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Transistor Application Selection Guide
Active Mixer
 
  RF to 900 MHz RF to 2.5 GHz RF to 6 GHz RF to 18 GHz
  HBFP-0420 gen. pur. 3V gen. pur. 3V gen. pur. 3V  
  AT-320xx gen. pur. 3V gen. pur. 3V    
  AT-310xx gen. pur. 3V gen. pur. 3V    
  AT-415xx gen. pur. 3-8V gen. pur. 3-8V    
  AT-420xx high IP 3-8V high IP 3-8V    
  HBFP-0405 low current 3V low current 3V low current 3V  
  AT-305xx low current 3V low current 3V    
           
  ATF-10xxx   gen. pur. GaAs gen. pur. GaAs  
  ATF-13xxx   gen. pur. GaAs gen. pur. GaAs gen. pur. GaAs
  ATF-21xxx   pwr GaAs pwr. GaAs  
  ATF-25xxx   high Vbr high Vbr  
  ATF-26xxx   high Vbr high Vbr  
  ATF-36xxx       PHEMT
           
  markets Cellular & Cordless
900 MHz ISM
  LAN/modem
  RF Tag & reader
Mobile Radio (SMR)
CATV
pagers / messaging 		GPS (1.5 GHz)
PCN (1.8 GHz)
USPCS (1.9 GHz)
MMDS (2 GHz)
2.4 GHz ISM
  LAN/modem
  RF Tag & reader 		TVRO (4 GHz)
WLL (4 GHz)
5.8 GHz ISM
  LAN/modem
  RF Tag & reader 		DBS / DSS (12 GHz)
VSAT (12 GHz)

Function:
mix down converter
mix up converter 		shifts frequency of operation.

A junction of a BJT or FET can be used to produce a "single diode" unbalanced mixer for frequency conversion, typically with higher gain and lower NF than provided by passive diodes.

 
Operation: Bias at turn-on input matched to S11* output matched to S22*
 
Key Parameters NF: 2 to 20 dB  
and ranges: Conversion Gain: 0 to 15 dB  
  I IP3: -20 to +10 dBm  

Alternatives:

Integrated Circuit Mixers
Discrete Schottky Diodes


 
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