Design and analysis of a compact ultrathin ultra‐wideband metamaterial absorber with near to unity absorption for Ku ‐band

A microstrip antenna with a circular disc design and modified ground is proposed in this paper. Circular shapes of different size have been slotted out from the radiating patch for achieving extended ultra wideband (UWB) with GSM/Bluetooth bands with maximum bandwidth of 17.7 GHz (0.88-18.6 GHz). Further, characteristic of dual notch band is achieved, when a combination of T and L-shaped slots are etched into the circular disc and ground plane respectively. Change in length of slots is controlling the notch band characteristics. The proposed antenna has rejection bandwidth of 1.3-2.2 GHz (LTE band), 3.2-3.9 GHz (WiMAX band) and 5.2-6.1 GHz (WLAN band) respectively. It covers the frequency range of 0.88-18.5 GHz with the VSWR of less than 2. Also, an equivalent parallel resonant circuit has been demonstrated for band notched frequencies of the designed antenna. The gain achieved by the proposed antenna is 6.27 dBi. This antenna has been designed, investigated and fabricated for GSM, Bluetooth, UWB, X and Ku band applications. The stable gain including H & E-plane radiation pattern with good directivity and omnidirectional behavior is achieved by the proposed antenna. Measured bandwidths are 0.5 GHz, 0.8 GHz, 1.1 GHz and 11.7 GHz respectively.

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Water-injected all-dielectric ultra-wideband and prominent oblique incidence metamaterial absorber in microwave regime

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/aa81af ◽

2017 ◽

Vol 50 (38) ◽

pp. 385304 ◽

Cited By ~ 18

Author(s):

Xiaojun Huang ◽

Helin Yang ◽

Zhaoyang Shen ◽

Jiao Chen ◽

Hail Lin ◽

...

Keyword(s):

Oblique Incidence ◽

Metamaterial Absorber ◽

Ultra Wideband ◽

Microwave Regime

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Dual-band isotropic metamaterial absorber based on near-field interaction in the Ku band

Current Applied Physics ◽

10.1016/j.cap.2019.11.024 ◽

2020 ◽

Vol 20 (2) ◽

pp. 331-336 ◽

Cited By ~ 1

Author(s):

The Linh Pham ◽

Hong Tiep Dinh ◽

Dinh Hai Le ◽

Xuan Khuyen Bui ◽

Son Tung Bui ◽

...

Keyword(s):

Near Field ◽

Metamaterial Absorber ◽

Dual Band ◽

Field Interaction ◽

Ku Band

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Design of a Compact CPW-Fed Monopole Antenna With Asymmetrical Hexagonal Slot Loaded Ground Structure for C/X/Ku Band Applications

Electrical Control and Communication Engineering ◽

10.2478/ecce-2020-0003 ◽

2020 ◽

Vol 16 (1) ◽

pp. 15-22

Author(s):

Ajay Kumar Dwivedi ◽

Brijesh Mishra ◽

Vivek Singh ◽

Pramod Narayan Tripathi ◽

Ashutosh Kumar Singh

Keyword(s):

High Frequency ◽

Ground Plane ◽

Directional Pattern ◽

Ultra Wideband ◽

Impedance Bandwidth ◽

Ground Structure ◽

High Frequency Structure Simulator ◽

Performance Matrix ◽

Novel Design ◽

Ku Band

AbstractA novel design of ultra-wideband CPW-fed compact monopole patch antenna is presented in the article. The size of the antenna is 22 × 18 × 1.6 mm and it operates well over an ultra-wideband frequency range 4.86–13.66 GHz (simulated) and 4.93–13.54 GHz (measured) covering C, X and partial Ku band applications. The proposed design consists of a defected ground plane and U-shape radiating patch along with two square shape parasitic patches in order to achieve the ultra-wideband (UWB) operations. The performance matrix is validated through measured results that indicate the wide impedance bandwidth (93.2 %) with maximum gain of 4 dBi with nearly 95 % of maximum radiation efficiency; moreover, the 3D gain pattern manifests approximately omni-directional pattern of the proposed design. The prototype has been modelled using HFSS (High Frequency Structure Simulator-18) by ANSYS, fabricated and tested using vector network analyser E5071C.

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An Ultra-Wideband THz/IR Metamaterial Absorber Based on Doped Silicon

Materials ◽

10.3390/ma11122590 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2590 ◽

Cited By ~ 2

Author(s):

Huafeng Liu ◽

Kai Luo ◽

Shihao Tang ◽

Danhua Peng ◽

Fangjing Hu ◽

...

Keyword(s):

Incident Angle ◽

Average Power ◽

Far Infrared ◽

Metamaterial Absorber ◽

Ultra Wideband ◽

Broadband Absorption ◽

Wide Range ◽

Doped Silicon ◽

Simulated Field ◽

Underlying Mechanisms

Metamaterial-based absorbers have been extensively investigated in the terahertz (THz) range with ever increasing performances. In this paper, we propose an all-dielectric THz absorber based on doped silicon. The unit cell consists of a silicon cross resonator with an internal cross-shaped air cavity. Numerical results suggest that the proposed absorber can operate from THz to far-infrared regimes, having an average power absorption of ∼95% between 0.6 and 10 THz. Experimental results using THz time-domain spectroscopy show a good agreement with simulations. The underlying mechanisms for broadband absorption are attributed to the combined effects of multiple cavities modes formed by silicon resonators and bulk absorption in the doped silicon substrate, as confirmed by simulated field patterns and calculated diffraction efficiency. This ultra-wideband absorption is polarization insensitive and can operate across a wide range of the incident angle. The proposed absorber can be readily integrated into silicon-based photonic platforms and used for sensing, imaging, energy harvesting and wireless communications applications in the THz/IR range.

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