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Microwave diplexers are often used on transmit / receive systems to isolate a power transmit stage from a sensitive receive stage sharing a common antenna. With the ever-increasing need for efficient bandwidth usage, diplexers exhibiting close channel spacing, low insertion loss and small channel bandwidths are increasingly necessary. Utilizing two high Q cavity resonators, a Duroid-based high performance...
Microwave band gap structures (MBG) utilizing fixed defects have received much interest because of their ability to operate as narrow band filters. With the recent interest in reconfigurable wireless devices, the need for electronically controllable narrow band filters is on the rise. By altering the defects in a MBG crystal, the transmission properties of the crystal can be changed. Using this concept,...
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