Abstract
A novel tunable bandpass FSS structure with angular stability is proposed in this paper. The presented FSS comprises periodic arrays of metallic patterns printed on both sides of the F4B substrate, on which varactors are embedded. The novelty of this design lies in its tunable characteristics as well as excellent angular stability. Results show that an angular stable passband which could be tuned from 1.8GHz to 3.4GHz by simply changing the DC bias attached to the varactor is achieved, and the passband provides a high angular stable performance up to 60 degrees for both TE and TM modes.
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