A Monolithic GaAs PIN Switch Network For A 77 GHz ——ieee论文: A MONOLITHIC HIGH POWER Ka BAND PIN SWITCH.PDF

Abstract
This  paper  presents  the  design,  fabrication,  and
performance of  a  77 Ghz monolithic GaAs PIN
switch  network  developed  for  an  automotive
collision warning radar.  The RF  front end of the
radar  contains  three  control  circuits which were
initially  realized  by  a  hybrid  approach  using  a
duroid circuit and beam  lead  diodes. These three
circuits were  successfully integrated into a  single
77 Ghz MMIC.  The MMIC uses vertical GaAs
PIN  diodes with  a  switching cutoff  frequency of
over  3000 Ghz,  attaining  low  insertion  loss  and
high  isolation. Insertion loss is comparable  to that
obtained with a hybrid circuit, while the  isolation
improved  from  a  typical  level  of  16  dB  for  a
single hybrid switch to over 25 dB  in  the MMIC.
The  use  of  GaAs  PIN  diodes  also  allowed
switching speeds of less than 2ns to be attained, a
key requirement for the radar.

感谢楼主，收藏！