

In  the  AIR  Advanced  Targeting  Pods  demand  high  power  solid  state   LASERS.   These   systems   require   bulk   energy  storage  and  very  high  discharge  currents  for  pulse  forming.   EVANSCAPS,   with   high   capacitance   and  very   low   ESR   provide   the   highest   currents   with  minimal   voltage   droop.     Hermetic   and   Tanatlum  encased,  EVANSCAPS  provide  reliable  power  in  the  most  demanding  environments    

                    On  the  GROUND  

Targeting   and   Designator  LASERS   require   the   highest  power   in   the   smallest   space.  EVANSCAPS  high   energy  density  provides  the  maximum  power  in  the  minimum  space.      EVANSCAPS  THQ,  THS,   and  TDD  style   capacitors   are   already   providing   high   current   pulse  power  for  ground  and  airborne  laser  targeting  systems.  The  TDD  series  capacitors  with  high  capacitance  and  very  low  ESR  support  the  largest  currents  with  minimal  voltage  droop.  The  low   inductance   design   facilitates   a   very   short   rise   time   and   good   frequency   response.   Low  ESR  at  -­‐40C  provides  improved  performance  over  the  entire  required  temperature  range.    Get  the  Highest  Power  in  the  Smallest  Possible  Space    TDD  series  capacitors  are  uniquely  designed  for   high   energy   density   and   low   ESR,  providing   small   size,   high   power   and   less  heat   generation   than   other   capacitor  technologies.    With  the  goal  to  provide  higher  specific   power   and   reduced   cooling  requirements,  the  TDD  series  was  developed  by   Evans   in   concert   with   a   major   defense  contractor   in   an   advanced   phased   array  radar   development   effort.   The   unique  internal   construction   of   the   TDD   design  reduced  the  already   low  ESR  of   the  previous  EVANSCAPS  models  by  50%,  resulting   in   faster  rise  times  and  greatly  reduced  cooling  requirements.  This  supports  even   larger  currents  and  

TDD2080602  80V  *  6,000µF  *  0.027Ω  *  <16cc  

F-­‐18  with  EO  SNIPER  ATP  

STORM  

LLDR  

more  aggressive  duty  cycles.  The  TDD  capacitors  enabled  the  system  design  for  higher  power  while   eliminating   the   cooling   requirement   for   the  Capacitors.   The  TDD   series  has  now  been  expanded  into  four  different  case  sizes  to  provide  a  wide  a  wide  capacitance  range  with  10V  to  125V  operation.  The  DLA  (DSCC)  has  issued  dwg  #15010  for  the  TDD  series  Hybrid  Capacitors.    

 Evans   Capacitor   manufactures   high   energy   density   capacitors   for   demanding   defense   and  aerospace   applications,   including   phased   array   radar,   laser   targeting   and   power   hold   up,  where  size,  weight,  and  reliability  are  the  major  considerations.    Evans'  production  facility  in  East   Providence,   RI,   follows   stringent   guidelines   for   quality   and   performance   and   is   ISO  9001:2008  and  AS9100  certified.  Hybrid  Capacitors  are  commodity  dual  use  EAR-­‐99  for  export  purposes.  Evans  is  ITAR  registered.    For  more  information  please  see:  http://www.evanscap.com/hybrid.htm  http://www.evanscap.com/TDD_product_page.html      For  questions  or  to  request  a  quote…  Email  us  at:      info@evanscap.com  Or  call  (401)  435-­‐3555            

EVANSCAPS  are  available  in  a  wide  range  of  configurations  and  ratings