here is the DC_simulation &AC_simulation with ADS.
the warning is still the same!!~
Simulation / Synthesis Messages
Warning detected by hpeesofsim during DC analysis `DC1'.
Matrix is singular (detected at node or branch `Q1.L9.i').
Warning detected by hpeesofsim during DC analysis `DC1'.
Circuit converged after a virtual resistance of 1 TOhms
was added between each node and ground, and a virtual
resistance of 1 pOhms was inserted in each current branch.
Possible causes include floating nodes or missing ground.
Status / Summary
hpeesofsim (*) 350.500 Feb 19 2009 (built: 02/19/09 22:31:44)
Copyright Agilent Technologies, 1989-2008.
DC DC1[1] <C:\users\default\X_prj\networks\s_parameter>
.
..
DC convergence achieved in 79 iterations.
AC AC1[1] <C:\users\default\X_prj\networks\s_parameter> freq=(2 GHz->16 GHz)
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Resource usage:
Total stopwatch time: 1.30 seconds.
-------------------------------------------------------------------------------
Simulation finished: dataset `s_parameter' written in:
`C:\users\default\X_prj/data'
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what should i do???help plz.