A compact tri-band bandpass filter with adjustable third passband using square open loop resonator embedded by open stubs

作者：Ma Xing Bing^*; Zheng Hong Xing

来源：Microwave and Optical Technology Letters, 2012, 54(8): 1817-1819.

DOI：10.1002/mop.26957

• tri-band
• bandpass filter
• open stubs
• square open loop resonator

To obtain an adjustable passband filter, some open stubs are embedded into an open loop resonator. The third resonant frequency can be adjusted by changing size of the stub added at the middle. A tri-band microstrip bandpass filter is designed to verify the proposed topology, and a prototype was fabricated. Measurement results demonstrate that operating frequency of the sample achieves around 0.86, 1.83, and 2.98 GHz.

• 出版日期2012-8
• 单位天津理工大学