Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 49, Issue 28, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/28/285110
Keywords
metamaterials; transmission; bandpass filter
Categories
Funding
- National Natural Science Foundation of China [61372048, 61302018, 61401089, 61571117, 61501112, 61501117]
- 111 Project [111-2-05]
- Fundamental Research Funds for the Central Universities (CUMT) [2013QNA39]
- CUMT innovation and Entrepreneurship Fund for Undergraduates [201529]
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In this letter, we report the design, fabrication and measurement of a polarization insensitive wide-angle triple-band metamaterial bandpass filter (BPF) in the microwave frequency. The proposed BPF consists of two identical metal resonant units which have three concentric square slots separated by a dielectric layer. Experimental results show that the BPF has three distinctive transmission bands centered at frequencies 6.22 GHz, 9.46 GHz and 12.14 GHz with transmission rates of -0.40 dB, -0.71 dB and -1.40 dB, respectively, agreeing well with simulation results. By introducing the substrate integrated waveguide, the filter is valid to a wide range of incident angles for both transverse electric and transverse magnetic polarizations. The triple-band metamaterial BPF can be used as multiband filters and radomes owing to its multiband transmissions, polarizations insensitive and wide-angle responses.
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