A 50 MHz-30 GHz Broadband CO-Planar Waveguide ——ieee论文: 50M30G.PDF

中文的发了很多，发点ieee上的论文。

Abstract-This  paper  reports  on  a  GaAs  PIN  diode  SPDT
switch design which achieves  45 dB of isolation up to 30 GHz. The
switch design  uses 2-pm-thick i-region  PIN's, a shunt-shunt-series
switch  topology  in  each arm,  and  a  quasi-coplanar waveguide
(CPW) design environment to achieve its superior isolation per-
formance. By employing CPW ground isolation with a microstrip
design, as much as 10-dB  improvement in  isolation performance
was observed at the upper band frequencies. The switch achieves
1.02-dB  insertion  loss and >  15-dB  input  and output return-loss
across  the  band.  In  comparison  to  previously  reported  GaAs
MMIC  PIN  diode  switches at millimeter-wave  frequencies,  this
design achieves state-of-the-art isolation performance.