cuty81
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
Hi,
Anyone has experience with CPW T-junction, please help me! I'm trying to design a SPDT at the center frequency is 20 Ghz in HFSS with the CPW configuration! the problem is that, I put 2 MEMS switches at the output arms with quarter wavelength distance from the T-junction, but I don't know how about the input port for the T-junction?? The ouput ports and input port are 50ohm. Do I have to match the input port??? Even though I match the input port, the result is not good! (S11 is about -6dB, so high for a SPDT using MEMS switches!)
If anyone also has experience with building air bridges at the CPW T-junction, please help me how to work with that!
Thanks in advance!
Anyone has experience with CPW T-junction, please help me! I'm trying to design a SPDT at the center frequency is 20 Ghz in HFSS with the CPW configuration! the problem is that, I put 2 MEMS switches at the output arms with quarter wavelength distance from the T-junction, but I don't know how about the input port for the T-junction?? The ouput ports and input port are 50ohm. Do I have to match the input port??? Even though I match the input port, the result is not good! (S11 is about -6dB, so high for a SPDT using MEMS switches!)
If anyone also has experience with building air bridges at the CPW T-junction, please help me how to work with that!
Thanks in advance!