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Has anyone designed a dual mode filter?

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amicloud

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dual mode filter

Dual mode filter often use cylinder cavity resonators. Can a dual mode
filter in 2GHz get much smaller size than coaxial cavity filter?
Anyone can give me some references?thanks.
 

I have no experience from cavity dual-mode filters, only from microstrip dual-mode filters. Was convenient as remaining circuits alreade were in microstrip. I used the design below and scaled it to 2.3 GHz. Works fine.
 

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