scholarly journals Gain Enhancement of Monopole Antenna using AMC Surface

2018 ◽  
Vol 7 (3) ◽  
pp. 69-74 ◽  
Author(s):  
F. Mouhouche ◽  
A. Azrar ◽  
M. Dehmas ◽  
K. Djafer
Keyword(s):  
Band Structure ◽  
Performance Comparison ◽  
Monopole Antenna ◽  
Dual Band ◽  
Antenna Gain ◽  
Magnetic Conductor ◽  
Frequency Bands ◽  
Gain Enhancement ◽  
Unit Cells ◽  
Ring Antenna

A CPW rectangular-ring antenna over an Artificial Magnetic Conductor (AMC) is presented in this work. The AMC is a designed as a dual-band structure having an array of unit cells and operates at 2.45GHz and 5.20 GHz. A CPW antenna uses this dual-band AMC structures as a back-plane. Performance comparison is carried out with and without incorporation of AMC. The simulated and measured results show that the combination of the AMC reflector and the antenna provide directional properties at both frequency bands. It has been found that the antenna gain increases by about 5 dB.

A dual band stub-loaded AMC design for the gain enhancement of a planar monopole antenna

2018 ◽  
Vol 60 (9) ◽  
pp. 2108-2112 ◽  
Author(s):  
Kashif Nisar Paracha ◽  
Sharul K. Abdul Rahim ◽  
P. J. Soh ◽  
Hassan T. Chatha ◽  
Misran H. Misran ◽  
...  
Keyword(s):  
Monopole Antenna ◽  
Dual Band ◽  
Gain Enhancement ◽  
Planar Monopole Antenna

scholarly journals Gain-Enhanced Metamaterial Absorber-Loaded Monopole Antenna for Reduced Radar Cross-Section and Back Radiation

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1247
Author(s):  
Heijun Jeong ◽  
Yeonju Kim ◽  
Manos M. Tentzeris ◽  
Sungjoon Lim
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Metamaterial Absorber ◽  
Monopole Antenna ◽  
Magnetic Conductor ◽  
Low Profile ◽  
Before And After ◽  
Unit Cells ◽  
Lumped Elements ◽  
Peak Gain

This paper proposes a gain-enhanced metamaterial (MM) absorber-loaded monopole antenna that reduces both radar cross-section and back radiation. To demonstrate the proposed idea, we designed a wire monopole antenna and an MM absorber. The MM absorber comprised lumped elements of subwavelength unit cells and achieved 90% absorbance bandwidth from 2.42–2.65 GHz. For low-profile configurations, the MM absorber was loaded parallel to and 10 mm from the monopole antenna, corresponding to 0.09 λ0 at 2.7 GHz. The monopole antenna resonated at 2.7 GHz with a 3.71 dBi peak gain and 2.65 GHz and 6.46 dBi peak gain, before and after loading the MM absorber, respectively. Therefore, including the MM absorber increased peak gain by 2.7 dB and reduced back radiation by 15 dB. The proposed antenna radar cross-section was reduced by 2 dB compared with a monopole antenna with an artificial magnetic conductor.

Analysis of Wideband Antenna Performance over Dual Band Artificial Magnetic Conductor (AMC) Ground Plane

2015 ◽  
Vol 735 ◽  
pp. 273-277 ◽  
Author(s):  
Raimi Dewan ◽  
M.K.A. Rahim ◽  
Mohamad Rijal Hamid ◽  
M.F.M. Yusoff
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Surface Current ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Wideband Antenna ◽  
Antenna Performance ◽  
Perfect Magnetic Conductor ◽  
Additional Resonance ◽  
Unit Cells

A Coplanar Waveguide (CPW) wideband antenna operates from 2.69 GH to 6.27 GHz which act as reference antenna (RA) has been designed. A Dual Band AMC (DBAMC) unit cells have been proposed to operate at 2.45 GHz and 5.8 GHz. AMC is a metamaterial which mimics the behavior of zero reflection phase of Perfect Magnetic Conductor (PMC) at resonance frequency which not naturally existed in nature. Subsequently the antenna is incorporated with AMC unit cell, herein referred as Antenna with Dual Band AMC (ADBAMC). The DBAMC succesfully excites additional resonance at 2.45 GHz outside the initial operating range of standalone CPW wideband antenna. Incorporation of DBAMC to antenna achieves back lobe suppression at 2.45 GHz and 5.8 GHz. The overall average gain of AMC incorporated antenna is improved from 2.69 to 6.29 GHz as opposed to the standalone reference CPW wideband antenna. Study of surface current is also presented and discussed.

scholarly journals Novel Design of Electromagnetic Bandgap Using Fractal Geometry

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Huynh Nguyen Bao Phuong ◽  
Dao Ngoc Chien ◽  
Tran Minh Tuan
Keyword(s):  
Band Structure ◽  
Structural Design ◽  
Fractal Geometry ◽  
Experimental Results ◽  
Dual Band ◽  
Electromagnetic Bandgap ◽  
Unit Cells ◽  
Simulation Results ◽  
Novel Design ◽  
Good Agreement

A novel electromagnetic bandgap (EBG) structural design based on Fractal geometry is presented in this paper. These Fractals, which are the Sierpinski triangles, are arranged to repeat each 60° to produce the hexagonal unit cells. By changing the gap between two adjacent Sierpinski triangles inside EBG unit cell, we can produce two EBG structures separately that have broadband and dual bandgap. By using the suspending microtrip method, two arrays 3 × 4 of EBG unit cells are utilized to investigate the bandgap of the EBG structures. The EBG operation bandwidth of the broadband structure is about 87% and of the dual-band structure is about 40% and 35% at the center bandgap frequencies, respectively. Moreover, a comparison between the broadband EBG and the conventional mushroom-like EBG has been done. Experimental results of the proposed design show good agreement in comparison with simulation results.

scholarly journals Unidirectional Dual-Band CPW-Fed Antenna Loaded with an AMC Reflector

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Qun Luo ◽  
Huiping Tian ◽  
Zhitong Huang ◽  
Xudong Wang ◽  
Zheng Guo ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Suitable Candidate ◽  
Gain Enhancement ◽  
Low Profile ◽  
Frequency Identification

A unidirectional dual-band coplanar waveguide fed antenna (DB-CPWFA) loaded with a reflector is presented in this paper. The reflector is made of an electric ground plane, a dielectric substrate, and artificial magnetic conductor (AMC) which shows an effective dual operational bandwidth. Then, the closely spaced AMC reflector is employed under the DB-DPWFA for performance improvement including unidirectional radiation, low profile, gain enhancement, and higher front-to-back (F/B) ratio. The final antenna design exhibits an 8% and 13% impedance bandwidths for 2.45 GHz and 5.8 GHz frequency regions, respectively. The overall gain enhancement of about 4 dB is achieved. The F/B ratio is approximate to 20 dB with a 16 dB improvement. The measured results are inconsistent with the numerical values. The presented design is a suitable candidate for radio frequency identification (RFID) reader application.

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