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A reconfigurable wideband metamaterial absorber based on lumped components is proposed. The wideband can be tuned with a −10 dB bandwidth of about 1.5 GHz by selecting certain values of the resistors and the inductors. The simulated results demonstrate that the designed absorber has good performance regarding polarisation insensitiveness and wide angles of incident waves for both TE and TM polarisations. The waveguide measurement method is used to verify the simulated result of the wideband metamaterial absorber.

In this research, a new tunable dual-band metamaterial absorber with wide-angle TE and TM polarization stability is proposed. The designed absorber exhibits two high absorption peaks at 5.1 and 8.5 GHz with absorption peaks of 96 and 97%, respectively. The unit cell consists of a metallic background plane and two closed rings including two groups of T-shaped resonators, separated by a low-cost dielectric layer with thickness of 0.9 mm. By tuning the distance between the T-shaped structures and closed ring, the corresponding two resonance frequencies can be effectively separated with high absorption over 95% while keeping the closed ring unchanged. The simulated results demonstrate that the designed absorber has good characteristics of high absorption rates, polarization-insensitiveness and wide angle of incident waves. A waveguide experiment is performed to verify the good agreement between the simulated and measured results.

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In this research, a new frequency‐reconfigurable triple‐band antenna for wireless applications achieved using lumped inductor is proposed. The each three working bands can be separately and continuously reconfigured by changing the values of the lumped inductors with the radiation patterns nearly unchanged. Besides, the working state can also be modulated to make the antenna operate at single‐band/dual‐band by selecting certain values of the lumped inductors. By introducing a via hole connecting the top layer patch with the bottom layer patch, a miniaturized size of 29 × 15 × 1.6 mm3 can be achieved. The designed antenna has wide tunable band and can effectively covering 2.4/5.2/5.8 GHz Wireless Local Area Network and 3.5/5.5 GHz Worldwide Interoperability for Microwave Access bands. Besides, the designed antenna can also be applied for GSM850, GSM900, DCS1800, PCS1900, GPS, and 3G bands. The measured results have good agreement with the simulated results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1374–1379, 2015